GRBweb by P. Coppin

This page lists all entries on GRB130528A in GRBweb

Summary Fermi GBM IPN Swift GCN 14711 GCN 14712 GCN 14714 GCN 14716 GCN 14718 GCN 14721 GCN 14722 GCN 14729

Summary table
Variable	Value	Source
GRB_name_Fermi	GRB130528695
T0	16:41:21.410 UTC	GCN_circulars,Fermi GBM Det
ra	139.5051°	Swift
decl	87.3012°	Swift
pos_error	2.46e-04°	Swift
T90	55.553 s	Fermi_GBM
T90_error	1.864 s	Fermi_GBM
T90_start	16:41:24.985 UTC	Fermi_GBM
fluence	1.11e-05 erg/cm²	Fermi_GBM
fluence_error	1.20e-07 erg/cm²	Fermi_GBM
T100	60.99 s
GBM_located	False
mjd	56440.69538668982	GCN_circulars,Fermi GBM Det

Fermi GBM table
GRB_name_Fermi	GRB130528695
trigger_name	bn130528695
ra	138.7379°
decl	87.2700°
pos_error	2.84e+00°
datum	2013-05-28
t_trigger	16:41:24.409 UTC
T90	55.553 s
T90_error	1.864 s
T90_start	16:41:24.985 UTC
fluence	1.11e-05 erg/cm²
fluence_error	1.20e-07 erg/cm²
flux_1024	5.67e+00 erg/cm²/s
flux_1024_error	2.74e-01 erg/cm²/s
flux_1024_time	3.26e+00 erg/cm²/s
flux_64	7.54e+00 erg/cm²/s
flux_64_error	1.38e+00 erg/cm²/s

IPN table
GRB_name	GRB130528A
ra	138.9125°
decl	87.2833°
pos_error	5.00e-02°

Swift table
GRB_name	GRB130528A
t_trigger	16:41:23 UTC
ra	139.5051°
decl	87.3012°
pos_error	2.46e-04°
T90	59.4 s
fluence	5.10e-06 erg/cm²

GCN 14711 table
GRB_name	GRB130528A
GCN_number	14711
Detection_method	Swift Det
t_trigger	16:41:23 UTC
ra	138.9110°
decl	87.2760°
Circular_text	TITLE: GCN CIRCULAR NUMBER: 14711 SUBJECT: GRB 130528A: Swift detection of a burst DATE: 13/05/28 16:52:12 GMT FROM: David Palmer at LANL V. D'Elia (ASDC), D. N. Burrows (PSU), C. Gronwall (PSU), J. A. Kennea (PSU), A. Y. Lien (NASA/GSFC/ORAU), F. E. Marshall (NASA/GSFC), K. L. Page (U Leicester) and D. M. Palmer (LANL) report on behalf of the Swift Team: At 16:41:23 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 130528A (trigger=556870). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 138.911, +87.276 which is RA(J2000) = 09h 15m 39s Dec(J2000) = +87d 16' 33" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed a multiple-peaked structure with a duration of about 85 sec. The peak count rate was ~5500 counts/sec (15-350 keV), at ~8 sec after the trigger. The XRT began observing the field at 16:42:28.7 UT, 64.9 seconds after the BAT trigger. Using promptly downlinked data we find a bright, fading, uncatalogued X-ray source located at RA, Dec 139.51074, 87.30239 which is equivalent to: RA(J2000) = 09h 18m 02.58s Dec(J2000) = +87d 18' 08.6" with an uncertainty of 4.1 arcseconds (radius, 90% containment). This location is 139 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 http://www.swift.ac.uk/sper. A power-law fit to a spectrum formed from promptly downlinked event data gives a column density in excess of the Galactic value (5.18 x 10^20 cm^-2, Kalberla et al. 2005), with an excess column of 1.9 (+2.14/-1.88) x 10^21 cm^-2 (90% confidence). The initial flux in the 0.1 s image was 1.20e-08 erg cm^-2 s^-1 (0.2-10 keV). UVOT took a finding chart exposure of 150 seconds with the White filter starting 75 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 100% of the XRT error circle. The typical 3-sigma upper limit has been about 19.6 mag. The 8'x8' region for the list of sources generated on-board covers 100% of the XRT error circle. The list of sources is typically complete to about 18 mag. No correction has been made for the expected extinction corresponding to E(B-V) of 0.16. Burst Advocate for this burst is V. D'Elia (delia AT asdc.asi.it). 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 14712 table
GRB_name	GRB130528A
GCN_number	14712
Detection_method	Optical
Circular_text	TITLE: GCN CIRCULAR NUMBER: 14712 SUBJECT: GRB 130528A: optical upper limit DATE: 13/05/28 19:47:10 GMT FROM: Alexei Pozanenko at IKI, Moscow A. Volnova (IKI), E. Litvinenko (UBAI), I. Molotov (KIAM), A. Pozanenko (IKI) report on behalf of larger GRB follow-up collaboration: We observed the field of GRB 130528A (D'Elia et al., GCN 14711) with 0.4-m telescope of ISON-Kitab observatory starting on May 28 (UT) 17:01:13, i.e. 20 minutes after burst trigger. We took several unfiltered images of 30 s exposure. In the first image we do not detect any source in XRT error circle (D'Elia et al., GCN 14711). A photometry is based on nearby USNO-B1.0 stars: T_start, T0+, Exposure, OT, UL (3sigma) (UT) mid, d (s) 17:01:13 0.01395 1x30 n/d 17.3 A finding chart can be found at http://grb.rssi.ru/GRB130528A/GRB130528A_Kitab_fc.png

GCN 14714 table
GRB_name	GRB130528A
GCN_number	14714
Detection_method	Swift-XRT Det
ra	139.5005°
decl	87.3010°
Circular_text	TITLE: GCN CIRCULAR NUMBER: 14714 SUBJECT: GRB 130528A: Enhanced Swift-XRT position DATE: 13/05/28 21:05:38 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 842 s of XRT Photon Counting mode data and 1 UVOT images for GRB 130528A, 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 = 139.50051, +87.30103 which is equivalent to: RA (J2000): 09h 18m 0.12s Dec (J2000): +87d 18' 03.7" with an uncertainty of 1.8 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 14716 table
GRB_name	GRB130528A
GCN_number	14716
Detection_method	Swift-XRT Other
Circular_text	TITLE: GCN CIRCULAR NUMBER: 14716 SUBJECT: GRB 130528A: Swift-XRT refined Analysis DATE: 13/05/29 04:52:07 GMT FROM: Phil Evans at U of Leicester A. Melandri (INAF-OAB), B. Sbarufatti (INAF-OAB/PSU), M.C. Stroh (PSU), D.N. Burrows (PSU), J.A. Kennea (PSU), K.L. Page (U. Leicester), C. Pagani (U. Leicester), A.P. Beardmore (U. Leicester), G. Stratta (ASDC) and V. D'Elia report on behalf of the Swift-XRT team: We have analysed 9.0 ks of XRT data for GRB 130528A (D'Elia et al. GCN Circ. 14711), from 68 s to 22.8 ks after the BAT trigger. The data comprise 842 s in Windowed Timing (WT) mode with the remainder in Photon Counting (PC) mode. The enhanced XRT position for this burst was given by Goad et al. (GCN. Circ 14714). The late-time light curve (from T0+4.9 ks) can be modelled with a power-law decay with a decay index of alpha=1.06 (+/-0.12). A spectrum formed from the WT mode data can be fitted with an absorbed power-law with a photon spectral index of 1.69 (+/-0.07). The best-fitting absorption column is 3.6 (+/-0.3) x 10^21 cm^-2, in excess of the Galactic value of 5.2 x 10^20 cm^-2 (Kalberla et al. 2005). The PC mode spectrum has a photon index of 1.92 (+/-0.15) and a best-fitting absorption column of 3.6 (+/-0.6) x 10^21 cm^-2. The counts to observed (unabsorbed) 0.3-10 keV flux conversion factor deduced from this spectrum is 4.4 x 10^-11 (6.9 x 10^-11) erg cm^-2 count^-1. A summary of the PC-mode spectrum is thus: Total column: 3.6 (+/-0.6) x 10^21 cm^-2 Galactic foreground: 5.2 x 10^20 cm^-2 Excess significance: 8.5 sigma Photon index: 1.92 (+/-0.15) If the light curve continues to decay with a power-law decay index of 1.06, the count rate at T+24 hours will be 0.013 count s^-1, corresponding to an observed (unabsorbed) 0.3-10 keV flux of 5.7 x 10^-13 (8.9 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/00556870. This circular is an official product of the Swift-XRT team.

GCN 14718 table
GRB_name	GRB130528A
GCN_number	14718
Detection_method	Swift-BAT Det
ra	139.4050°
decl	87.3000°
Circular_text	TITLE: GCN CIRCULAR NUMBER: 14718 SUBJECT: GRB 130528A: Swift-BAT refined analysis DATE: 13/05/29 11:38:26 GMT FROM: Scott Barthelmy at NASA/GSFC J. R. Cummings (GSFC/UMBC), S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC), V. D'Elia (ASDC), E. E. Fenimore (LANL), N. Gehrels (GSFC), H. A. Krimm (GSFC/USRA), A. Y. Lien (NASA/GSFC/ORAU), C. B. Markwardt (GSFC), D. M. Palmer (LANL), T. Sakamoto (AGU), G. Sato (ISAS), M. Stamatikos (OSU), J. Tueller (GSFC), T. N. Ukwatta (MSU) (i.e. the Swift-BAT team): Using the data set from T-61 to T+243 sec from the recent telemetry downlink, we report further analysis of BAT GRB 130528A (trigger #556870) (D'Elia, et al., GCN Circ. 14711). The BAT ground-calculated position is RA, Dec = 139.405, 87.300 deg, which is RA(J2000) = 09h 17m 37.2s Dec(J2000) = +87d 18' 01.5" with an uncertainty of 1.0 arcmin, (radius, sys+stat, 90% containment). The partial coding was 100%. The mask-weighted light curve shows several overlapping peaks starting at ~T+0, peaking at ~T+4 sec, and ending at ~T+80 sec. T90 (15-350 keV) is 59.4 +- 3.6 sec (estimated error including systematics). The time-averaged spectrum from T+0.12 to T+79.34 sec is best fit by a power law with an exponential cutoff. This fit gives a photon index 1.39 +- 0.19, and Epeak of 118.3 +- 79.7 keV (chi squared 42.3 for 56 d.o.f.). For this model the total fluence in the 15-150 keV band is 5.1 +- 0.2 x 10^-6 erg/cm2 and the 1-sec peak flux measured from T+6.06 sec in the 15-150 keV band is 3.0 +- 0.2 ph/cm2/sec. A fit to a simple power law gives a photon index of 1.67 +- 0.05 (chi squared 48.6 for 57 d.o.f.). 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/556870/BA/

GCN 14721 table
GRB_name	GRB130528A
GCN_number	14721
Detection_method	Swift-UVOT Other
Circular_text	TITLE: GCN CIRCULAR NUMBER: 14721 SUBJECT: GRB 130528A: Swift/UVOT Upper Limits DATE: 13/05/29 14:39:16 GMT FROM: Massimiliano de Pasquale at MSSL-UCL M. De Pasquale (MSSL-UCL) and V. D'Elia (ASDC) report on behalf of the Swift/UVOT team: The Swift/UVOT began settled observations of the field of GRB 130528A 75 s after the BAT trigger (D'Elia et al., GCN Circ. 14711). No optical afterglow consistent with the enhanced XRT position (Goad et al. GCN Circ. 14714) 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 75 225 147 >20.3 u_FC 287 537 246 >19.5 white 75 18737 1239 >21.7 v 617 11553 1245 >19.9 b 543 18247 1356 >20.8 u 287 17334 1583 >21.0 w1 667 22765 1443 >20.7 m2 641 12459 1179 >20.7 w2 592 7143 491 >20.5 The magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.16 in the direction of the burst (Schlegel et al. 1998).

GCN 14722 table
GRB_name	GRB130528A
GCN_number	14722
Detection_method	Konus-Wind Det
t_trigger	16:41:25.301 UTC
Circular_text	TITLE: GCN CIRCULAR NUMBER: 14722 SUBJECT: Konus-Wind observation of GRB 130528A DATE: 13/05/29 15:33:52 GMT FROM: Dmitry Frederiks at Ioffe Institute S. Golenetskii, R.Aptekar, D. Frederiks, E. Mazets, V. Pal'shin, P. Oleynik, M. Ulanov, D. Svinkin, and T. Cline on behalf of the Konus-Wind team, report: The long-duration GRB 130528A (Swift-BAT trigger 556870: D'Elia et al., GCN 14711; Cummings et al., GCN 14718) triggered Konus-Wind at T0=60085.301s UT (16:41:25.301). The light curve shows a pulse from ~T0-5 s to ~T0+10s, followed by weaker and softer emission out to ~T0+60s. The emission is seen up to 7 MeV. The Konus-Wind light curve of this GRB is available at http://www.ioffe.ru/LEA/GRBs/GRB130528_T60085/ As observed by Konus-Wind, the burst had a fluence of (8.0 0.7)x10-6 erg/cm2, and a 64-ms peak flux, measured from T0+0.640s, of (1.7 0.2)x10-6 erg/cm2/s (both in the 20 keV - 10 MeV energy range). The time-integrated spectrum (measured from T0 to T0+57.600 s) is best fit in the 20 keV - 15 MeV range by the cutoff power law model with the following parameters: the photon index alpha = -1.30 0.15, the peak energy Ep = 93 9 keV, chi2 = 90/98 dof. The spectrum at the maximum count rate (measured from T0+0.256 to T0+5.888 s) is best fit in the 20 keV - 15 MeV range by the GRB (Band) function with the following model parameters: the low-energy photon index alpha = -0.21 0.23, the high energy photon index beta = -2.6 0.3, the peak energy Ep = 142 14 keV, chi2 = 70/97 dof. All the quoted results are preliminary.

GCN 14729 table
GRB_name	GRB130528A
GCN_number	14729
Detection_method	Fermi GBM Det
t_trigger	16:41:21.410 UTC
Circular_text	TITLE: GCN CIRCULAR NUMBER: 14729 SUBJECT: GRB 130528A: Fermi GBM detection DATE: 13/05/30 15:42:30 GMT FROM: Peter Jenke at MSFC P. Jenke (UAH) reports on behalf of the Fermi GBM Team: "At 16:41:21.41 UT on May 28 2013, the Fermi Gamma-Ray Burst Monitor triggered and located GRB 130528A (trigger 391452087 / 130528695), which was also detected by the Swift/BAT (D'Elia et al., GCN 14711). The GBM on-ground location is consistent with the Swift position. The angle of the Fermi LAT boresight is 60 degrees from the Swift location. The GBM light curve consists of at least three peaks with a duration (T90) of about 55 s (50-300 keV). The time-averaged spectrum from T0-0.9 s to T0+58.5 s is well fit by a power law function with an exponential high-energy cutoff. The power law index is -1.12 +/- 0.04 and the cutoff energy, parameterized as Epeak, is 130 +/- 7 keV. The event fluence (10-1000 keV) in this time interval is (9.5 +/- 0.3)E-06 erg/cm^2. The 1.0-sec peak photon flux measured starting from T0+3.2 s in the 10-1000 keV band is 5.5 +/- 0.2 ph/s/cm^2. The spectral analysis results presented above are preliminary; final results will be published in the GBM GRB Catalog."