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the distribution of jet angles for short gamma-ray bursts (sgrbs) is critical to constrain because it directly affects the true energy scale and event rate. the event rate is of particular interest in the gravitational wave era. our current knowledge of the jet angle distribution comes almost exclusively from x-ray obs... | the late-time x-ray behavior of short gamma-ray bursts: implications for energetics and rates |
long-duration grbs are the most luminous sources of electromagnetic radiation known in the universe. their initial prompt flashes of mev gamma rays are followed by longer-lasting afterglow emission from radio waves to gev gamma rays. emission at tev energies had been theoretically predicted, but never confirmed by obse... | major change in understanding of grbs at tev |
report: the 60cm bootes-3/ya robotic telescope at niwa lauder in otago (new zealand) automatically responded to the swift grb 190604b (page et al. gcnc 24742) only 35 s after the burst). at the position of the swift/xrt enhanced x-ray position (evans et al. gcnc 24746), no optical afterglow is detected down to r = 15.5... | grb 190604b: bootes-3 early optical limits |
at 10:47:02 ut, the swift burst alert telescope (bat) triggered and located grb 190613b (trigger=908329). swift slewed immediately to the burst. the bat on-board calculated location is ra, dec 305.422, -4.664 which is ra(j2000) = 20h 21m 41s dec(j2000) = -04d 39' 49" with an uncertainty of 3 arcmin (radius, 90% contain... | grb 190613b: swift detection of a burst with an optical counterpart |
at 18:43:54 ut, the swift burst alert telescope (bat) triggered and located grb 191031c (trigger=932595). swift slewed immediately to the burst. the bat on-board calculated location is ra, dec 115.862, -62.335 which is ra(j2000) = 07h 43m 27s dec(j2000) = -62d 20' 04" with an uncertainty of 3 arcmin (radius, 90% contai... | grb 191031c: swift detection of a burst |
gamma-ray bursts (grbs) are extremely high-energy events that can be observed at very high redshift. in addition to γ rays, they can emit in x-ray, optical, and sometimes radio wavelengths. here, following the approach in srinivasaragavan et al. (2020); dainotti et al. (2021b,c) and dainotti et al (2022, submitted), we... | the closure relations in optical afterglow of gamma-ray bursts |
swift-xrt has performed follow-up observations of the fermi/lat-detected burst grb 211018a (arimoto et al. gcn circ. 30943), collecting 4.4 ks of photon counting (pc) mode data between t0+304.3 ks and t0+340.2 ks. five uncatalogued x-ray sources have been detected, however none of them is above the rass limit or shows ... | grb 211018a: swift-xrt observations |
we observed the field of grb 210402a (page et al., gcn 29743) using the nordic optical telescope (not) equipped with the alfosc camera. observations started at 00:19:22 ut on 2021-04-03, i.e., 2.23 hr after the burst, and we obtained 3x300 s and 5x200 s frames in the sdss r- and z- filters, respectively. preliminary an... | grb 210402a: not optical upper limits |
at 18:16:28 ut, the swift burst alert telescope (bat) triggered and located grb 220711b (trigger=1115766). swift slewed immediately to the burst. the bat on-board calculated location is ra, dec 261.993, +24.669 which is ra(j2000) = 17h 27m 58s dec(j2000) = +24d 40' 10" with an uncertainty of 3 arcmin (radius, 90% conta... | grb 220711b: swift detection of a burst |
at 21:50:37 ut, the swift burst alert telescope (bat) triggered and located grb 200925b (trigger=997453). swift slewed immediately to the burst. the bat on-board calculated location is ra, dec 246.851, +78.394 which is ra(j2000) = 16h 27m 24s dec(j2000) = +78d 23' 39" with an uncertainty of 3 arcmin (radius, 90% contai... | grb 200925b: swift detection of a burst |
at 00:56:35 ut, the swift burst alert telescope (bat) triggered and located grb 200529a (trigger=974942). swift slewed immediately to the burst. the bat on-board calculated location is ra, dec 238.751, -11.057 which is ra(j2000) = 15h 55m 00s dec(j2000) = -11d 03' 25" with an uncertainty of 3 arcmin (radius, 90% contai... | grb 200529a: swift detection of a burst |
long gamma-ray bursts (grbs) are among the most energetic explosions in the universe, and are commonly accepted to come from the core collapse of massive stars. these explosive events produce broadband (x-ray to radio) synchrotron emission, known as the "afterglow", which can be modeled to determine burst properties su... | what grbs do in the shadows: a radio bright, dust obscured population of long grbs |
swift-xrt has performed follow-up observations of the fermi/lat-detected burst grb 200613a (ohno et al. gcn circ. 27931), collecting 4.9 ks of photon counting (pc) mode data between t0+43.6 ks and t0+67.6 ks. seven uncatalogued x-ray sources are detected, of which one ("source 2") is above the rass limit, and is theref... | grb 200613a: swift-xrt afterglow detection |
we observed grb 211024a which was triggered by fermi gbm (fermi gbm team, gcn 30962), and further, follow up observations were carried out by swift/bat-guano (a. tohuvavohu et al., gcn 31006)), 0.7m growth-india telescope (git, kumar et al,. (gcn 31014)), using 1.3m devasthal fast optical telescope (dfot) located at de... | grb 211024a: 1.3m dfot observations |
swift-xrt has performed follow-up observations of the hawc-detected burst grb 200709b in a series of observations tiled on the sky. the total exposure time is 4.9 ks, distributed over 7 tiles; the maximum exposure at a single sky location was 1.4 ks. the data were collected between t0+5.1 ks and t0+16.9 ks, and are ent... | grb 200709b: swift-xrt observations |
at 03:51:12 ut, the swift burst alert telescope (bat) triggered and located grb 230618a (trigger=1175438). swift slewed immediately to the burst. the bat on-board calculated location is ra, dec 196.588, +3.306 which is ra(j2000) = 13h 06m 21s dec(j2000) = +03d 18' 20" with an uncertainty of 3 arcmin (radius, 90% contai... | grb 230618a: swift detection of a burst |
swift-xrt has performed follow-up observations of the integral-detected burst grb 210406a (mereghetti et al. gcn circ. 29767), collecting 5.1 ks of photon counting (pc) mode data between t0+169.5 and t0+244.5 ks. one uncatalogued x-ray source has been detected consistent with being within 148 arcsec of the integral pos... | grb 210406a: swift-xrt observations |
swift-xrt has performed follow-up observations of the swift/bat-detected burst grb 201214b, collecting 5.8 ks of photon counting (pc) mode data between t0+27.2 ks and t0+51.1 ks. eight uncatalogued x-ray sources have been detected, however none of them is above the rass limit or shows definitive signs of fading. theref... | grb 201214b: swift-xrt observations |
gamma-ray bursts (grbs) are the most energetic events known to occur in the universe. most of what is known about them comes from the study of their lower energy afterglow, due to the difficulty in pinpointing their origin in the gamma or x-ray spectrum. of particular interest are emissions in visible light which have ... | searching for optical grb afterglows with the evryscope |
at 07:09:38 ut on 2020-07-02, the swift burst alert telescope (bat) triggered and located a burst from soft gamma repeater sgr swift j1818.0-1607 (trigger=980513). swift slewed immediately to the source. the bat on-board calculated location is ra, dec 274.471, -16.167 which is ra(j2000) = 18h 17m 53s dec(j2000) = -16d ... | trigger 980513: swift detection of sgr swift j1818.0-1607 |
at 20:33:15 ut, the swift burst alert telescope (bat) triggered and located grb 200512a (trigger=971846). swift slewed immediately to the burst. the bat on-board calculated location is ra, dec 7.396, -2.199 which is ra(j2000) = 00h 29m 35s dec(j2000) = -02d 11' 54" with an uncertainty of 3 arcmin (radius, 90% containme... | grb 200512a: swift detection of a burst |
at 14:39:31 ut, the swift burst alert telescope (bat) triggered and located grb 200215a (trigger=956639). swift slewed immediately to the burst. the bat on-board calculated location is ra, dec 34.122, +12.781 which is ra(j2000) = 02h 16m 29s dec(j2000) = +12d 46' 50" with an uncertainty of 3 arcmin (radius, 90% contain... | grb 200215a: swift detection of a burst |
the binary neutron star merger gravitational-wave event gw170817 and observations of the subsequent electromagnetic signals at different wavelengths have helped better understand the outflows that follow these mergers. in particular, the off-axis afterglow of the jetted ejecta has allowed to probe the lateral structure... | the off-axis afterglow of gw170817: flux prediction at very high energies |
at 12:00:48 ut, the swift burst alert telescope (bat) triggered and located grb 210725b (trigger=1061554). swift slewed immediately to the burst. the bat on-board calculated location is ra, dec 192.932, +17.125 which is ra(j2000) = 12h 51m 44s dec(j2000) = +17d 07' 30" with an uncertainty of 3 arcmin (radius, 90% conta... | grb 210725b: swift detection of a burst |
swift-xrt has performed follow-up observations of the swift/bat-detected burst grb 211024a (aaron tohuvavohu et al. gcn circ. 31006), collecting 5.1 ks of photon counting (pc) mode data between t0+221.8 ks and t0+234.5 ks. four uncatalogued x-ray sources have been detected, however none of them is above the rass limit ... | grb 211024a: swift-xrt observations |
at 06:50:26 ut, the swift burst alert telescope (bat) triggered and located grb 230802a (trigger=1182085). swift slewed immediately to the burst. the bat on-board calculated location is ra, dec 76.221, +19.570 which is ra(j2000) = 05h 04m 53s dec(j2000) = +19d 34' 10" with an uncertainty of 3 arcmin (radius, 90% contai... | grb 230802a: swift detection of a burst |
at 05:50:50 ut, the swift burst alert telescope (bat) triggered and located grb 230228a (trigger=1156572). swift slewed immediately to the burst. the bat on-board calculated location is ra, dec 18.403, +44.489 which is ra(j2000) = 01h 13m 37s dec(j2000) = +44d 29' 19" with an uncertainty of 3 arcmin (radius, 90% contai... | grb 230228a: swift detection of a possibly short burst |
in order to obtain an overview of gamma-ray bursts (grbs), we need a full sample. in this paper, we collected 6289 grbs (from grb 910421 to grb 160509a) from the literature, including their prompt emission, afterglow, and host galaxy properties. we hope to use this large sample to reveal the intrinsic properties of grb... | vizier online data catalog: a comprehensive statistical study of gamma-ray bursts (wang+, 2020) |
following its installation at sutherland in late dec 2014, the saao node of the master optical transient detection network has been busy discovering new optical transient sources and following up on other transient triggers. this is the first general transient detection system to be installed at saao, allowing for the ... | master-saao: optical transient detections and followups |
at 18:35:42 ut, the swift burst alert telescope (bat) triggered and located grb 231216a (trigger=1202749). swift slewed immediately to the burst. the bat on-board calculated location is ra, dec 39.759, +33.596 which is ra(j2000) = 02h 39m 02s dec(j2000) = +33d 35' 45" with an uncertainty of 3 arcmin (radius, 90% contai... | grb 231216a: swift detection of a burst |
in this conference proceeding we summarise our investigation of a correlation discovered between the afterglow luminosity (measured at restframe 200 s; log l200s) and average afterglow decay rate (measured from restframe 200 s onwards; α>200s) of long duration gamma-ray burst (grb) afterglows, found in both the opti... | exploring the canonical behaviour of long gamma-ray bursts using an intrinsic multi-wavelength afterglow correlation |
at 22:37:26 ut, the swift burst alert telescope (bat) triggered and located grb 210222b (trigger=1034325). swift slewed immediately to the burst. the bat on-board calculated location is ra, dec 154.621, -14.898 which is ra(j2000) = 10h 18m 29s dec(j2000) = -14d 53' 52" with an uncertainty of 3 arcmin (radius, 90% conta... | grb 210222b: swift detection of a burst with an optical counterpart |
we present a method to estimate the jet opening angles of long gamma-ray bursts (grbs) using the prompt gamma-ray energetics and a correlation between the time-integrated peak energy of the grb prompt spectrum and the collimation-corrected energy in gamma rays. the derived jet opening angles using this method match wel... | estimating long grb jet opening angles and rest-frame energetics |
we performed further follow-up of the short grb 230217a (moss et al. gcn 33339, svinkin et al. gcn 33349, veres et al. gcn 33353) using the gmos instrument at gemini-south. observations were carried out in the i-band and began at 08:55:27 on 2023-02-21, corresponding to ~3.5 d after the grb trigger. following recent xr... | grb 230217a: continued gemini observations |
at 02:56:57 ut, the swift burst alert telescope (bat) triggered and located grb 230204a (trigger=1152509). swift slewed immediately to the burst. the bat on-board calculated location is ra, dec 238.164d, -50.858d which is ra(j2000) = 15h 52m 39s dec(j2000) = -50d 51' 27" with an uncertainty of 3 arcmin (radius, 90% con... | grb 230204a: swift detection of a possible burst (or possible transient swift j1552.8-5055) |
"we observed the short grb 230217a (moss et al., gcn 33339; casentini et al., gcn 33343; torii et al., gcn 33342; svinkin et al., gcn 33349) with the karl g. jansky very large array (vla) under program 23a-296 (pi: schroeder) beginning on 2023 february 18.67 ut (0.76 days post-burst) at a mean frequency of 6 ghz. the v... | grb 230217a: 6 ghz vla observations |
swift-xrt has performed follow-up observations of the maxi-detected burst grb 230204b (serino et al. gcn circ. 33265). a possible optical counterpart was reported by git (swain et al. gcn circ. 33269). swift-xrt observations consist of 4.2 ks of photon counting (pc) mode data between t0+80.5 ks and t0+97.9 ks. one unca... | grb 230204b: swift-xrt afterglow detection |
at 03:03:19 ut, the swift burst alert telescope (bat) triggered and located grb 231117a (trigger=1197027). swift slewed immediately to the burst. the bat on-board calculated location is ra, dec 332.409, +13.514 which is ra(j2000) = 22h 09m 38s dec(j2000) = +13d 30' 49" with an uncertainty of 3 arcmin (radius, 90% conta... | grb 231117a: swift detection of a bright short burst |
no abstract available. | grandma and hxmt observations of grb 221009a - the standard-luminosity afterglow of a hyper-luminous gamma-ray burst |
swift-xrt has performed follow-up observations of the swift/bat-guano-detected burst grb 230707a, collecting 4.7 ks of photon counting (pc) mode data between t0+32.7 ks and t0+51.0 ks. no x-ray sources have been detected consistent with being within 197 arcsec of the swift/bat-guano position. the 3-sigma upper limit in... | grb 230707a: swift-xrt observations |
at 01:17:52 ut, the swift burst alert telescope (bat) triggered and located grb 201006a (trigger=998907). swift slewed immediately to the burst. the bat on-board calculated location is ra, dec 61.880, +65.150 which is ra(j2000) = 04h 07m 31s dec(j2000) = +65d 08' 59" with an uncertainty of 3 arcmin (radius, 90% contain... | grb 201006a: swift detection of a burst |
at 22:37:34 ut, the swift burst alert telescope (bat) triggered and located grb 201026a (trigger=1002103). swift slewed immediately to the burst. the bat on-board calculated location is ra, dec 196.664, +83.761 which is ra(j2000) = 13h 06m 39s dec(j2000) = +83d 45' 38" with an uncertainty of 3 arcmin (radius, 90% conta... | grb 201026a: swift detection of a burst |
in this work we present the detection capability of the mirax (monitor e imageador de raios-x) experiment for gamma-ray bursts (grbs). mirax is an x-ray astronomy mission designed to perform a wide band hard x-ray (10-200 kev) survey of the sky, especially in the galactic plane. with a total detection area of 169 cm2, ... | mirax sensitivity for gamma ray bursts |
swift-xrt has performed follow-up observations of the first optical afterglow candidate observed by meerlicht (de wet et al. gcn circ. 32460) of the fermi/gbm detected burst grb 220810a (fermi gbm team, gcn 32455), collecting 2.0 ks of photon counting (pc) mode data between t0+202.1 ks and t0+208.1 ks. no x-ray sources... | grb 220810a: further swift-xrt observations |
at 02:46:52 ut, the swift burst alert telescope (bat) triggered and located grb 210930a (trigger=1075565). swift slewed immediately to the burst. the bat on-board calculated location is ra, dec 197.435, +48.623 which is ra(j2000) = 13h 09m 44s dec(j2000) = +48d 37' 22" with an uncertainty of 3 arcmin (radius, 90% conta... | grb 210930a: swift detection of a burst |
at 00:16:21 ut, the swift burst alert telescope (bat) triggered and located grb 200425a (trigger=967774). swift slewed immediately to the burst. the bat on-board calculated location is ra, dec 85.241, -13.459 which is ra(j2000) = 05h 40m 58s dec(j2000) = -13d 27' 31" with an uncertainty of 3 arcmin (radius, 90% contain... | grb 200425a: swift detection of a burst |
at 06:27:58 ut, the swift burst alert telescope (bat) triggered and located grb 201128a (trigger=1009679). swift slewed immediately to the burst. the bat on-board calculated location is ra, dec 223.136, +26.678 which is ra(j2000) = 14h 52m 33s dec(j2000) = +26d 40' 41" with an uncertainty of 3 arcmin (radius, 90% conta... | grb 201128a: swift detection of a burst |
on september 28th, 2021, fermi-lat detected high-energy emission from grb 210928a, which was also detected by fermi gbm (trigger 654487236 / 210928084). this source has previously been reported as the fermi-lat transient j1623-1752 (rani et al., atel #14939) and swift x-ray transient j162315.0-175233 (page et al.; atel... | grb 210928a: fermi-lat detection |
we observed the field of grb 210704a (berretta et al., gcn circ. 30375; d'ai et al., gcn circ. 30379; malacaria & meegan, gcn circ. 30380; kim et al., gcn circ. 30384) with the osiris instrument on the 10.4 meter gtc telescope. we observed at two epochs. the first epoch was at 2.10 days after burst and the second a... | grb 210704a: osiris/gtc observations and archival detection of the possible host galaxy |
we observed the location of the short grb 211106a; 37, with the hubble space telescope starting on 2021 november 25.; acs/f814w, using; orbits each, wfc3/f110w for 2; program 16303, as part of; x-ray afterglow detected with chandra, . within the 0. 8-arcsec error circle of the; single source in both filters at, we dete... | grb 211106a: hst observations |
the full-frame images produced by the transiting exoplanet survey satellite (tess) are invaluable tools to detect periodic and transient astrophysical events, such as variable stars, supernovae, tidal disruption events, and gamma-ray burst afterglows. our pixel-level method separates the time-series ffis into smaller g... | leveraging machine learning to detect transients in tess ffis |
we have analysed 5.7 ks of photon counting (pc) mode xrt data for the swift-bat-detected burst grb 220730a (dichiara et al. gcn circ. 32431), collected between t0+3.8 ks and t0+51.6 ks. four uncatalogued x-ray sources have been detected consistent with being within 296 arcsec of the swift-bat position, however none of ... | grb 220730a: swift-xrt observations |
gamma-ray bursts (grbs) are the most explosive phenomena in the universe after the big bang. a large fraction of grb lightcurves (lcs) shows x-ray plateaus. we perform the most comprehensive analysis of all grbs (with known and unknown redshifts) with plateau emission observed by the neil gehrels swift observatory from... | on the investigation of the closure relations for gamma-ray bursts observed by swift in the post-plateau phase and the grb fundamental plane |
the discovery of the first binary neutron star merger directly associated to a short gamma-ray bursts (gw170817/grb170817a) reveal the presence of a local population of off-axis events. in our work we investigate whether similar nearby (<200 mpc) events were observed by nasa's neil gehrels swift observatory. the ons... | search of short grbs within 200 mpc with neil gehrels swift observatory |
on christmas day in 2010, the swift observatory detected gamma rays from a mysterious source for a whopping 28 minutes. more than a decade later, astronomers are still theorizing about the cause of this unusual gamma-ray burst.digital rendering of the aftermath of a collision between a neutron star and a red giant, whi... | revisiting the "christmas burst" |
gamma-ray bursts are bright enough to be seen to great distances and their afterglows can provide redshifts and positions for their host galaxies, and in some cases details of the ism and the igm close to the burst, even for very faint hosts that are otherwise undetectable. thus grbs, despite their small numbers, offer... | identifying gamma-ray bursts at very high redshifts |
gamma-ray bursts (grbs) are fascinating events due to their panchromatic nature. we study optical plateaus in grb afterglows via an extended search into archival data. we comprehensively analyze all published grbs with known redshifts and optical plateaus observed by many ground-based telescopes (e.g., subaru telescope... | the optical two and three-dimensional fundamental plane correlations for more than 180 gamma-ray burst afterglows with swift/uvot, ratir, and the subaru telescope |
jets are a ubiquitous phenomena in astrophysics — spanning a remarkable range in size, velocity, and energy output. but only a handful of systems are capable of accelerating ejecta to speeds approaching that of light — the best known examples of such relativistic jets are blazars and gamma-ray bursts. here i describe r... | relativistic explosions across the universe |
grb181201a was discovered by the ibis and isgri instruments on board the integral satellite on 2018 december 1 at 02:38 ut (mereghetti+ 2018gcn.23469....1m). the optical afterglow was discovered in master (lipunov+ 2010adast2010e..30l) global robotic net observations (podesta+ 2018gcn.23470....1p) 10s after the integra... | vizier online data catalog: radio to uv observations of grb 181201a (laskar+, 2019) |
we observed the field of grb 210704a (kunzweiler et al., gcn circ. 30369; ursi et al., gcn circ. 30372; berretta et al., gcn circ. 30375; prasad et al., gcn 30378; malacaria et al. gcn 30380), covering the position of the x-ray afterglow reported by d'ai et al. (gcn circ. 30379) with the italian 3.6m tng telescope equi... | grb 210704a: tng detection of the optical afterglow candidate |
swift-xrt has performed follow-up observations of the swift/bat-detected burst grb 210506a (aaron tohuvavohu et al. gcn circ. 29947), collecting 4.8 ks of photon counting (pc) mode data between t0+29.0 ks and t0+45.6 ks. three uncatalogued x-ray sources have been detected consistent with being within 296 arcsec of the ... | grb 210506a: swift-xrt observations |
short gamma-ray bursts (sgrbs) are produced on the coalescence of two compact objects such as two neutron stars. these cataclismic events release a large amount of energy in gravitational waves during the coalescence event to a single compact object. we present the results of the study of grb 160410a that, at $z$ = 1.7... | absorption spectroscopy of grb 160410a: the first complete study of the ism of a short grb |
at 06:53:41 ut, the swift burst alert telescope (bat) triggered and located grb 210419a (trigger=1044032). swift slewed immediately to the burst. the bat on-board calculated location is ra, dec 86.862, -65.539 which is ra(j2000) = 05h 47m 27s dec(j2000) = -65d 32' 20" with an uncertainty of 3 arcmin (radius, 90% contai... | grb 210419a: swift detection of a burst |
swift-xrt has performed follow-up observations of the swift/bat-guano-detected burst grb 210622a (james delaunay et al. gcn circ. 30302), collecting 4.5 ks of photon counting (pc) mode data between t0+171.2 ks and t0+221.6 ks. no x-ray sources have been detected consistent with being within 246 arcsec of the swift/bat-... | grb 210622a: swift-xrt observations |
at 09:43:11 ut, the swift burst alert telescope (bat) triggered and located grb 210712a (trigger=1059881). swift slewed immediately to the burst. the bat on-board calculated location is ra, dec 97.337, -35.393 which is ra(j2000) = 06h 29m 21s dec(j2000) = -35d 23' 33" with an uncertainty of 3 arcmin (radius, 90% contai... | grb 210712a: swift detection of a burst |
after the multi-messenger detection of the binary neutron star merger gw170817, associated with gamma-ray burst (grb) 170817a, one big open question left is the nature of the compact remnant which acts as a central engine for the grb. in the context of cosmological grbs, it has been suggested that x-ray afterglows show... | post-merger gravitational wave searches using the cross-correlation algorithm |
at 20:52:56 ut, the swift burst alert telescope (bat) triggered and located grb 211207a (trigger=1088376). swift slewed immediately to the burst. the bat on-board calculated location is ra, dec 149.625, -24.352 which is ra(j2000) = 09h 58m 30s dec(j2000) = -24d 21' 05" with an uncertainty of 3 arcmin (radius, 90% conta... | grb 211207a: swift detection of a burst with an optical counterpart |
at 19:56:44.60 ut, the swift burst alert telescope (bat) triggered and located grb 190829a (trigger=922968). swift slewed immediately to the burst. the bat on-board calculated location is ra, dec 44.540, -8.968 which is ra(j2000) = 02h 58m 10s dec(j2000) = -08d 58' 03" with an uncertainty of 3 arcmin (radius, 90% conta... | grb 190829a: swift detection of a burst consistent with a galaxy at z=0.08 |
swift is currently the only mission that can localize a short grb to < 3 arc-minute resolution, or better. in o4 we plan to use swift as a discovery tool for the next ns-ns merger that is detected in gravitational waves by ligo/virgo/kagra in the upcoming o4 run, and rapidly report that location with arc-minute or b... | the swift plan for o4: catching ns-ns mergers on the fly |
at 02:25:10 ut, the swift burst alert telescope (bat) triggered and located grb 200410a (trigger=965638). swift slewed immediately to the burst. the bat on-board calculated location is ra, dec 299.637, +51.763, which is ra(j2000) = 19h 58m 33s dec(j2000) = +51d 45' 48" with an uncertainty of 3 arcmin (radius, 90% conta... | grb 200410a: swift detection of a burst with a possible optical counterpart |
gamma-ray bursts (grbs) are very energetic cosmological transients. long grbs are usually associated with type ib/c supernovae (sne), and we refer to them as grb-sne. since the associated sn for a given grb is observed only at low redshift, a possible selection effect exists when we consider intrinsically faint sources... | the quest for new correlations in the realm of the gamma-ray burst-supernova connection |
we have used chandra, hst and the vla to observe a sample of extremely energetic gamma-ray bursts detected by the large area telescope (lat) in a large fraction of cases the burst afterglows show no sign of a jet-break. more to follow. | the nature of the largely unbreakable lat bursts |
"the chandra x-ray observatory observed the position of the short-duration grb 231117a (laha et al., gcn 35071, navaneeth et al., gcn 35072, cattaneo et al., gcn 35075, svinkin et al., gcn 35079, cheung et al., gcn 35081) starting on 2023 november 21 at 06:22:13 ut. we obtained an acis-s observation under proposal 2440... | grb 231117a: chandra afterglow detection |
at 01:29:08 ut, the swift burst alert telescope (bat) triggered and located grb 231230a (trigger=1205319). swift slewed immediately to the burst. the bat on-board calculated location is ra, dec 245.197, +58.120 which is ra(j2000) = 16h 20m 47s dec(j2000) = +58d 07' 11" with an uncertainty of 3 arcmin (radius, 90% conta... | grb 231230a: swift detection of a burst |
at 19:16:13 ut, the swift burst alert telescope (bat) triggered and located grb 180614a (trigger=841548). swift slewed immediately to the burst. the bat on-board calculated location is ra, dec 3.157, +46.943, which is ra(j2000) = 00h 12m 38s dec(j2000) = +46d 56' 34" with an uncertainty of 3 arcmin (radius, 90% contain... | grb 180614a: swift detection of a burst |
the distribution of jet angles for short gamma-ray bursts (sgrbs) is critical to constrain as it directly affects the true energy scale and event rate, which is of particular interest in the midst of the new lvk run for next year. our current knowledge of the jet angle distribution comes almost exclusively from x-ray o... | tracking the x-ray emission of the remarkable sgrb 211106a |
swift-xrt has performed follow-up observations of the swift/bat-detected burst grb 200623a (james delaunay et al. gcn circ. 28013), collecting 5.0 ks of photon counting (pc) mode data between t0+37.8 ks and t0+50.1 ks. three uncatalogued x-ray sources have been detected, however none of them is above the rass limit or ... | grb 200623a: swift-xrt observations |
at 08:21:16 ut, the swift burst alert telescope (bat) triggered and located grb 180626a (trigger=844615). swift slewed immediately to the burst. the bat on-board calculated location is ra, dec 243.567, +14.764 which is ra(j2000) = 16h 14m 16s dec(j2000) = +14d 45' 52" with an uncertainty of 3 arcmin (radius, 90% contai... | grb 180626a: swift detection of a burst with an optical counterpart |
certain features of gamma-ray bursts (grbs) are hard to explain in thecontext of the standard forward shock (fs) model. specifically, the x-raylight curves of a few grb afterglows show a steep drop that is not seenin the optical. a solution is that the early x-ray emission is poweredby the spin-down of a newly born mag... | late x-ray observations to unveil non-forward shock components in grb afterglows |
torsional oscillations excited in the neutron star crust strongly depend on the crust elasticity. once one would identify the observed frequencies of a neutron star with crustal torsional oscillations, one might extract the crust or neutron star properties. in practice, it has been suggested that the crust equation of ... | constraint on the mass and radius of grb 200415a using the high-frequency qpos |
since their discovery in the late 1960s gamma-ray burst (grb) emission has been deeply investigated with the help of the huge amount of data collected covering the entire electromagnetic spectrum. this large and broadband dataset was essential to constitute a general picture describing the grb physics, revealing the mo... | theoretical implications on the very high energy emission from grb 190114c |
grb 221009a was the brightest gamma-ray burst (grb) detected since the start of grb observations. even though it saturated fermi-gbm, it presents a rich and unique data set to test theoretical models of gamma-ray production. we present spectral analysis of the pulses not affected by instrumental saturation and confront... | physical properties of the brightest gamma-ray burst based on observations by the fermi gamma-ray burst monitor |
at 22:29:51 ut, the swift burst alert telescope (bat) triggered and located grb 170330a (trigger=744773). swift slewed immediately to the burst. the bat on-board calculated location is ra, dec 283.326, -13.437, which is ra(j2000) = 18h 53m 18s dec(j2000) = -13d 26' 12" with an uncertainty of 3 arcmin (radius, 90% conta... | grb 170330a: swift detection of a burst |
the distribution of jet angles for short gamma-ray bursts (sgrbs) is critical to constrain because it directly affects the true energy scale and event rate. the event rate is of particular interest in the gravitational wave era. our current knowledge of the jet angle distribution comes almost exclusively from x-ray obs... | the late-time x-ray behavior of short gamma-ray bursts: implications for energetics and rates |
long gamma-ray bursts (grbs) with a plateau phase in their x-ray afterglows obeys a three-dimensional (3d) relation (dainotti et al. 2016), between the rest-frame time at the end of the plateau, ta, its corresponding x-ray luminosity, la, and the peak luminosity in the prompt emission, lpeak, an extension of the two-di... | a study of the gamma-ray burst fundamental plane |
at 21:05:52 ut, the swift burst alert telescope (bat) triggered and located grb 211023b (trigger=1080859). swift slewed immediately to the burst. the bat on-board calculated location is ra, dec 170.302, +39.137 which is ra(j2000) = 11h 21m 12s dec(j2000) = +39d 08' 14" with an uncertainty of 3 arcmin (radius, 90% conta... | grb 211023b: swift detection of a possibly short burst with an optical counterpart |
at 22:02:18 ut, the swift burst alert telescope (bat) triggered and located grb 210323a (trigger=1038247). swift slewed immediately to the burst. the bat on-board calculated location is ra, dec 317.952, +25.378 which is ra(j2000) = 21h 11m 49s dec(j2000) = +25d 22' 40" with an uncertainty of 3 arcmin (radius, 90% conta... | grb 210323a: swift detection of a short burst |
the optical afterglow of the recently discovered bright gamma-ray burst grb180914b (gcn 23226, 23231, 23232, 23234) was detected on stacked 3 x 300 sec ccd frames taken with the 0.6/0.9m schmidt telescope through bvri filters on 2018-09-18.94 ut (4.18 days after the initial burst in the observer frame). | detection and photometry of the optical afterglow of the gamma-ray burst grb180914b |
at 04:41:15 ut, the swift burst alert telescope (bat) triggered and located grb 190718a (trigger=915091). swift slewed immediately to the burst. the bat on-board calculated location is ra, dec 336.531, -41.221 which is ra(j2000) = 22h 26m 07s dec(j2000) = -41d 13' 13" with an uncertainty of 3 arcmin (radius, 90% contai... | grb 190718a: swift detection of a burst |
swift-xrt has performed follow-up observations of the fermi/lat-detected burst grb 170510a (bissaldi et al. gcn circ. 21080) in a series of observations tiled on the sky. the total exposure time is 4.7 ks, distributed over 7 tiles; the maximum exposure at a single sky location was 1.4 ks. the data were collected betwee... | grb 170510a: swift-xrt observations |
at 07:09:01 ut, the swift burst alert telescope (bat) triggered and located grb 201221a (trigger=1013852). swift slewed immediately to the burst. the bat on-board calculated location is ra, dec 214.477, -45.411 which is ra(j2000) = 14h 17m 55s dec(j2000) = -45d 24' 38" with an uncertainty of 3 arcmin (radius, 90% conta... | grb 201221a: swift detection of a burst |
we propose to design, build, and fly burstcube: a 6u cubesat with four csi detectors sensitive to gamma-rays from 10 kev to 1 mev. burstcube autonomously detects gamma-ray bursts (grbs) onboard, rapidly downlinking data for timing and localizations that are disseminated to ground-based observers to maximize the chances... | burstcube |
the distribution of jet angles for short gamma-ray bursts (sgrbs) is critical to constrain as it directly affects the true energy scale and event rate. the event rate is of particular interest in the gravitational wave era. our current knowledge of the jet angle distribution comes almost exclusively from x-ray observat... | the wide angle outflow of sgrb 210726a |
swift burst alert telescope (bat) triggered and located grb 210504a (trigger=1046782), with the trigger time most likely between 13:40 and 13:58 ut. no bat information is available at this moment. xrt began observing the field of the new trigger at 13:58:28 ut. in a promptly-downlinked image we find an x-ray source at ... | grb 210504a: swift detection of a burst |
at 21:10:37 ut, the swift burst alert telescope (bat) triggered and located grb 230322b (trigger=1161127). swift slewed immediately to the burst. the bat on-board calculated location is ra, dec 16.565, -47.729 which is ra(j2000) = 01h 06m 16s dec(j2000) = -47d 43' 42" with an uncertainty of 3 arcmin (radius, 90% contai... | grb 230322b: swift detection of a burst with optical counterpart |
at 18:20:38 ut, the swift burst alert telescope (bat) triggered and located grb 220118a (trigger=1093742). swift slewed immediately to the burst. the bat on-board calculated location is ra, dec 192.274, +22.909 which is ra(j2000) = 12h 49m 06s dec(j2000) = +22d 54' 33" with an uncertainty of 3 arcmin (radius, 90% conta... | grb 220118a: swift detection of a burst with an optical counterpart |
the main aim of this thesis is to study the afterglow phase in the gamma-ray burst (grb) light curves to better understand the physics and the radiation processes driving these phenomena, and to eventually use this knowledge in search for a method to turn grbs into cosmological standard candles. in the proceedings a sa... | new study of afterglow light curves in gamma ray bursts |
at 20:14:09 ut, the swift burst alert telescope (bat) triggered and located grb 210724a (trigger=1061482). swift slewed immediately to the burst. the bat on-board calculated location is ra, dec 227.407d, -6.274d which is ra(j2000) = 15h 09m 38s dec(j2000) = -06d 16' 27" with an uncertainty of 3 arcmin (radius, 90% cont... | grb 210724a: swift detection of a burst |
we have analysed 2.7 ks of photon counting (pc) mode xrt data for the swift-bat-detected burst grb 210218a (stamatikos et al. gcn circ. 29537), collected between t0+170 ks and t0+210 ks s. one uncatalogued x-ray source has been detected consistent with being within 296 arcsec of the swift-bat position, it is below the ... | grb 210218a: swift-xrt observations |
several gamma-ray burst (grb) afterglow light curves show a so-called "plateau" phase in the x-rays. theoretical models predict that a long-lived central engine, such as a highly magnetized neutron star (magnetar), could power this plateau phase by injecting energy into the afterglow shock. under the hypothesis that th... | grbs with afterglow plateaus during ligo s6/o1/o2/o3 runs |
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