GRB240715A

This page lists all entries on GRB240715A in GRBweb

Summary Fermi GBM IPN GCN 36866 GCN 36872 GCN 36873 GCN 36875 GCN 36877 GCN 36878 GCN 36881 GCN 36883 GCN 36886 GCN 36887 GCN 36890 GCN 36891 GCN 36981

Summary table
Variable Value Source
GRB_name_Fermi GRB240715239
T0 5:44:02 UTC GCN_circulars,IPN Triangulation
ra 5.2708° IPN
decl -36.5167° IPN
pos_error 3.67e-01° IPN
T90 0.16 s Fermi_GBM
T90_error 0.045 s Fermi_GBM
T90_start 5:44:03.240 UTC Fermi_GBM
fluence 1.50e-06 erg/cm² Fermi_GBM
fluence_error 1.44e-08 erg/cm² Fermi_GBM
T100 1.4 s
GBM_located False
mjd 60506.238912037035 GCN_circulars,IPN Triangulation
Fermi GBM table
GRB_name_Fermi GRB240715239
trigger_name bn240715239
ra 8.3900°
decl -29.4200°
pos_error 4.21e+00°
datum 2024-07-15
t_trigger 5:44:03.256 UTC
T90 0.16 s
T90_error 0.045 s
T90_start 5:44:03.240 UTC
fluence 1.50e-06 erg/cm²
fluence_error 1.44e-08 erg/cm²
flux_1024 7.96e+00 erg/cm²/s
flux_1024_error 2.85e-01 erg/cm²/s
flux_1024_time -4.48e-01 erg/cm²/s
flux_64 4.72e+01 erg/cm²/s
flux_64_error 2.01e+00 erg/cm²/s
IPN table
GRB_name GRB240715A
ra 5.2708°
decl -36.5167°
pos_error 3.67e-01°
GCN 36866 table
GRB_name GRB240715A
GCN_number 36866
Detection_method Fermi GBM final loc
t_trigger 5:44:03 UTC
ra 8.4000°
decl -29.4000°
Circular_text TITLE: GCN CIRCULAR NUMBER: 36866 SUBJECT: GRB 240715A: Fermi GBM Final Real-time Localization DATE: 24/07/15 05:54:29 GMT FROM: Fermi GBM Team at MSFC/Fermi-GBM The Fermi GBM team reports the detection of a likely SHORT GRB At 05:44:03 UT on 15 Jul 2024, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 240715A (trigger 742715048.256066 / 240715239). The on-ground calculated location, using the Fermi GBM trigger data, is RA = 8.4, Dec = -29.4 (J2000 degrees, equivalent to J2000 00h 33m, -29d 23'), with a statistical uncertainty of 3.0 degrees. The angle from the Fermi LAT boresight is 75.0 degrees. The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn240715239/quicklook/glg_skymap_all_bn240715239.png The HEALPix FITS file, including the estimated localization systematic, can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn240715239/quicklook/glg_healpix_all_bn240715239.fit The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn240715239/quicklook/glg_lc_medres34_bn240715239.gif
GCN 36872 table
GRB_name GRB240715A
GCN_number 36872
Detection_method IPN Triangulation
t_trigger 5:44:02 UTC
ra 5.2710°
decl -36.5210°
Circular_text TITLE: GCN CIRCULAR NUMBER: 36872 SUBJECT: IPN triangulation of GRB 240715A (short) DATE: 24/07/15 15:46:04 GMT FROM: Anna Ridnaia at Ioffe Institute A.S. Kozyrev, D.V. Golovin, M.L. Litvak, I.G. Mitrofanov, and A.B. Sanin on behalf of the HEND/Mars Odyssey team, A. Ridnaia, D. Frederiks, A. Lysenko, D. Svinkin, and T. Cline on behalf of the Konus-Wind team, A. Goldstein, M. S. Briggs, C. Wilson-Hodge, and E. Burns on behalf of the Fermi GBM team, E. Bozzo and C. Ferrigno, on behalf of the INTEGRAL SPI-ACS GRB team, and W. Boynton, C. Fellows, K. Harshman, H. Enos, R. Starr, and A.S. Gardner on on behalf of the GRS-Odyssey GRB team, report: The short-duration GRB 240715A (Fermi-GBM detection: The Fermi GBM team, GCN 36866) was detected by Fermi (GBM trigger 742715048), Konus-Wind, INTEGRAL (SPI-ACS), and Mars-Odyssey (HEND) at about 20642 s UT (05:44:02). We have triangulated it to a preliminary, 3 sigma error box whose coordinates are: --------------------------------------------- RA(2000), deg Dec(2000), deg --------------------------------------------- Center: 5.271 (00h 21m 05s) -36.521 (-36d 31' 16") Corners: 5.188 (00h 20m 45s) -36.486 (-36d 29' 11") 5.394 (00h 21m 35s) -36.672 (-36d 40' 20") 5.354 (00h 21m 25s) -36.556 (-36d 33' 22") 5.148 (00h 20m 36s) -36.369 (-36d 22' 09") --------------------------------------------- The error box area is 48 sq. arcmin, and its maximum dimension is 22 arcmin (the minimum one is 3 arcmin). The Sun distance was 118 deg. The IPN localization is consistent with, but reduces the area of, the Fermi-GBM final localization. Swift ToO has been submitted. This localization may be improved. A triangulation map and HEALPix FITS file are posted at http://www.ioffe.ru/LEA/GRBs/GRB240715_T20645/IPN/ The HEALPix triangulation map is the multi-order HEALPix in units of probability density. The Konus-Wind time history and spectrum will be given in a forthcoming GCN Circular.
GCN 36873 table
GRB_name GRB240715A
GCN_number 36873
Detection_method Fermi GBM Other
ra 8.3960°
decl -29.3970°
Circular_text TITLE: GCN CIRCULAR NUMBER: 36873 SUBJECT: GRB240715A: GRANDMA Optical Upper Limits DATE: 24/07/15 16:05:26 GMT FROM: Thomas Hussenot-Desenonges at IJCLab T. Hussenot-Desenonges, P. Hello (IJCLAB), N. Kochiashvili (AbAO), R. Strausbaugh (EIU), C. Andrade (UMN), S. Antier (OCA), M. Coughlin (UMN), P-A Duverne (APC), N. Guessoum (AUS), S. Karpov (FZU), T. Pradier (Unistra/IPHC), D. Turpin (CEA-Saclay/Irfu), A. Klotz (CNRS-OMP-IRAP), M. Boer, S. Gervasoni, C. Limonta (OCA), De Almeida, L., Corradi, W. , Tosta e Melo, I, Sasaki, N., Navarete, F., Braga, L. (LNA) on behalf of the GRANDMA collaboration. GRANDMA performed follow-up in response to the GRB240715A (presumably short GRB) detected by Fermi GBM (GCN 36866). TAROT-TCH observed the first image at 2024-07-15T07:21:24, 1.5 hours after the trigger time, and OPD started observations at 2024-07-15T08:06:49, 2.5 hours from trigger. We did not detect any new source with SNR>5 in a 2x1.8 degrees field with RA from 7.5 to 9.6 degrees and DEC from -28.5 to -30.2 degrees; observed by TAROT-TCH in Clear, r,i and z at T0+1.5h, T0+3h, T0+4.5h and T0+5h respectively. The 5-sigma upper-limits we obtain are repectively 19.8, 20.2, 19.4 and 16.7, in G, r, i and z filters (AB magnitudes). In the OPD field of view, a 0.2x0.2 degrees box centered on RA,DEC:8.396,-29.397 ; we obtain a deeper upperlimit of 21.3 in R filter (Vega magnitude). TAROT-TCH and OPD data have been reduced by a single data processing pipeline STDPIPE (Karpov et al., 2022) GRANDMA is a worldwide telescope network (grandma.ijclab.in2p3.fr) devoted to the observation of transients in the context of multi-messenger astrophysics (Antier et al. 2020 MNRAS 49, 5518).
GCN 36875 table
GRB_name GRB240715A
GCN_number 36875
Detection_method Fermi GBM Det
t_trigger 5:44:03.260 UTC
Circular_text TITLE: GCN CIRCULAR NUMBER: 36875 SUBJECT: GRB 240715A: Fermi GBM Observation DATE: 24/07/15 17:01:42 GMT FROM: Cuán de Barra at UCD C. de Barra (UCD) and C. Meegan (UAH) reports on behalf of the Fermi Gamma-ray Burst Monitor Team: At 05:44:03.26 UT on 15 July 2024, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 240715A (trigger 742715048/240715239). The Final Real-time Localization was reported previously (Fermi GBM Team 2024, GCN 36866). The angle from the Fermi LAT boresight is 75 degrees. The GBM light curve consists of a single emission episode with a duration (T90) of about 0.16 s (50-300 keV). The time-averaged spectrum from T0-0.06 to T0+0.19 is is best fit by a power law function with an exponential high-energy cutoff. The power law index is -0.82 +/- 0.03 and the cutoff energy, parameterized as Epeak, is 2323 +/- 232 keV. The spectrum is equally well fit by a Band function with Epeak = 2275 +/- 267 keV, alpha = -0.82 +/- 0.03 and beta = -3.86 +/- 1.75. The event fluence (10-1000 keV) in this time interval is (2.9 +/- 0.9)E-06 erg/cm^2. The 64-ms peak photon flux measured starting from T0+0.064 s in the 10-1000 keV band is 47 +/- 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 36877 table
GRB_name GRB240715A
GCN_number 36877
Detection_method Fermi GBM Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 36877 SUBJECT: Fermi GRB 240715A: Global MASTER-Net observations report DATE: 24/07/16 00:30:50 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs V. Lipunov, V.Kornilov, E. Gorbovskoy, K. Zhirkov, N.Tyurina, P.Balanutsa, A.Kuznetsov, V.Senik, D. Vlasenko, G.Antipov, D.Zimnukhov, E.Minkina, A.Chasovnikov, V.Topolev, D.Kuvshinov, D. Cheryasov, Ya.Kechin, Yu.Tselik, A. Sosnovskij (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. Gress, N.M. Budnev, O.Ershova (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), V. Yurkov, A. Gabovich (Blagoveschensk Educational State University) MASTER-SAAO robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in South Africa (South African Astronomical Observatory) started inspect of the Fermi GRB 240715A ( Fermi GBM team, GCN 36866) errorbox 56006 sec after notice time and 56048 sec after trigger time at 2024-07-15 21:18:11 UT, with upper limit up to 15.4 mag. The observations began at zenith distance = 77 deg. The sun altitude is -68.0 deg. The galactic latitude b = -86 deg., longitude l = 1 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=2530751 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 56078 | 2024-07-15 21:18:11 | MASTER-SAAO | (00h 26m 31.52s , -29d 17m 42.8s) | C | 60 | 13.5 | 56158 | 2024-07-15 21:19:30 | MASTER-SAAO | (00h 35m 42.07s , -29d 19m 06.1s) | C | 60 | 15.4 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited.
GCN 36878 table
GRB_name GRB240715A
GCN_number 36878
Detection_method Swift Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 36878 SUBJECT: GRB 240715A: Swift ToO observations DATE: 24/07/16 01:07:38 GMT FROM: Phil Evans at U of Leicester P. A. Evans (U. Leicester) reports on behalf of the Swift team: Swift has initiated a ToO observation of the IPN GRB 240715A. Automated analysis of the XRT data will be presented online at https://www.swift.ac.uk/ToO_GRBs/00021699 Any uncatalogued X-ray sources detected in this analysis will be reported on this website and via GCN COUNTERPART notices. These are not necessarily related to the IPN event. Any X-ray source considered to be a probable afterglow candidate will be reported via a GCN Circular after manual consideration. Details of the XRT automated analysis methods are detailed in Evans et al. (2007, A&A, 469, 379; 2009, MNRAS, 397, 1177 and 2014, ApJS, 210, 8). This circular is an official product of the Swift-XRT team.
GCN 36881 table
GRB_name GRB240715A
GCN_number 36881
Detection_method INTEGRAL
Circular_text TITLE: GCN CIRCULAR NUMBER: 36881 SUBJECT: SVOM/GRM In-Flight Trigger of GRB 240715A DATE: 24/07/16 08:17:59 GMT FROM: tanwj@ihep.ac.cn SVOM/GRM team: Yue Huang, Yong-Wei Dong, Jiang-Tao Liu, Min Gao, Hao-Xuan Guo, Jiang He, Lu Li, Yong-Ye Li, Hong-Wei Liu, Xin Liu, Hao-Li Shi, Li-Ming Song, Jian-Chao Sun, You-Li Tuo, Hao-Xi Wang, Jin Wang, Jin-Zhou Wang, Ping Wang, Rui-Jie Wang, Yu-Xi Wang, Bo-Bing Wu, Shao-Lin Xiong, Jian-Ying Ye, Yi-Tao Yin, Wen-Hui Yu, Fan Zhang, Li Zhang, Peng Zhang, Shuang-Nan Zhang, Yan-Ting Zhang, Shu-Min Zhao, Xiao-Yun Zhao, Shi-Jie Zheng (IHEP), Maria-Grazia Bernardini (LUPM/INAF-OAB), Laurent Bouchet (IRAP), David Corre (CEA), Patrick Maeght (LUPM), Frédéric Piron (LUPM), Jingwei Wang (IAP) SVOM JSWG: Jian-Yan Wei (NAOC), Bertrand Cordier (CEA), Shuang-Nan Zhang (IHEP), Stéphane Basa (LAM), Jean-Luc Attéia (IRAP), Arnaud Claret (CEA), Zi-Gao Dai (USTC), Frédéric Daigne (IAP), Jin-Song Deng (NAOC), Andrea Goldwurm (APC), Diego Götz (CEA), Xu-Hui Han (NAOC), Cyril Lachaud (APC), En-Wei Liang (GXU), Yu-Lei Qiu (NAOC), Susanna Vergani (Obs.Paris), Jing Wang (NAOC), Chao Wu (NAOC), Li-Ping Xin (NAOC), Bing Zhang (UNLV) report on behalf of the SVOM team: During the commissioning phase, the SVOM/GRM was triggered by a short GRB 240715A at 2024-07-15T05:44:03.400 UT (T0), which was also observed by Fermi/GBM (GCN 36866) and INTEGRAL/SPI-ACS (TrigID 10791). This is the first GRB triggered by GRM in-flight. The real-time alert data and light curves produced were downlinked to the ground through the VHF system with low latency. The light curve shows that this burst consists of a single peak with a duration of less than 0.8 s, indicating that it is a short burst. The GRM light curve can be found here: http://www.bursthub.cn//admin/static/svgrb240715A.png During this period, the SVOM/ECLAIRs was in configuration mode and did not collect scientific data, so there was no observation of this burst with ECLAIRs. The Space Variable Objects Monitor (SVOM) is a China-France joint mission led by the Chinese National Space Administration (CNSA, China), National Center for Space Studies (CNES, France) and the Chinese Academy of Sciences (CAS, China), which is dedicated to observing gamma-ray bursts and other transient phenomena in the energetic universe. GRM is developed by the Institute of High Energy Physics (IHEP) of CAS. The SVOM point of contact for these bursts is: Shao-Lin Xiong (IHEP)(xiongsl@ihep.ac.cn)
GCN 36883 table
GRB_name GRB240715A
GCN_number 36883
Detection_method Swift-XRT Other
ra 5.1463°
Circular_text TITLE: GCN CIRCULAR NUMBER: 36883 SUBJECT: GRB 240715A: TRT optical upper limit on one Swift/XRT candidate DATE: 24/07/16 10:03:27 GMT FROM: Dong Xu at NAOC/CAS S. Tinyanont, R. Anutarawiramkul, P. Butpan (NARIT), J. An, X. Liu, S.Q. Jiang, S.Y. Fu, Z.P. Zhu, D. Xu, Z. Fan, W.X. Li, N.C. Sun, Y.N. Wang (NAOC) report on behalf of a large collaboration: We observed the field of short-hard GRB 240715A detected by Fermi/GBM (Fermi GBM team, GCN 36866), IPN (Kozyrev et al., GCN 36872), and SVOM/GRM (Huang et al., GCN 36881) using the 0.7-m telescope of the Thai Robotic Telescope (TRT) network, located at Cerro Tololo, Chile. We obtained 3 x 300 s R-band frames at a median time 24.0 hr after the Fermi trigger. We observed the "Good" one (R.A. = 00h20m35.12s, Dec.=-36°23′22.4″) of the three Swift/XRT candidates (https://www.swift.ac.uk/ToO_GRBs/00021699/). No new optical source is detected in the stacked image at the XRT position, down to a 5-sigma limiting magnitude of R ~ 20.7, calibrated with SkyMapper stars and not corrected for Galactic extinction.
GCN 36886 table
GRB_name GRB240715A
GCN_number 36886
Detection_method Konus-Wind Det
t_trigger 5:44:05.475 UTC
Circular_text TITLE: GCN CIRCULAR NUMBER: 36886 SUBJECT: Konus-Wind detection of GRB 240715A DATE: 24/07/16 12:54:31 GMT FROM: Anna Ridnaia at Ioffe Institute A. Ridnaia, D. Frederiks, A. Lysenko, D. Svinkin, A. Tsvetkova, M. Ulanov, and T. Cline, on behalf of the Konus-Wind team, report: The short-duration GRB 240715A (Fermi-GBM detection: The Fermi GBM team, GCN 36866; de Barra & Meegan, GCN 36875; IPN triangulation: Kozyrev at al., GCN 36872; SVOM/GRM In-Flight Trigger: Huang et al., GCN 36881) triggered Konus-Wind at T0=20645.475 s UT (05:44:05.475). The burst light curve shows a single pulse, which starts at ~T0 and has a total duration of ~0.2 s. The emission is seen up to ~10 MeV. The Konus-Wind light curve of this GRB is available at http://www.ioffe.ru/LEA/GRBs/GRB240715_T20645/ As observed by Konus-Wind, the burst had a fluence of 7.00(-0.97,+1.02)x10^-6 erg/cm2, and a 16-ms peak flux, measured from T0+0.090 s, of 7.55(-1.72,+1.76)x10^-5 erg/cm2/s (both in the 20 keV - 10 MeV energy range). The time-averaged spectrum of the burst (measured from T0 to T0+0.192 s) is best fit in the 20 keV - 10 MeV range by a power law with exponential cutoff model: dN/dE ~ (E^alpha)*exp(-E*(2+alpha)/Ep) with alpha = -0.73(-0.13,+0.14) and Ep = 1740(-328,+418) keV (chi2 = 24/48 dof). Fitting by a GRB (Band) model yields the same alpha and Ep, and an upper limit on the high energy photon index: beta < -2.4 (chi2 = 24/47 dof). All the quoted errors are at the 90% confidence level. All the quoted values are preliminary.
GCN 36887 table
GRB_name GRB240715A
GCN_number 36887
Detection_method IPN Triangulation
Circular_text TITLE: GCN CIRCULAR NUMBER: 36887 SUBJECT: GRB 240715A: GECAM-C detection of a short burst DATE: 24/07/16 13:34:33 GMT FROM: wenlongzhang2018@163.com Wen-Long Zhang, Shao-Lin Xiong, Wen-Jun Tan, Ce Cai, Chen-Wei Wang, Shi-Jie Zheng, Cheng-Kui Li and Peng Zhang report on behalf of the GECAM team: GECAM-C detected a bright short burst, GRB 240715A, at 2024-07-15T05:44:03.300 UTC (T0), which was also detected by Fermi/GBM (GCN #36866), SVOM/GRM (GCN #36881), INTEGRAL/SPI-ACS (TrigID 10791), Konus-Wind (GCN #36886). The light curve of GECAM-C shows a total duration of ~0.2 sec (30-300 keV). Based on the GECAM-C data and the IPN triangulation location (GCN #36872) of this burst, the GECAM-C time-averaged spectrum from T0-0.1 to T0+0.1 could be adequately fit by a power law with high energy exponential cutoff function with a fluence of about (2.73 +0.33/-0.30) E-6 erg/cm^2 in 10-1000 keV. The power law index is -0.91 +0.11/-0.09 and the Epeak is 2105 +950/-583 keV. The GECAM-C light curve can be found here: https://twikinew.ihep.ac.cn/pubgecam/Sandbox/GRB/GRB240715A_LightCurve_v01.png We note that these results are very preliminary. Refined analysis will be reported later. Gravitational wave high-energy Electromagnetic Counterpart All-sky Monitor(GECAM) mission originally consists of two microsatellites (GECAM-A and GECAM-B) launched in Dec. 2020. As the third member of GECAM constellation, GECAM-C was launched onboard SATech-01 experimental satellite in July 2022. GECAM mission is funded by the Chinese Academy of Sciences (CAS).
GCN 36890 table
GRB_name GRB240715A
GCN_number 36890
Detection_method Swift-XRT Other
ra 5.2342°
decl -36.5445°
Circular_text TITLE: GCN CIRCULAR NUMBER: 36890 SUBJECT: GRB 240715A: Swift-XRT observations DATE: 24/07/16 15:15:05 GMT FROM: Phil Evans at U of Leicester V. D'Elia (SSDC & INAF-OAR), A. Tohuvavohu (U. Toronto), D.N. Burrows (PSU), J. D. Gropp (PSU), J.P. Osborne (U. Leicester), K.L. Page (U. Leicester), A.P. Beardmore (U. Leicester), B. Sbarufatti (INAF-OAB), C. Salvaggio (INAF-OAB) and P.A. Evans (U. Leicester) reports on behalf of the Swift-XRT team: Swift-XRT has performed follow-up observations of the IPN-detected burst GRB 240715A, collecting 4.7 ks of Photon Counting (PC) mode data between T0+36.0 ks and T0+54.3 ks. Three uncatalogued X-ray sources have been detected, however none of them is above the RASS limit or shows definitive signs of fading. Therefore, at the present time we cannot identify which, if any, is the afterglow. Details of these sources are given below: Source 1: RA (J2000): 5.2342 = 00:20:56.20 Dec (J2000): -36.5445 = -36:32:40.1 Error: 6.7 arcsec (radius, 90% conf.) Count-rate: (1.40 [+0.84, -0.62])e-3 ct s^-1 Distance: 135 arcsec from IPN position. Source 2: RA (J2000): 5.3550 = 00:21:25.20 Dec (J2000): -36.6383 = -36:38:17.9 Error: 7.8 arcsec (radius, 90% conf.) Count-rate: (1.83 [+1.05, -0.78])e-3 ct s^-1 Distance: 487 arcsec from IPN position. Flux: (3.3 [+1.9, -1.4])e-14 erg cm^-2 s^-1 (observed, 0.3-10 keV) Source 3: RA (J2000): 5.1463 = 00:20:35.12 Dec (J2000): -36.3896 = -36:23:22.4 Error: 5.5 arcsec (radius, 90% conf. [Enhanced position]) Count-rate: (4.0 [+1.4, -1.2])e-3 ct s^-1 Distance: 595 arcsec from IPN position. Flux: (6.7 [+2.3, -1.9])e-14 erg cm^-2 s^-1 (observed, 0.3-10 keV) Further analysis is ongoing. The results of the XRT-team automatic analysis of the XRT observations, including a position-specific upper limit calculator, are available at https://www.swift.ac.uk/ToO_GRBs/00021699. This circular is an official product of the Swift-XRT team.
GCN 36891 table
GRB_name GRB240715A
GCN_number 36891
Detection_method Swift-UVOT Det
Circular_text TITLE: GCN CIRCULAR NUMBER: 36891 SUBJECT: GRB 240715A: Swift/UVOT observations of the XRT sources. DATE: 24/07/16 17:17:40 GMT FROM: Samantha Oates at University of Birmingham S. R. Oates (Lancaster U.) reports on behalf of the Swift/UVOT team: The Swift/UVOT began settled observations of the field of GRB 240715A 36 ks after the Fermi/GBM trigger (Fermi GBM team, GCN Circ. 36866). The UVOT exposures include the positions of XRT sources 1 and 2, but XRT source 3 is outside of the UVOT field of view (D'Elia et al., GCN 36890). In the UVOT exposures, optical sources are found consistent with XRT source 1 and 2. These sources are also observed in the DSS. Preliminary magnitudes using the UVOT photometric system (Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for the two XRT sources are: Source Filter T_start(s) T_stop(s) Exp(s) Mag XRT source 1 white 36242 54326 4613 20.1+\-0.1 XRT source 2 white 36242 54326 4613 21.8+\-0.2 The magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.01 in the direction of the burst (Schlegel et al. 1998).
GCN 36981 table
GRB_name GRB240715A
GCN_number 36981
Detection_method Swift-XRT Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 36981 SUBJECT: GRB 240715A: Swift-XRT afterglow detection DATE: 24/07/30 16:04:49 GMT FROM: Chiara Salvaggio at INAF OABrera C. Salvaggio (INAF-OAB), K. L. Page (U. Leicester) and P.A. Evans (U. Leicester) reports on behalf of the Swift-XRT team: Swift-XRT has performed further follow-up observations of the IPN-detected burst GRB 240715A (Kozyrev et al., GCN Circ. 36872). The data were collected between T0+36.0 ks ks and T0+1270 ks, for a total exposure time of 17.7 ks. The uncatalogued X-ray source reported by D'Elia et al. ("Source 3"; GCN Circ. 36890), with a count-rate of 4.0 [+1.4, -1.2]e-3 ct s^-1, is no more detected: we derive an upper limit of 1.4e-3 ct s^-1. Source 3 shows significant signs of fading, and is therefore likely the GRB afterglow. The X-ray afterglow light curve can be modelled with a power-law with no breaks and decay index alpha > 0.63. The results of the XRT-team automatic analysis are available at https://www.swift.ac.uk/xrt_products/00021699. This circular is an official product of the Swift-XRT team.