GRB241002A

This page lists all entries on GRB241002A in GRBweb

Summary IPN Swift GCN 37662 GCN 37665 GCN 37666 GCN 37680 GCN 37681 GCN 37683 GCN 37705 GCN 37744

Summary table
Variable Value Source
T0 0:50:22 UTC GCN_circulars,Swift Det
ra 140.9483° Swift
decl 39.8316° Swift
pos_error 3.75e-04° Swift
GBM_located False
mjd 60585.03497685185 GCN_circulars,Swift Det
IPN table
GRB_name GRB241002A
ra 140.9542°
decl 39.8500°
pos_error 5.00e-02°
Swift table
GRB_name GRB241002A
t_trigger 0:50:22 UTC
ra 140.9483°
decl 39.8316°
pos_error 3.75e-04°
GCN 37662 table
GRB_name GRB241002A
GCN_number 37662
Detection_method Swift Det
t_trigger 0:50:22 UTC
ra 140.9550°
decl 39.8540°
Circular_text TITLE: GCN CIRCULAR NUMBER: 37662 SUBJECT: GRB 241002A: Swift detection of a burst DATE: 24/10/02 01:09:25 GMT FROM: K.L. Page at U Leicester R. Caputo (GSFC), R. Gupta (NASA GSFC), M. J. Moss (GSFC), K. L. Page (U Leicester), D. M. Palmer (LANL) and B. Sbarufatti (INAF-OAB) report on behalf of the Neil Gehrels Swift Observatory Team: At 00:50:22 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 241002A (trigger=1257556). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 140.955, +39.854 which is RA(J2000) = 09h 23m 49s Dec(J2000) = +39d 51' 15" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed a complex structure with a duration of about 20 sec. The peak count rate was ~1900 counts/sec (15-350 keV), at ~0 sec after the trigger. The XRT began observing the field at 00:52:09.0 UT, 106.1 seconds after the BAT trigger. XRT found a bright, uncatalogued X-ray source located at RA, Dec 140.9500, 39.8324 which is equivalent to: RA(J2000) = 09h 23m 48.00s Dec(J2000) = +39d 49' 56.6" with an uncertainty of 5.8 arcseconds (radius, 90% containment). This location is 78 arcseconds from the BAT onboard position, within the BAT error circle. No event data are yet available to determine the column density using X-ray spectroscopy. UVOT took a finding chart exposure of 150 seconds with the White filter starting 115 seconds after the BAT trigger. No credible afterglow candidate has been found in the initial data products. The 2.7'x2.7' sub-image processing FAILED because of no aspect solution. Data from the list of sources generated on-board are not available at this time. No correction has been made for the expected extinction corresponding to E(B-V) of 0.011. Burst Advocate for this burst is R. Caputo (regina.caputo AT nasa.gov). 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 37665 table
GRB_name GRB241002A
GCN_number 37665
Detection_method Swift-XRT Det
ra 140.9483°
decl 39.8316°
Circular_text TITLE: GCN CIRCULAR NUMBER: 37665 SUBJECT: GRB 241002A: Enhanced Swift-XRT position DATE: 24/10/02 05:11:29 GMT FROM: Phil Evans at U of Leicester J.P. Osborne, A.P. Beardmore, P.A. Evans and M.R. Goad (U. Leicester) report on behalf of the Swift-XRT team. Using 1737 s of XRT Photon Counting mode data and 3 UVOT images for GRB 241002A, 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 = 140.94825, +39.83161 which is equivalent to: RA (J2000): 09h 23m 47.58s Dec (J2000): +39d 49' 53.8" with an uncertainty of 2.9 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 37666 table
GRB_name GRB241002A
GCN_number 37666
Detection_method Optical
Circular_text TITLE: GCN CIRCULAR NUMBER: 37666 SUBJECT: GRB 241002A: 1.5m OSN optical upper limit DATE: 24/10/02 05:43:41 GMT FROM: Alberto Castro-Tirado at Inst.de Astro. de Andalucia A. Sota, S. Guziy, I. Perez-Garcia, S.-Y. Wu, M. D. Caballero-Garcia, R. Sanchez-Ramirez, A. J. Castro-Tirado (IAA-CSIC) and Y.-D. Hu (INAF-OAB), on behalf of a larger collaboration, report: Following the detection of GRB 241002A by Swift (Caputo et al. GCNC 37662), we triggered the 1.5m telescope of the Observatiorio Sierra Nevada (OSN) near Granada, Spain. Observations began on Oct 2 at 03:47 UT (~ 2.95 h post burst). No optical afterglow is detected at the coadded I-band image (4 x 600 s) within the enhanced Swift/XRT position (Osborne et al. GCNC 37665) down to 22.0 mag. We thank the staff at OSN for their excellent support.
GCN 37680 table
GRB_name GRB241002A
GCN_number 37680
Detection_method Optical
Circular_text TITLE: GCN CIRCULAR NUMBER: 37680 SUBJECT: GRB 241002A: LCOGT Optical Upper Limits DATE: 24/10/02 12:52:03 GMT FROM: Robert Strausbaugh at Eastern Illinois University R. Strausbaugh (Eastern Illinois University), A. Cucchiara (NASA) report on behalf of a larger collaboration: We observed the Swift GRB 241002A field (Caputo et al., GCN 37662) with the LCOGT 1-meter Sinistro instrument at the McDonald Observatory, Texas, USA site, on October 2, from 11:23 to 11:55 UT (corresponding to 10.55 to 11.08 hours after the GRB trigger time) with the sdss r and i filters. We performed a series of 3x300s exposures in i- and r-bands. We do not detect an uncataloged source within the enhanced Swfit XRT error region (Osborne et al., GCN 37665) in either band. This result is consistent with other optical upper limits (Sota et al., GCN 37666). The following 5-sigma upper limits are calculated using the PanSTARRS catalog as reference: r > 22.6 i > 22.2 These magnitudes are not corrected for galactic extinction.
GCN 37681 table
GRB_name GRB241002A
GCN_number 37681
Detection_method Swift-XRT Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 37681 SUBJECT: GRB 241002A: Swift-XRT refined Analysis DATE: 24/10/02 13:43:56 GMT FROM: Phil Evans at U of Leicester J.P. Osborne (U. Leicester), M. Capalbi (INAF-IASFPA), M. Perri (SSDC & INAF-OAR), V. D'Elia (SSDC & INAF-OAR), M. A. Williams (PSU), S. Dichiara (PSU), J.A. Kennea (PSU), K.L. Page (U. Leicester), A.P. Beardmore (U. Leicester) and P.A. Evans report on behalf of the Swift-XRT team: We have analysed 10 ks of XRT data for GRB 241002A, from 95 s to 38.9 ks after the BAT trigger. The data comprise 212 s in Windowed Timing (WT) mode (the first 9 s were taken while Swift was slewing) with the remainder in Photon Counting (PC) mode. The light curve can be modelled with a series of power-law decays. The initial decay index is alpha=0.8 (+1.1, -1.8). At T+122 s the decay steepens to an alpha of 5.1 (+/-0.7) before breaking again at T+268 s to a final decay with index alpha=0.57 (+0.12, -0.18). A spectrum formed from the WT mode data can be fitted with an absorbed power-law with a photon spectral index of 3.1 (+/-0.3). The best-fitting absorption column is 1.01 (+0.21, -0.19) x 10^22 cm^-2, in excess of the Galactic value of 1.4 x 10^20 cm^-2 (Willingale et al. 2013). The PC mode spectrum has a photon index of 2.1 (+0.5, -0.4) and a best-fitting absorption column of 8.6 (+4.2, -3.4) x 10^21 cm^-2. The counts to observed (unabsorbed) 0.3-10 keV flux conversion factor deduced from this spectrum is 4.3 x 10^-11 (8.8 x 10^-11) erg cm^-2 count^-1. A summary of the PC-mode spectrum is thus: Total column: 8.6 (+4.2, -3.4) x 10^21 cm^-2 Galactic foreground: 1.4 x 10^20 cm^-2 Excess significance: 4.1 sigma Photon index: 2.1 (+0.5, -0.4) If the light curve continues to decay with a power-law decay index of 0.57, the count rate at T+24 hours will be 0.011 count s^-1, corresponding to an observed (unabsorbed) 0.3-10 keV flux of 4.6 x 10^-13 (9.3 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/01257556. This circular is an official product of the Swift-XRT team.
GCN 37683 table
GRB_name GRB241002A
GCN_number 37683
Detection_method Swift-UVOT Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 37683 SUBJECT: GRB 241002A: Swift/UVOT Upper Limits DATE: 24/10/02 17:06:04 GMT FROM: Sam Shilling at Lancaster University S. P. R. Shilling (Lancaster U.), S. R. Oates (Lancaster U.), N. P. M. Kuin (UCL-MSSL) and R. Caputo (GSFC) report on behalf of the Swift/UVOT team: The Swift/UVOT began settled observations of the field of GRB 241002A 116 s after the BAT trigger (Caputo et al., GCN Circ. 37662). No optical afterglow consistent with the enhanced XRT position (Osborne et al., GCN Circ. 37665) 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 116 266 147 >19.9 white 4616 10268 1081 >21.4 v 5027 16800 1081 >19.8 b 4412 5944 292 >19.8 u 4206 5841 393 >19.6 uw1 5437 5637 197 >19.0 uw2 4822 11104 1014 >20.5 um2 5232 22035 1477 >20.3 The magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.011 in the direction of the burst (Schlegel et al. 1998).
GCN 37705 table
GRB_name GRB241002A
GCN_number 37705
Detection_method Swift-BAT Det
ra 140.9420°
decl 39.8290°
Circular_text TITLE: GCN CIRCULAR NUMBER: 37705 SUBJECT: GRB 241002A: Swift-BAT refined analysis DATE: 24/10/03 20:18:43 GMT FROM: Mike Moss at NASA GSFC T. Sakamoto (AGU), S. D. Barthelmy (GSFC), R. Caputo (GSFC), R. Gupta (GSFC), H. A. Krimm (NSF), S. Laha (GSFC/UMBC), A. Y. Lien (U Tampa), C. B. Markwardt (GSFC), M. J. Moss (GSFC), D. M. Palmer (LANL), T. Parsotan (GSFC), D. Sadaula (GSFC/UMBC) (i.e. the Swift-BAT team): Using the data set from T-239 to T+963 sec from the recent telemetry downlink, we report further analysis of BAT GRB 241002A (trigger #1257556) (Caputo, et al., GCN Circ. 37662). The BAT ground-calculated position is RA, Dec = 140.942, 39.829 deg which is RA(J2000) = 09h 23m 46.1s Dec(J2000) = +39d 49' 44.5" with an uncertainty of 1.0 arcmin, (radius, sys+stat, 90% containment). The partial coding was 69%. The mask-weighted light curve shows an overall single pulse of emission with several smaller pulses of emission that can be seen during the main emission. The T90 (15-350 keV) is 46.81 +- 10.52 sec (estimated error including systematics). The time-averaged spectrum from T-21.34 to T+44.86 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 2.02 +- 0.10. The fluence in the 15-150 keV band is 2.1 +- 0.1 x 10^-06 erg/cm2. The 1-sec peak photon flux measured from T-0.29 sec in the 15-150 keV band is 1.7 +- 0.2 ph/cm2/sec. All the quoted errors are at the 90% confidence level. The results of the batgrbproduct analysis are available at https://swift.gsfc.nasa.gov/results/batgrbcat/BAT_refined_circular/1257556
GCN 37744 table
GRB_name GRB241002A
GCN_number 37744
Detection_method Optical
Circular_text TITLE: GCN CIRCULAR NUMBER: 37744 SUBJECT: GRB 241002A: NOT optical upper limits DATE: 24/10/09 07:39:16 GMT FROM: Daniele B. Malesani at IMAPP / Radboud University Kasper E. Heintz (DAWN/NBI), Daniele B. Malesani (DAWN/NBI and Radboud Univ.) and Mikael Turkki (NOT and Univ. Helsinki) report on behalf of a larger collaboration: We observed the field of the Swift GRB 241002A (Caputo et al., GCN 37662), using the Nordic Optical Telescope (NOT) equipped with the ALFOSC camera. Observations were affected by strong winds, and the delivered seeing was mediocre (1.6-2"). Observations were carried out with mid times Oct 2.204 and Oct 2.217 UT in the SDSS r and z bands, respectively (4.07 and 4.36 hr after the trigger). No source is detected consistent with the location of the X-ray afterglow (Osborne et al., GCN 37665), down to limiting magnitudes r > 23.2 and z > 22.5 (both values in the AB system, calibrated against nearby Pan-STARRS point-like sources).