GRB120324A

This page lists all entries on GRB120324A in GRBweb

Summary IPN Swift GCN 13090 GCN 13091 GCN 13092 GCN 13093 GCN 13094 GCN 13095 GCN 13096 GCN 13097 GCN 13098 GCN 13100 GCN 13101 GCN 13174 GCN 13179

Summary table
Variable Value Source
T0 5:59:10.757 UTC GCN_circulars,Konus-Wind Det
ra 291.0785° Swift
decl 24.1297° Swift
pos_error 1.81e-04° Swift
T90 118.0 s Swift
T90_start 5:59:11 UTC Swift
fluence 1.01e-05 erg/cm² Swift
T100 118.243 s
GBM_located False
mjd 56010.24943005787 GCN_circulars,Konus-Wind Det
IPN table
GRB_name GRB120324A
ra 291.0833°
decl 24.1500°
pos_error 5.00e-02°
Swift table
GRB_name GRB120324A
t_trigger 5:59:11 UTC
ra 291.0785°
decl 24.1297°
pos_error 1.81e-04°
T90 118.0 s
fluence 1.01e-05 erg/cm²
GCN 13090 table
GRB_name GRB120324A
GCN_number 13090
Detection_method Swift Det
t_trigger 5:59:11 UTC
ra 291.0840°
decl 24.1450°
Circular_text TITLE: GCN CIRCULAR NUMBER: 13090 SUBJECT: GRB 120324A: Swift detection of a burst DATE: 12/03/24 06:14:22 GMT FROM: David Palmer at LANL B.-B. Zhang (PSU), A. P. Beardmore (U Leicester), D. Grupe (PSU), C. Guidorzi (U Ferrara), E. A. Hoversten (PSU), F. E. Marshall (NASA/GSFC), D. M. Palmer (LANL) and M. H. Siegel (PSU) report on behalf of the Swift Team: At 05:59:11 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 120324A (trigger=518507). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 291.084, +24.145 which is RA(J2000) = 19h 24m 20s Dec(J2000) = +24d 08' 43" 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 90 sec. The peak count rate was ~10500 counts/sec (15-350 keV), at ~34 sec after the trigger. The XRT began observing the field at 06:00:26.4 UT, 75.1 seconds after the BAT trigger. XRT found a bright, uncatalogued X-ray source located at RA, Dec 291.0771, 24.1290 which is equivalent to: RA(J2000) = +19h 24m 18.50s Dec(J2000) = +24d 07' 44.4" with an uncertainty of 4.7 arcseconds (radius, 90% containment). This location is 61 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. The initial flux in the 2.5 s image was 1.92e-08 erg cm^-2 s^-1 (0.2-10 keV). No UVOT data are available at this time. Burst Advocate for this burst is B.-B. Zhang (bbzhang AT psu.edu). 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 13091 table
GRB_name GRB120324A
GCN_number 13091
Detection_method correction
Circular_text TITLE: GCN CIRCULAR NUMBER: 13091 SUBJECT: GRB 120324A: UVOT Finding Chart Observation DATE: 12/03/24 06:32:25 GMT FROM: Erik Hoversten at Swift/Penn State E. A. Hoversten (PSU) and B.-B. Zhang (PSU) report on behalf of the Swift/UVOT team: In response to GRB120324A (Swift/BAT trigger 518507, Zhang et al. GCN Circ. 13090) at 05:59:11 UT, UVOT took a finding chart exposure of 150 seconds with the White filter starting 84 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. Because of the density of catalogued stars, further analysis is required to report an upper limit for any afterglow in the sub-image. 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 large, but uncertain extinction expected.
GCN 13092 table
GRB_name GRB120324A
GCN_number 13092
Detection_method Optical
Circular_text TITLE: GCN CIRCULAR NUMBER: 13092 SUBJECT: GRB 120324A: Liverpool Telescope optical candidate DATE: 12/03/24 07:10:25 GMT FROM: Cristiano Guidorzi at Ferrara U,Italy C. Guidorzi (U. Ferrara), A. Melandri (INAF-OAB), report on behalf of the LJMU GRB group: The 2-m Liverpool Telescope automatically observed Swift GRB 120324A (Zhang et al. GCN Circ. 13090) on March 24, from 06:13:42 UT, corresponding to 14.5 minutes after the BAT trigger time. Within the XRT error circle we detect an uncatalogued object with 20.3 +- 0.3 mag in the r' band at the following position 19:24:18.76 +24:07:50.1 (J2000). At the moment we cannot make any statement about its possible variability. Magnitudes are calibrated against nearby USNOB-1 stars.
GCN 13093 table
GRB_name GRB120324A
GCN_number 13093
Detection_method Swift-XRT Det
ra 291.0787°
decl 24.1296°
Circular_text TITLE: GCN CIRCULAR NUMBER: 13093 SUBJECT: GRB 120324A: Enhanced Swift-XRT position DATE: 12/03/24 09:08:32 GMT FROM: Phil Evans at U of Leicester P.A. Evans, M.R. Goad, J.P. Osborne and A.P. Beardmore (U. Leicester) report on behalf of the Swift-XRT team. Using 1195 s of XRT Photon Counting mode data and 1 UVOT images for GRB 120324A, 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 = 291.07873, +24.12958 which is equivalent to: RA (J2000): 19h 24m 18.90s Dec (J2000): +24d 07' 46.5" with an uncertainty of 1.7 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 13094 table
GRB_name GRB120324A
GCN_number 13094
Detection_method Optical
Circular_text TITLE: GCN CIRCULAR NUMBER: 13094 SUBJECT: GRB 120324A: TAROT La Silla observatory optical observations DATE: 12/03/24 11:35:21 GMT FROM: Alain Klotz at CESR-CNRS Klotz A. (IRAP-CNRS-OMP), Gendre B. (ASDC/INAF-OAR), Boer M. (UNS-CNRS-OCA), Atteia J.L. (IRAP-CNRS-OMP) report: We imaged the field of GRB 120324A detected by SWIFT (trigger 518507) with the TAROT robotic telescope (D=25cm) located at the European Southern Observatory, La Silla observatory, Chile. The observations started 1.98h after the GRB trigger (it was not risen when the GRB occured). The elevation of the field increased from 11 degrees above horizon and weather conditions were good. We co-added a long series of exposures. We do not detect any OT in the XRT enhanced position (Evans et al. GCNC 13093): start end magnitude tgrb+1.98h tgrb+3.23h R > 19.7 Magnitudes were estimated with the nearby USNO-B1 stars and are not corrected for galactic dust extinction. N.B. Galactic coordinates are lon= 58.0588 lat= +4.0337 and the galactic extinction in R band is about 3 magnitudes estimated from D. Schlegel et al. 1998ApJ...500..525S. This message may be cited.
GCN 13095 table
GRB_name GRB120324A
GCN_number 13095
Detection_method Swift-UVOT Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 13095 SUBJECT: GRB 120324A: Swift/UVOT Upper Limits DATE: 12/03/24 12:36:49 GMT FROM: Samantha Oates at MSSL S. R. Oates (MSSL-UCL) and B.-B. Zhang (PSU) report on behalf of the Swift/UVOT team: The Swift/UVOT began settled observations of the field of GRB 120324A 84 s after the BAT trigger (Zhang et al., GCN Circ. 13090). No optical afterglow, consistent with the XRT position (Evans et al., GCN Circ. 13093) or the uncatalogued object reported by the Liverpool Telescope (Guidorzi et al., GCN Circ. 13092), 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 84 234 147 >21.2 u_FC 297 547 246 >20.2 white 84 4917 569 >22.1 v 627 5329 294 >19.9 b 553 1510 89 >19.6 u 297 1493 324 >20.2 w1 676 5615 171 >19.9 m2 652 5534 216 >20.0 w2 603 5124 274 >20.8 The magnitudes in the table are not corrected for the significant Galactic extinction due to the reddening of E(B-V) = 1.12 in the direction of the burst (Schlegel et al. 1998).
GCN 13096 table
GRB_name GRB120324A
GCN_number 13096
Detection_method Swift-BAT Det
ra 291.0810°
decl 24.1400°
Circular_text TITLE: GCN CIRCULAR NUMBER: 13096 SUBJECT: GRB 120324A: Swift-BAT refined analysis DATE: 12/03/24 14:25:10 GMT FROM: Scott Barthelmy at NASA/GSFC J. R. Cummings (GSFC/UMBC), S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC), E. E. Fenimore (LANL), N. Gehrels (GSFC), H. A. Krimm (GSFC/USRA), C. B. Markwardt (GSFC), D. M. Palmer (LANL), T. Sakamoto (GSFC/UMBC), G. Sato (ISAS), M. Stamatikos (OSU), J. Tueller (GSFC), T. N. Ukwatta (MSU), B.-B. Zhang (PSU) (i.e. the Swift-BAT team): Using the data set from T-239 to T+963 sec from recent telemetry downlinks, we report further analysis of BAT GRB 120324A (trigger #518507) (Zhang, et al., GCN Circ. 13090). The BAT ground-calculated position is RA, Dec = 291.081, 24.140 deg, which is RA(J2000) = 19h 24m 19.5s Dec(J2000) = +24d 08' 23.6" with an uncertainty of 1.1 arcmin, (radius, sys+stat, 90% containment). The partial coding was 82%. The mask-weighted light curve shows many overlapping peaks starting at ~T-190 sec with a weak precursor peak, the main peak at ~T+33 sec, and ending at ~T+180 sec (and possible as long as ~T+330 sec at the 2-sigma level). T90 (15-350 keV) is 118 +- 10 sec (estimated error including systematics). The time-averaged spectrum from T-150.5 to T+142.5 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.34 +- 0.04. The fluence in the 15-150 keV band is 1.01 +- 0.03 x 10^-5 erg/cm2. The 1-sec peak photon flux measured from T+33.68 sec in the 15-150 keV band is 5.9 +- 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/518507/BA/
GCN 13097 table
GRB_name GRB120324A
GCN_number 13097
Detection_method Swift-BAT Det
ra 291.0783°
decl 24.1298°
Circular_text TITLE: GCN CIRCULAR NUMBER: 13097 SUBJECT: GRB 120324A: CQUEAN rizY Observation DATE: 12/03/24 15:47:25 GMT FROM: Myungshin Im at Seoul Nat U Myungshin Im, Jae-Woo Kim, and Duho Kim (CEOU/Seoul National Univ.) We observed GRB 120324A (Zhang et al., GCN 13090) in r,i,z,Y filters using CQUEAN camera on the 2.1m Otto-Struve telescope at McDonald Observatory, Texas, US. The observation started at 2012-03-24 10:31:44 UT, or about 4.5 hours after the BAT alert. We find a faint object in i,z,Y images at the edge of the error circle of the enhanced XRT position (Evans et al. GCN 13093). The coordinate of the object is RA=19:24:18.78, Dec=24:07:47.3 (J2000) with an error of 0.7". Due to high stellar density in this field, it is not clear if this object is the optical counterpart of the GRB Further observations are planned to check the variability of this source. The finding chart of the object is available at http://astro.snu.ac.kr/~mim/grb120324a/grb120324a_cquean_i.gif We note that an optical candidate reported by Guidorzi et al. (GCN 13092) is clearly seen in both a POSS2 image retrieved from the Digitized Sky Survey and our CQUEAN images, making it less likely that the object is a GRB afterglow. We thank Karl Gebhardt and his observing team for their help with the observation.
GCN 13098 table
GRB_name GRB120324A
GCN_number 13098
Detection_method GROND
ra 291.0783°
decl 24.1298°
Circular_text TITLE: GCN CIRCULAR NUMBER: 13098 SUBJECT: GRB 120324A: GROND observations DATE: 12/03/24 15:53:34 GMT FROM: Sylvio Klose at TLS Tautenburg V. Sudilovsky (MPE Garching), A. Nicuesa Guelbenzu (TLS Tautenburg), and J. Greiner (MPE Garching) report on behalf of the GROND team: We observed the field of GRB 120324A (Swift trigger 518507; Zhang et al., GCN #13090) simultaneously in g'r'i'z'JHK with GROND (Greiner et al. 2008, PASP 120, 405) mounted at the 2.2 m MPI/ESO telescope at La Silla Observatory (Chile). Observations started at 09:04 UT, approx. 3 hrs after the GRB trigger and lasted for approx. 35 min. They were performed at an average seeing of 1.0" and at high airmass. The source reported by Guidorzi et al. (GCN #13092) is clearly detected at a constant brightness of r' = 20.3 +/- 0.2. The lack of fading and location outside the enhanced XRT error circle argue against an association with the GRB. In addition, we detect a single source at the border of the XRT error circle at coordinates RA (J2000): 19h 24m 18.80s Dec (J2000): +24d 07' 47.4" (+/- 0.5") at a brightness of r' ~ 22.6 mag. This source has an extended morphology and could be the host galaxy (see also Im et al., GCN 13097). Magnitudes have been calibrated against GROND zeropoints. We note that there is a significant Galactic foreground reddening of E(B-V) ~ 1.2 mag (Schlegel et al. 1998).
GCN 13100 table
GRB_name GRB120324A
GCN_number 13100
Detection_method Konus-Wind Det
t_trigger 5:59:10.757 UTC
Circular_text TITLE: GCN CIRCULAR NUMBER: 13100 SUBJECT: Konus-Wind observation of GRB 120324A DATE: 12/03/24 17:02:59 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 GRB 120324A (Swift-BAT trigger #518507: Zhang et al., GCN 13090; Cummings et al., GCN 13096) triggered Konus-Wind at T0=21550.757s UT (05:59:10.757) The light curve shows multiple peaks with a total burst duration of ~65 s. The emission is seen up to ~9 MeV. The Konus-Wind light curve of this GRB is available at http://www.ioffe.ru/LEA/GRBs/GRB120324_T21550/ As observed by Konus-Wind the burst had a fluence of (4.5 1.2)x10-5 erg/cm2, and a 256-ms peak flux, measured from T0+0.768 s, of (3.7 0.9)x10-6 erg/cm2/s (both in the 20 keV - 10 MeV energy range). The time-integrated spectrum of the burst (measured from T0 to T0+41.216 s) is best fitted in the 20 keV - 10 MeV range with the GRB (Band) model, for which: the low-energy photon index alpha = -1.02 (-0.10, +0.11), the high energy photon index beta = -2.3 (-1.0, +0.3), the peak energy Ep = 445(-80, +117) keV, chi2 = 82.3/86 dof. The spectrum at the maximum count rate (measured from T0 to T0+8.448 s) is best fitted is best fitted in the 20 keV - 10 MeV range with the GRB (Band) model, for which: the low-energy photon index alpha = -0.87 (-0.12, +0.15), the high energy photon index beta = -2.6 (<-2.1), the peak energy Ep = 504(-103, +135) keV, chi2 = 90.9/86 dof. All the quoted results are preliminary. All the quoted errors are at the 90% confidence level.
GCN 13101 table
GRB_name GRB120324A
GCN_number 13101
Detection_method Swift-XRT Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 13101 SUBJECT: GRB 120324A: Swift-XRT refined Analysis DATE: 12/03/24 18:14:04 GMT FROM: Phil Evans at U of Leicester B. Sbarufatti (INAF-OAB/PSU), D.N. Burrows (PSU), J.A. Kennea (PSU), M.C. Stroh (PSU), O.M. Littlejohns (U. Leicester), J.P. Osborne (U. Leicester), K.L. Page (U. Leicester), G. Stratta (ASDC), P. D'Avanzo (INAF-OAB) and B.-B. Zhang report on behalf of the Swift-XRT team: We have analysed 8.3 ks of XRT data for GRB 120324A (-B. Zhang et al. GCN Circ. 13090), from 81 s to 29.5 ks after the BAT trigger. The data comprise 160 s in Windowed Timing (WT) mode with the remainder in Photon Counting (PC) mode. The enhanced XRT position for this burst was given by Evans et al. (GCN. Circ 13093). The late-time light curve (from T0+4.7 ks) can be modelled with a power-law decay with a decay index of alpha=1.04 (+/-0.07). A spectrum formed from the WT mode data can be fitted with an absorbed power-law with a photon spectral index of 2.12 (+/-0.10). The best-fitting absorption column is 1.10 (+0.09, -0.08) x 10^22 cm^-2, in excess of the Galactic value of 4.5 x 10^21 cm^-2 (Kalberla et al. 2005). The PC mode spectrum has a photon index of 2.07 (+/-0.14) and a best-fitting absorption column of 1.18 (+0.13, -0.12) x 10^22 cm^-2. The counts to observed (unabsorbed) 0.3-10 keV flux conversion factor deduced from this spectrum is 5.7 x 10^-11 (1.3 x 10^-10) erg cm^-2 count^-1. A summary of the PC-mode spectrum is thus: Total column: 1.18 (+0.13, -0.12) x 10^22 cm^-2 Galactic foreground: 4.5 x 10^21 cm^-2 Excess significance: 9.9 sigma Photon index: 2.07 (+/-0.14) The results of the XRT-team automatic analysis are available at http://www.swift.ac.uk/xrt_products/00518507. This circular is an official product of the Swift-XRT team.
GCN 13174 table
GRB_name GRB120324A
GCN_number 13174
Detection_method Other
ra 291.0788°
decl 24.1296°
Circular_text TITLE: GCN CIRCULAR NUMBER: 13174 SUBJECT: GRB 120324A, the review of the sky area in plate archives DATE: 12/03/30 18:01:07 GMT FROM: Valentyna Golovnya at Main Astro Obs,Kyiv V.V.Golovnya (Main Astro Obs, Kyiv) report: We have undertaken the review of the sky area in vicinity of GRB 120324A (P.A. Evans et al. GCN Circ.13093) on astronegatives, collected in Ukrainian NAS Main astronomical observatory plate archive (1976-1996). All the plates with the possible object appearance are digitized using Microtek ScanMaker 9800XL TMA and Epson Expression 10000XL flatbed scanners and have been placed into Golosiiv Plate Archive database DBGPA with open access to them. The list of plates is given in the table: YYYYMMDD/TimeUT --Plates-- Exp. LimMag Star USNOA2 19880831/190518 GUA040C001326A 16.0 14.55 1125-12506783 19890803/201455 GUA040C001494A 16.0 15.65 1125-12498949 19890803/204023 GUA040C001495 16.0 15.65 1125-12498949 19910807/205429 GUA040C001847 16.0 16.40 1125-12498743 Plates: the plates archive identifier of DWA (D/F=400/2000, GUA040C M=103"/mm) of the Ukrainian NAS Main Astro obs. (Marsden's number - 83) the plate number [1]. Exp. - Duration of the maximum exposure (minutes). LimM - Limited V mag, derived in the 24 minutes area around the location given in P.A. Evans et al. GCN Circ.13093: RA(J2000)= 19h 24m 18.90s, Dec(J2000)= +24d 07' 46.5" Star USNOA2 - Comparison star. The preview images of 4 areas together with the 24x24 min.of arc area from SkyMap can be found in http://gua.db.ukr-vo.org/img/grb/120324A/index.html The images with full resolution are available via e-mail on demand. References: 1.L.Pakuliak DATABASE of GOLOSIIV PLATE ARCHIVE (DBGPA V2.0), http://gua.db.ukr-vo.org
GCN 13179 table
GRB_name GRB120324A
GCN_number 13179
Detection_method Optical
Circular_text TITLE: GCN CIRCULAR NUMBER: 13179 SUBJECT: GRB 120324A: CrAO optical upper limit DATE: 12/03/31 11:30:44 GMT FROM: Alexei Pozanenko at IKI, Moscow V. Rumyantsev, K. Antonyuk (CrAO), A. Pozanenko (IKI) report on behalf of larger GRB follow-up collaboration: We observed the field of GRB 120324A (Zhang et al., GCN 13090) with AZT-11 telescope of CrAO observatory starting on March 25 (UT) 01:46:17 under moderate weather conditions and seeing of about 2.7 arsces. Within enhanced Swift-XRT position (Evans et al., GCN 13093) we do not detected any optical source up to R=20.7. The source reported in (Guidorzi et al., GCN 13092; Im et al., GCN 13097; Sudilovsky et al., GCN 13098) is clearly detected and have a brightness R=20.16 +/-0.25. A photometry is based on the USNO-B1.0 star 1141-0365943 (19 24 20.29 +24 07 58.2) assuming R=17.07: T0+ Filter, Exposure, OT, uplim (3 sigma) (mid, d) (s) 0.8411 R 16x180 n/d 20.7