GRB140320A

This page lists all entries on GRB140320A in GRBweb

Summary Fermi GBM IPN Swift GCN 16000 GCN 16001 GCN 16010 GCN 16011 GCN 16014 GCN 16016 GCN 16018 GCN 16020 GCN 16026

Summary table
Variable Value Source
GRB_name_Fermi GRB140320092
T0 2:12:44.897 UTC Fermi_GBM
ra 281.8553° Swift
decl -11.1941° Swift
pos_error 6.34e-04° Swift
T90 2.304 s Fermi_GBM
T90_error 1.527 s Fermi_GBM
T90_start 2:12:44.897 UTC Fermi_GBM
fluence 1.02e-07 erg/cm² Fermi_GBM
fluence_error 9.71e-09 erg/cm² Fermi_GBM
T100 2.304 s
GBM_located False
mjd 56736.09218630787 Fermi_GBM
Fermi GBM table
GRB_name_Fermi GRB140320092
trigger_name bn140320092
ra 281.8600°
decl -11.1700°
pos_error 5.06e+00°
datum 2014-03-20
t_trigger 2:12:46.113 UTC
T90 2.304 s
T90_error 1.527 s
T90_start 2:12:44.897 UTC
fluence 1.02e-07 erg/cm²
fluence_error 9.71e-09 erg/cm²
flux_1024 1.33e+00 erg/cm²/s
flux_1024_error 2.27e-01 erg/cm²/s
flux_1024_time -3.84e-01 erg/cm²/s
flux_64 3.37e+00 erg/cm²/s
flux_64_error 1.01e+00 erg/cm²/s
IPN table
GRB_name GRB140320A
ra 281.6500°
decl -2.7000°
pos_error 5.00e-02°
Swift table
GRB_name GRB140320A
t_trigger 2:12:45 UTC
ra 281.8553°
decl -11.1941°
pos_error 6.34e-04°
T90 0.45 s
fluence 4.90e-08 erg/cm²
GCN 16000 table
GRB_name GRB140320A
GCN_number 16000
Detection_method Swift Det
t_trigger 2:12:45 UTC
ra 281.8570°
decl -11.1730°
Circular_text TITLE: GCN CIRCULAR NUMBER: 16000 SUBJECT: GRB 140320A: Swift detection of a burst DATE: 14/03/20 02:42:04 GMT FROM: David Palmer at LANL J. K. Cannizzo (NASA/UMBC), J. A. Kennea (PSU), A. Y. Lien (NASA/GSFC/ORAU), C. J. Mountford (U Leicester), D. M. Palmer (LANL) and B. Sbarufatti (INAF-OAB/PSU) report on behalf of the Swift Team: At 02:12:45 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 140320A (trigger=592544). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 281.857, -11.173 which is RA(J2000) = 18h 47m 26s Dec(J2000) = -11d 10' 21" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed a double-peaked structure with two peaks separated by ~140 sec and a total duration of about 150 sec. The peak count rate was ~3700 counts/sec (15-350 keV), at ~0 sec after the trigger. No source was detected in 57 s of promptly downlinked data. We are waiting for the full dataset to detect and localise the XRT counterpart. Due to partial real-time telemetry, no further information is available at this time. However the burst was also detected by the Fermi-GBM instrument, verifying its reality. More details will be available following the next ground pass telemetry dump. Burst Advocate for this burst is J. K. Cannizzo (cannizzo AT milkyway.gsfc.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/too.html.)
GCN 16001 table
GRB_name GRB140320A
GCN_number 16001
Detection_method Fermi GBM Det
t_trigger 2:12:46.110 UTC
ra 284.6000°
decl -5.0000°
Circular_text TITLE: GCN CIRCULAR NUMBER: 16001 SUBJECT: GRB 140320A: Fermi GBM observations suggest a short GRB DATE: 14/03/20 04:55:01 GMT FROM: George A. Younes at USRA/NASA/MSFC G. Younes (USRA/MSFC) and V. Connaughton (UAH) report on behalf of the Fermi GBM Team: "At 02:12:46.11 UT on 19 March 2014, the Fermi Gamma-Ray Burst Monitor Triggered and located GRB 140320A (trigger 416974369/140320092), which was also detected by Swift (Cannizzo et al. 2014, GCN 16000). The double peaked structure seen with BAT, with ~150 s separation, and reported by Cannizzo et al. is also visible with FERMI/GBM, however, a location analysis with GBM shows that the two peaks are unrelated. The first peak (trigger peak) is most likely due to a short/hard GRB located at RA~284.6 DEC~-5.0 deg, consistent with the BAT location. The second peak, 150 s after the trigger, is much softer and locates at RA~265.0 DEC~-28.0, the location of the bursting pulsar GRO J1744-28, which is currently active. Hence, we encourage multi-wavelength follow-up observations of this candidate short/hard GRB.
GCN 16010 table
GRB_name GRB140320A
GCN_number 16010
Detection_method Swift-XRT Other
ra 281.8558°
decl -11.1933°
Circular_text TITLE: GCN CIRCULAR NUMBER: 16010 SUBJECT: GRB 140320A: Swift-XRT detection of an afterglow candidate DATE: 14/03/20 19:36:01 GMT FROM: Kim Page at U.of Leicester K.L. Page, C. Pagani (U. Leicester) and J.K. Cannizzo (NASA/UMBC) report on behalf of the Swift-XRT team: We have analysed 5 ks of XRT data for GRB 140320A (Cannizzo et al. GCN Circ. 16000), from 93 s to 11.8 ks after the BAT trigger. The data are entirely in Photon Counting (PC) mode. We detect a faint, uncatalogued X-ray source with a mean count rate of (5.9 +/- 1.3) x 10^-3 count s^-1, at a position of RA, Dec = 281.85583, -11.19333, which is equivalent to RA(J2000) = 18 47 25.4 Dec(J2000) = -11 11 36.9 with an uncertainty of 5.3 arcsec (radius, 90% confidence). This is 73 arcsec from the initial BAT position, within the BAT error circle. We cannot determine at this time whether the source is fading. This circular is an official product of the Swift-XRT team.
GCN 16011 table
GRB_name GRB140320A
GCN_number 16011
Detection_method Swift-XRT Det
ra 281.8553°
decl -11.1941°
Circular_text TITLE: GCN CIRCULAR NUMBER: 16011 SUBJECT: GRB 140320A: Enhanced Swift-XRT position DATE: 14/03/20 20:29:53 GMT FROM: Kim Page at U.of Leicester K.L. Page, C. Pagani, P.A. Evans and M.R. Goad (U. Leicester) report on behalf of the Swift-XRT team: Using 715 s of XRT Photon Counting mode data and 1 UVOT images, 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 = 281.85530, -11.19412 which is equivalent to: RA (J2000): 18 47 25.27 Dec (J2000): -11 11 38.8 with an uncertainty of 4.9 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 is an official product of the Swift-XRT team.
GCN 16014 table
GRB_name GRB140320A
GCN_number 16014
Detection_method Fermi GBM Det
t_trigger 2:12:46.110 UTC
Circular_text TITLE: GCN CIRCULAR NUMBER: 16014 SUBJECT: GRB 140320A: Fermi GBM detection DATE: 14/03/20 22:12:14 GMT FROM: George A. Younes at USRA/NASA/MSFC G. Younes (USRA/MSFC), V. Connaughton (UAH), C. Meegan (UAH), and A. von Kienlin (MPE) report on behalf of the Fermi GBM Team: "At 02:12:46.11 UT on 20 March 2014, the Fermi Gamma-Ray Burst Monitor triggered and located GRB 140320A (trigger 416974369/140320092), which was also detected by Swift (Cannizzo et al. 2014, GCN 16000). The GBM on-ground location, using the Fermi GBM trigger data, is consistent with the Swift/BAT location. The angle to the Fermi LAT boresight is 24 deg. using the Swift location. The GBM light curve consists of a single pulse with a duration (T90) of 1 s (50-300 keV). The time-averaged spectrum from T0-0.32 to T0+0.704 s is well fit by a simple power law function with index of -1.5 +/- 0.1. The event fluence (10-1000 keV) in this time interval is (4.0 +/- 0.5) E-07 erg/cm^2. The 0.064-sec peak photon flux measured starting from T0-0.128 s in the 10-1000 keV band is 5.0 +/- 1.0 ph/s/cm^2. The spectral analysis results presented above are preliminary; final results will be published in the GBM GRB Catalog."
GCN 16016 table
GRB_name GRB140320A
GCN_number 16016
Detection_method Swift-XRT Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 16016 SUBJECT: GRB 140320A: Confirmation of a fading X-ray afterglow DATE: 14/03/21 10:08:11 GMT FROM: Kim Page at U.of Leicester K.L. Page, C. Pagani, P.A. Evans (U. Leicester) & J.K. Cannizzo (NASA/UMBC) report on behalf of the Swift-XRT team: We have now analysed 9.8 ks of Swift-XRT data for GRB 140320A, between 93 s and 33.5 ks after the trigger. The X-ray source given by Page, Pagani & Cannizzo in GCN Circ. 16010 has now faded, with a 3-sigma upper limit on the count rate centred at 27 ks after the trigger of 1.2 x 10^-3 count s^-1. We therefore confirm this source as the X-ray afterglow of GRB 140320A. This circular is an official product of the Swift-XRT team.
GCN 16018 table
GRB_name GRB140320A
GCN_number 16018
Detection_method Swift-UVOT Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 16018 SUBJECT: GRB 140320A: Swift/UVOT Upper Limits DATE: 14/03/21 11:18:38 GMT FROM: Samantha Oates at MSSL S. R. Oates (UCL-MSSL) and J. K. Cannizzo (NASA/UMBC) report on behalf of the Swift/UVOT team: The Swift/UVOT began settled observations of the field of GRB 140320A 3723 s after the BAT trigger (Cannizzo et al., GCN Circ. 16000). No optical afterglow consistent with the enhanced XRT position (Page et al., GCN Circ 16011) 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 v 3723 5358 393 >19.2 b 4543 10186 1149 >20.8 u 4338 5973 393 >19.7 w1 4133 5768 393 >19.8 m2 3928 5563 393 >20.0 w2 3518 5153 393 >20.2 The magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.51 in the direction of the burst (Schlegel et al. 1998).
GCN 16020 table
GRB_name GRB140320A
GCN_number 16020
Detection_method Swift-BAT Det
ra 281.8430°
decl -11.1880°
Circular_text TITLE: GCN CIRCULAR NUMBER: 16020 SUBJECT: GRB 140320A: Swift-BAT refined analysis DATE: 14/03/21 13:04:45 GMT FROM: Amy Lien at GSFC D. M. Palmer (LANL), S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC), J. K. Cannizzo (NASA/UMBC), J. R. Cummings (GSFC/UMBC), N. Gehrels (GSFC), H. A. Krimm (GSFC/USRA), A. Y. Lien (NASA/UMBC), C. B. Markwardt (GSFC), T. Sakamoto (AGU), M. Stamatikos (OSU), J. Tueller (GSFC), T. N. Ukwatta (MSU) (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 140320A (trigger #592544) (Cannizzo, et al., GCN Circ. 16000). The BAT ground-calculated position is RA, Dec = 281.843, -11.188 deg which is RA(J2000) = 18h 47m 22.4s Dec(J2000) = -11d 11' 18.5" with an uncertainty of 2.4 arcmin, (radius, sys+stat, 90% containment). The partial coding was 88%. The mask-weighted light curve shows a double short-peaked structure starts at ~T-0.1 s. The second peak starts immediately at the end of the first peak at ~T+0.3 s, and ends at ~T+0.4 s. T90 (15-350 keV) is 0.45 +- 0.07 sec (estimated error including systematics). The time-averaged spectrum from T-0.08 to T+0.44 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.24 +- 0.36. The fluence in the 15-150 keV band is 4.9 +- 1.0 x 10^-8 erg/cm2. The 1-sec peak photon flux measured from T-0.32 sec in the 15-150 keV band is 0.6 +- 0.2 ph/cm2/sec. All the quoted errors are at the 90% confidence level. As noted in the Fermi/GBM circular (Younes et al.; GCN Circ. 16001), the pulse at ~T+140 s initially reported in Cannizzo, et al. (GCN Circ. 16000) is originated from a different source, the bursting pulsar GROJ1744-28. Therefore, GRB 140320A is a short burst. The results of the batgrbproduct analysis are available at http://gcn.gsfc.nasa.gov/notices_s/592544/BA/
GCN 16026 table
GRB_name GRB140320A
GCN_number 16026
Detection_method Swift-XRT Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 16026 SUBJECT: GRB 140320A: RATIR Optical and NIR Observations DATE: 14/03/21 23:44:39 GMT FROM: Owen Littlejohns at Az State U Owen Littlejohns (ASU), Nat Butler (ASU), Alan M. Watson (UNAM), Alexander Kutyrev (GSFC), William H. Lee (UNAM), Michael G. Richer (UNAM), Chris Klein (UCB), Ori Fox (UCB), J. Xavier Prochaska (UCSC), Josh Bloom (UCB), Antonino Cucchiara (ORAU/GSFC), Eleonora Troja (GSFC), Enrico Ramirez-Ruiz (UCSC), Jos A. de Diego (UNAM), Leonid Georgiev (UNAM), Jess Gonzlez (UNAM), Carlos Romn-Ziga (UNAM), Neil Gehrels (GSFC), and Harvey Moseley (GSFC) report: We observed the field of GRB 140320A (Cannizzo, et al., GCN 16000) with the Reionization and Transients Infrared Camera (RATIR; www.ratir.org) on the 1.5m Harold Johnson Telescope at the Observatorio Astronmico Nacional on Sierra San Pedro Mrtir from 2014/03 21.42 to 2014/03 21.51 UTC (31.77 to 33.94 hours after the BAT trigger), obtaining a total of 1.40 hours exposure in the r and i bands and 0.56 hours exposure in the Z, Y, J, and H bands. For a source within the Swift-XRT error circle, in comparison with 2MASS, we obtain the following upper limits (3-sigma): r > 22.70 i > 22.38 Z > 21.23 Y > 21.27 J > 20.82 H > 20.24 These magnitudes are in the AB system and are not corrected for Galactic extinction in the direction of the GRB. We thank the staff of the Observatorio Astronmico Nacional in San Pedro Mrtir.