GRB220715B

This page lists all entries on GRB220715B in GRBweb

Summary Fermi GBM IPN Swift GCN 32404 GCN 32405 GCN 32406 GCN 32407 GCN 32408 GCN 32409 GCN 32410 GCN 32411 GCN 32412 GCN 32414 GCN 32422

Summary table
Variable Value Source
GRB_name_Fermi GRB220715934
T0 22:24:42 UTC GCN_circulars,Fermi GBM final loc
ra 254.8754° Swift
decl -33.5977° Swift
pos_error 2.85e-04° Swift
T90 39.68 s Fermi_GBM
T90_error 1.305 s Fermi_GBM
T90_start 22:24:43.764 UTC Fermi_GBM
fluence 1.52e-06 erg/cm² Fermi_GBM
fluence_error 4.62e-08 erg/cm² Fermi_GBM
T100 41.444 s
GBM_located False
mjd 59775.93381944444 GCN_circulars,Fermi GBM final loc
Fermi GBM table
GRB_name_Fermi GRB220715934
trigger_name bn220715934
ra 254.8750°
decl -33.5978°
pos_error 1.29e+01°
datum 2022-07-15
t_trigger 22:24:42.740 UTC
T90 39.68 s
T90_error 1.305 s
T90_start 22:24:43.764 UTC
fluence 1.52e-06 erg/cm²
fluence_error 4.62e-08 erg/cm²
flux_1024 2.49e+00 erg/cm²/s
flux_1024_error 2.44e-01 erg/cm²/s
flux_1024_time -7.68e-01 erg/cm²/s
flux_64 5.54e+00 erg/cm²/s
flux_64_error 1.45e+00 erg/cm²/s
IPN table
GRB_name GRB220715B
ra 254.8875°
decl -33.6000°
pos_error 5.00e-02°
Swift table
GRB_name GRB220715B
t_trigger 22:24:42 UTC
ra 254.8754°
decl -33.5977°
pos_error 2.85e-04°
T90 40.4 s
fluence 1.20e-06 erg/cm²
GCN 32404 table
GRB_name GRB220715B
GCN_number 32404
Detection_method Fermi GBM final loc
t_trigger 22:24:42 UTC
ra 221.7000°
decl -36.4000°
Circular_text TITLE: GCN CIRCULAR NUMBER: 32404 SUBJECT: GRB 220715B: Fermi GBM Final Real-time Localization DATE: 22/07/15 22:35:09 GMT FROM: Fermi GBM Team at MSFC/Fermi-GBM The Fermi GBM team reports the detection of a likely LONG GRB At 22:24:42 UT on 15 Jul 2022, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 220715B (trigger 679616687.73956 / 220715934). The on-ground calculated location, using the Fermi GBM trigger data, is RA = 221.7, Dec = -36.4 (J2000 degrees, equivalent to J2000 14h 46m, -36d 23'), with a statistical uncertainty of 16.5 degrees. The angle from the Fermi LAT boresight is 87.0 degrees. The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn220715934/quicklook/glg_skymap_all_bn220715934.png The HEALPix FITS file, including the estimated localization systematic, can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn220715934/quicklook/glg_healpix_all_bn220715934.fit The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn220715934/quicklook/glg_lc_medres34_bn220715934.gif
GCN 32405 table
GRB_name GRB220715B
GCN_number 32405
Detection_method Swift Det
t_trigger 22:24:42 UTC
ra 254.8890°
decl -33.5970°
Circular_text TITLE: GCN CIRCULAR NUMBER: 32405 SUBJECT: GRB 220715B: Swift detection of a burst DATE: 22/07/15 22:39:06 GMT FROM: David Palmer at LANL E. Troja (NASA/GSFC/UMCP), P. D'Avanzo (INAF-OAB), S. Dichiara (PSU), M. Ferro (INAF-OAB), J.D. Gropp (PSU), N. J. Klingler (GSFC/UMBC/CRESSTII), S. Laha (GSFC/UMBC), A. Y. Lien (U Tampa), F. E. Marshall (NASA/GSFC), A. Melandri (INAF-OAB), D. M. Palmer (LANL), T. M. Parsotan (GSFC/UMBC/CRESSTII), T. Sbarrato (INAF-OAB) and M. A. Williams (PSU) report on behalf of the Neil Gehrels Swift Observatory Team: At 22:24:42 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 220715B (trigger=1116441). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 254.889, -33.597 which is RA(J2000) = 16h 59m 33s Dec(J2000) = -33d 35' 48" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed a multi-peaked structure with a duration of about 50 sec. The peak count rate was ~2400 counts/sec (15-350 keV), at ~0 sec after the trigger. The XRT began observing the field at 22:26:20.9 UT, 98.8 seconds after the BAT trigger. Using promptly downlinked data we find an uncatalogued X-ray source located at RA, Dec 254.87520, -33.59766 which is equivalent to: RA(J2000) = 16h 59m 30.05s Dec(J2000) = -33d 35' 51.6" with an uncertainty of 5.7 arcseconds (radius, 90% containment). This location is 41 arcseconds from the BAT onboard position, within the BAT error circle. This position may be improved as more data are received; the latest position is available at https://www.swift.ac.uk/sper. We cannot determine whether the source is fading at the present time. A power-law fit to a spectrum formed from promptly downlinked event data gives a column density consistent with the Galactic value of 3.58 x 10^21 cm^-2 (Willingale et al. 2013). UVOT took a finding chart exposure of 150 seconds with the White filter starting 102 seconds after the BAT trigger. No credible afterglow candidate has been found in the initial data products. The 2.7'x2.7' sub-image covers none of the XRT error circle. The 8'x8' region for the list of sources generated on-board covers 100% of the XRT error circle. Because of the density of catalogued stars, further analysis is required to report an upper limit for any afterglow in the region. No correction has been made for the expected extinction corresponding to E(B-V) of 0.525. Burst Advocate for this burst is E. Troja (nora.gsfc AT gmail.com). Please contact the BA by email if you require additional information regarding Swift followup of this burst. In extremely urgent cases, after trying the Burst Advocate, you can contact the Swift PI by phone (see Swift TOO web site for information: http://www.swift.psu.edu/)
GCN 32406 table
GRB_name GRB220715B
GCN_number 32406
Detection_method Swift-XRT Other
ra 254.8752°
decl -33.5979°
Circular_text TITLE: GCN CIRCULAR NUMBER: 32406 SUBJECT: GRB 220715B: Prompt enhanced Swift-XRT position DATE: 22/07/15 23:08:54 GMT FROM: Phil Evans at U of Leicester P.A. Evans (U. Leicester) reports on behalf of the Swift-XRT team: Using promptly downlinked XRT event data for GRB 220715B, we find an enhanced XRT position of the afterglow: RA, Dec: 254.87517, -33.59793 which is equivalent to: RA (J2000) = 16 59 30.04 Dec (J2000) = -33 35 52.5 with an uncertainty of 1.9 arcseconds (radius, 90% confidence). Analysis of the promptly available data is online at http://www.swift.ac.uk/sper/1116441. Position enhancement is is described by Goad et al. (2007, A&A, 476, 1401) and Evans et al. (2009, MNRAS, 397, 1177). This circular is an official product of the Swift-XRT team.
GCN 32407 table
GRB_name GRB220715B
GCN_number 32407
Detection_method Swift Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 32407 SUBJECT: Swift GRB 220715B: Global MASTER-Net observations report DATE: 22/07/16 00:10:43 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs V. Lipunov, V.Kornilov, E.Gorbovskoy, K.Zhirkov, N.Tyurina, P.Balanutsa, A.Kuznetsov, D. Vlasenko, G.Antipov, D.Zimnukhov, V.Senik, E.Minkina, A.Chasovnikov, V.Topolev, D.Kuvshinov, D.Cheryasov, Ya.Kechin (Lomonosov Moscow State University, SAI, Physics Department), R. Podesta, C.Lopez, F. Podesta, C.Francile (Observatorio Astronomico Felix Aguilar OAFA), R. Rebolo, M. Serra (The Instituto de Astrofisica de Canarias), D. Buckley (South African Astronomical Observatory), O.A. Gres, N.M. Budnev (Irkutsk State University, API), L.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez, A.R.Corella, L.H.Rodriguez (INAOE, Guillermo Haro Astrophysics Observatory), A. Tlatov, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory), A. Gabovich, V.Yurkov (Blagoveschensk Educational State University) MASTER-OAFA robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Argentina (OAFA observatory of San Juan National University) was pointed to the Swift GRB 220715B ( E. Troja et al., GCN 32405) errorbox 3230 sec after notice time and 3257 sec after trigger time at 2022-07-15 23:18:59 UT, with upper limit up to 15.1 mag. The observations began at zenith distance = 34 deg. The sun altitude is -18.7 deg. The galactic latitude b = 5 deg., longitude l = 351 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=2032406 We obtain a following upper limits. Tmid-T0 | Site |Filt.| Expt. | Limit| Comment _________|_____________________|_____|_______|______|________ 3347 | MASTER-OAFA | C | 180 | 13.0 | 3746 | MASTER-OAFA | C | 180 | 14.5 | 3957 | MASTER-OAFA | C | 180 | 14.3 | 4168 | MASTER-OAFA | C | 180 | 13.5 | 4379 | MASTER-OAFA | C | 180 | 14.8 | 5784 | MASTER-OAFA | C | 180 | 15.1 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited.
GCN 32408 table
GRB_name GRB220715B
GCN_number 32408
Detection_method Optical
Circular_text TITLE: GCN CIRCULAR NUMBER: 32408 SUBJECT: GRB 220715B: BOOTES-network optical upper limits DATE: 22/07/16 00:34:30 GMT FROM: Youdong HU at IAA-CSIC Y.-D. Hu, E. Fernandez-Garcia, A. J. Castro-Tirado, M.D. Caballero-Garcia, R. Sanchez-Ramirez, I. Perez-Garcia (IAA-CSIC), C. Perez del Pulgar, A. Castellon, M. A. Castro Tirado (Univ. de Malaga), R. Fernandez-Munoz (IHSM/UMA-CSIC), M. Jelinek (ASU-CAS) and F. Rendon (IAA-CSIC and INTA-CEDEA) on behalf of a larger collaboration, report: Following the detection of GRB 220715B by both Swift (Troja et al., GCNC 32405) and Fermi (GBM team., GCNC 32404), the 0.3m BOOTES-1B robotic telescope in Mazagon (Huelva, Spain) automatically responded to this burst on Jul. 15 at 22:25:39 UT (i.e. ~57 s after trigger). In the co-added frame (30 x 10 s, clear filter), no source is detected within the enhanced XRT position (Evans et al., GCNC 32406) down to 16.1 mag. Later on, the 0.6m BOOTES-2/TELMA robotic telescope at IHSM La Mayora (UMA-CSIC) in Algarrobo Costa (Malaga, Spain) automatically pointed to the burst position at 22:26:07 UT (i.e. ~85 s after trigger). In the co-added image (25 x 10 s, clear filter), no optical afterglow is detected within the enhanced XRT position (Evans et al., GCNC 32406) down to 18.4 mag. We note the expected high galactic extinction towards the burst location, in the direction of the Galactic Bulge. We thank the staff at INTA-CEDEA and IHSM/UMA-CSIC La Mayora for their excellent support.
GCN 32409 table
GRB_name GRB220715B
GCN_number 32409
Detection_method Swift-XRT Det
ra 254.8753°
decl -33.5977°
Circular_text TITLE: GCN CIRCULAR NUMBER: 32409 SUBJECT: GRB 220715B: Enhanced Swift-XRT position DATE: 22/07/16 02:27:16 GMT FROM: Phil Evans at U of Leicester M.R. Goad, J.P. Osborne, A.P. Beardmore and P.A. Evans (U. Leicester) report on behalf of the Swift-XRT team. Using 1379 s of XRT Photon Counting mode data and 1 UVOT images for GRB 220715B, we find an astrometrically corrected X-ray position (using the XRT-UVOT alignment and matching UVOT field sources to the USNO-B1 catalogue): RA, Dec = 254.87532, -33.59775 which is equivalent to: RA (J2000): 16h 59m 30.08s Dec (J2000): -33d 35' 51.9" with an uncertainty of 2.5 arcsec (radius, 90% confidence). This position may be improved as more data are received. The latest position can be viewed at http://www.swift.ac.uk/xrt_positions. Position enhancement is described by Goad et al. (2007, A&A, 476, 1401) and Evans et al. (2009, MNRAS, 397, 1177). This circular was automatically generated, and is an official product of the Swift-XRT team.
GCN 32410 table
GRB_name GRB220715B
GCN_number 32410
Detection_method Swift-UVOT Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 32410 SUBJECT: GRB 220715B: Swift/UVOT Upper Limits DATE: 22/07/16 08:26:04 GMT FROM: Paul Kuin at MSSL N. P. M. Kuin (UCL-MSSL) and E. Troja (NASA/GSFC/UMCP) report on behalf of the Swift/UVOT team: The Swift/UVOT began settled observations of the field of GRB 220715B 103 s after the BAT trigger (Troja et al., GCN Circ. 32405). No optical afterglow consistent with the XRT position (Goad et al. GCN Circ. 32409) is detected in the initial UVOT exposures. Preliminary 3-sigma upper limits using the UVOT photometric system (Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for the first finding chart (FC) exposure and subsequent exposures are: Filter T_start(s) T_stop(s) Exp(s) Mag white_FC 103 253 147 >20.1 u_FC 316 565 246 >20.0 white 103 1369 373 >20.4 v 645 1419 97 >18.9 b 571 5005 274 >20.8 u 316 1488 319 >20.1 w1 695 1468 78 >18.8 m2 670 1443 97 >19.8 w2 621 5144 227 >19.9 The magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.525 in the direction of the burst (Schlegel et al. 1998).
GCN 32411 table
GRB_name GRB220715B
GCN_number 32411
Detection_method Swift-XRT Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 32411 SUBJECT: GRB 220715B: Swift-XRT refined Analysis DATE: 22/07/16 09:05:07 GMT FROM: Phil Evans at U of Leicester V. D'Elia (SSDC & INAF-OAR), A. D'Ai (INAF-IASFPA), A. Tohuvavohu (U. Toronto), B. Sbarufatti (PSU), D.N. Burrows (PSU), J.P. Osborne (U. Leicester), K.L. Page (U. Leicester), A.P. Beardmore (U. Leicester), A. Melandri (INAF-OAB) and E. Troja report on behalf of the Swift-XRT team: We have analysed 6.4 ks of XRT data for GRB 220715B (Troja et al. GCN Circ. 32405), from 106 s to 29.2 ks after the BAT trigger. The data are entirely in Photon Counting (PC) mode. The enhanced XRT position for this burst was given by Goad et al. (GCN Circ. 32406). The light curve can be modelled with a power-law decay with a decay index of alpha=0.75 (+/-0.06). A spectrum formed from the PC mode data can be fitted with an absorbed power-law with a photon spectral index of 2.6 (+0.5, -0.4). The best-fitting absorption column is 1.0 (+0.4, -0.3) x 10^22 cm^-2, in excess of the Galactic value of 3.6 x 10^21 cm^-2 (Willingale et al. 2013). The counts to observed (unabsorbed) 0.3-10 keV flux conversion factor deduced from this spectrum is 3.7 x 10^-11 (1.1 x 10^-10) erg cm^-2 count^-1. A summary of the PC-mode spectrum is thus: Total column: 1.0 (+0.4, -0.3) x 10^22 cm^-2 Galactic foreground: 3.6 x 10^21 cm^-2 Excess significance: 3.2 sigma Photon index: 2.6 (+0.5, -0.4) If the light curve continues to decay with a power-law decay index of 0.75, the count rate at T+24 hours will be 4.7 x 10^-3 count s^-1, corresponding to an observed (unabsorbed) 0.3-10 keV flux of 1.7 x 10^-13 (5.3 x 10^-13) erg cm^-2 s^-1. The results of the XRT-team automatic analysis are available at http://www.swift.ac.uk/xrt_products/01116441. This circular is an official product of the Swift-XRT team.
GCN 32412 table
GRB_name GRB220715B
GCN_number 32412
Detection_method Fermi GBM Det
t_trigger 22:24:42.740 UTC
Circular_text TITLE: GCN CIRCULAR NUMBER: 32412 SUBJECT: GRB 220715B: Fermi GBM detection DATE: 22/07/16 23:23:20 GMT FROM: Suraj Poolakkil at UAH O.J. Roberts (USRA), S. Poolakkil (UAH) and C.Meegan (UAH) report on behalf of the Fermi GBM Team: "At 22:24:42.74 UT on 15 July 2022, the Fermi Gamma-Ray Burst Monitor (GBM) triggered and located GRB 220715B (trigger 679616687 / 220715934), which was also detected by the Swift/BAT (E. Troja et al. 2022, GCN 32405) The Fermi GBM Final Real-time Localization (GCN 32404) is consistent with the Swift position. The angle from the Fermi LAT boresight at the GBM trigger time is 69 degrees. The GBM light curve consists of multiple peaks with a duration (T90) of about 40 s (50-300 keV). The time-averaged spectrum from T0-1.024 s to T0+43.008 s is best fit by a power law function with an exponential high-energy cutoff. The power law index is -1.09 +/- 0.23 and the cutoff energy, parameterized as Epeak, is 118 +/- 28 keV. The event fluence (10-1000 keV) in this time interval is (2.2 +/- 0.3)E-06 erg/cm^2. The 1-sec peak photon flux measured starting from T0-0.8 s in the 10-1000 keV band is 2.5 +/- 0.2 ph/s/cm^2. The spectral analysis results presented above are preliminary; final results will be published in the GBM GRB Catalog: https://heasarc.gsfc.nasa.gov/W3Browse/fermi/fermigbrst.html For Fermi GBM data and info, please visit the official Fermi GBM Support Page: https://fermi.gsfc.nasa.gov/ssc/data/access/gbm/"
GCN 32414 table
GRB_name GRB220715B
GCN_number 32414
Detection_method Swift-BAT Det
ra 254.8600°
decl -33.5860°
Circular_text TITLE: GCN CIRCULAR NUMBER: 32414 SUBJECT: GRB 220715B: Swift-BAT refined analysis DATE: 22/07/18 20:12:06 GMT FROM: Hans Krimm at NSF/NASA-GSFC A. Y. Lien (U Tampa), S. D. Barthelmy (GSFC), H. A. Krimm (NSF), S. Laha (GSFC/UMBC), C. B. Markwardt (GSFC), D. M. Palmer (LANL), T. Parsotan (GSFC/UMBC), T. Sakamoto (AGU), M. Stamatikos (OSU), E. Troja (NASA/GSFC/UMCP), (i.e. the Swift-BAT team): Using the data set from T-240 to T+962 sec from the recent telemetry downlink, we report further analysis of BAT GRB 220715B (trigger #1116441) (Troja, et al., GCN Circ. 32405). The BAT ground-calculated position is RA, Dec = 254.860, -33.586 deg which is RA(J2000) = 16h 59m 26.5s Dec(J2000) = -33d 35' 10.3" with an uncertainty of 1.1 arcmin, (radius, sys+stat, 90% containment). The partial coding was 95%. The mask-weighted light curve shows an initial pulse with a FRED shape, Beginning at just before T+0 and extending to about T+20. There is a second weaker, softer pulse centered just after T+40 sec. There are a few gaps in the light curve data, but none appear to correspond to burst activity. T90 (15-350 keV) is 40.40 +- 1.24 sec (estimated error including systematics). The time-averaged spectrum from T-0.15 to T+42.17 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.36 +- 0.11. The fluence in the 15-150 keV band is 1.2 +- 0.1 x 10^-6 erg/cm2. The 1-sec peak photon flux measured from T-0.08 sec in the 15-150 keV band is 1.3 +- 0.2 ph/cm2/sec. All the quoted errors are at the 90% confidence level. The results of the batgrbproduct analysis are available at http://gcn.gsfc.nasa.gov/notices_s/1116441/BA/
GCN 32422 table
GRB_name GRB220715B
GCN_number 32422
Detection_method Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 32422 SUBJECT: GRB 220715B: VIRT Optical Upper Limit DATE: 22/07/24 02:17:46 GMT FROM: Priyadarshini Gokuldass at U. of the Virgin Islands K. Noonan (UVI), P. Gokuldass (Florida Institute of Technology), N. Orange (OrangeWave Innovative Science, LLC), K. Smith (UVI), R. Querrard (UVI), D. Morris (UVI) report: We observed the field of GRB220715B (Fermi GRB team, GCN 32404; and Troja et al., GCN 32405) with the 0.5m Virgin Island Robotic Telescope (VIRT) at the University of the Virgin Islands' Etelman Observatory on 07-16-2022 starting at 00:06:54 UT (T+1.7 hrs). We performed a series of exposures in the R filter with a total exposure of 3910 s. The weather conditions were partly cloudy during the hours of observation with an average airmass of 1.6. We detect no new source within the enhanced XRT position error circle (Evans et al., GCNC 32406), consistent with other non-detections (Lipunov et al. GCN 32407, Hu et al, GCN 33408; and Kuin et al., GCN 32410) and report the following 5-sigma upper limit: T_mid ||Exposure ||Filter ||Limit T+ 3.1 hrs ||3910s ||R ||>19.1 The limit is estimated from comparison to nearby USNO B1 stars and is not corrected for Galactic extinction. The VIRT is still in the commissioning phase. We acknowledge financial support from NASA MUREP MIRO award 80NSSC21M0001, NASA EPSCoR award 80NSSC19M0060, and NSF EiR award 1901296.This message can be cited.