GRB080218A

This page lists all entries on GRB080218A in GRBweb

Summary IPN Swift GCN 7313 GCN 7317

Summary table
Variable Value Source
T0 20:08:42 UTC GCN_circulars,Swift Det
ra 355.9410° Swift
decl 12.1590° Swift
pos_error 1.94e-02° Swift
T90 27.6 s Swift
T90_start 20:08:42 UTC Swift
fluence 6.30e-07 erg/cm² Swift
T100 27.6 s
GBM_located False
mjd 54514.839375 GCN_circulars,Swift Det
IPN table
GRB_name GRB080218A
ra 355.9208°
decl 12.1667°
pos_error 5.00e-02°
Swift table
GRB_name GRB080218A
t_trigger 20:08:42 UTC
ra 355.9410°
decl 12.1590°
pos_error 1.94e-02°
T90 27.6 s
fluence 6.30e-07 erg/cm²
GCN 7313 table
GRB_name GRB080218A
GCN_number 7313
Detection_method Swift Det
t_trigger 20:08:42 UTC
ra 355.9220°
decl 12.1750°
Circular_text TITLE: GCN CIRCULAR NUMBER: 7313 SUBJECT: GRB 080218: Swift detection of a burst DATE: 08/02/18 20:18:57 GMT FROM: Scott Barthelmy at NASA/GSFC H. Ziaeepour (UCL-MSSL), S. D. Barthelmy (GSFC), J. R. Cummings (NASA/UMBC), P. A. Evans (U Leicester), S. T. Holland (CRESST/USRA/GSFC), J. A. Kennea (PSU), W. B. Landsman (NASA/GSFC), K. M. McLean (GSFC/UMD), C. Pagani (PSU), D. M. Palmer (LANL), T. Sakamoto (NASA/UMBC), G. Sato (GSFC/ISAS), M. Stamatikos (NASA/ORAU), D. E. Vanden Berk (PSU), L. Vetere (PSU) and P. A. Ward (MSSL-UCL) report on behalf of the Swift Team: At 20:08:42 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 080218 (trigger=303609). Swift did not slew to the burst location because of the Sun observing constraint (34 deg from the Sun). The BAT on-board calculated location is RA, Dec 355.922, +12.175 which is RA(J2000) = 23h 43m 41s Dec(J2000) = +12d 10' 29" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve shows a weak peak around T_0. The peak count rate was ~400 counts/sec (15-350 keV). Because this burst is in the Sun constraint until May, no XRT or UVOT data will be available. Burst Advocate for this burst is H. Ziaeepour (hz AT mssl.ucl.ac.uk). 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 7317 table
GRB_name GRB080218A
GCN_number 7317
Detection_method Swift-BAT Det
ra 355.9410°
decl 12.1590°
Circular_text TITLE: GCN CIRCULAR NUMBER: 7317 SUBJECT: GRB 080218A, Swift-BAT refined analysis DATE: 08/02/19 03:24:29 GMT FROM: Takanori Sakamoto at NASA/GSFC E. Fenimore (LANL), S. D. Barthelmy (GSFC), J. Cummings (GSFC/UMBC), N. Gehrels (GSFC), H. Krimm (GSFC/USRA), C. Markwardt (GSFC/UMD), K. McLean (GSFC/UMD), D. Palmer (LANL), A. Parsons (GSFC), T. Sakamoto (GSFC/UMBC), G. Sato (GSFC/ISAS), M. Stamatikos (GSFC/ORAU), J. Tueller (GSFC), T. Ukwatta (GWU), H. Ziaeepour (UCL-MSSL) (i.e. the Swift-BAT team): Using the data set from T-239 to T+303 sec from the recent telemetry downlink, we report further analysis of BAT GRB 080218A (trigger #303609) (Ziaeepour, et al., GCN Circ. 7313). The BAT ground-calculated position is RA, Dec = 355.941, 12.159 deg which is RA(J2000) = 23h 43m 45.8s Dec(J2000) = 12d 9' 34" with an uncertainty of 2.5 arcmin, (radius, sys+stat, 90% containment). The partial coding was 21%. The mask-weighted light curve shows three peaks at T-12 sec, T+0 sec, and T+9 sec. T90 (15-350 keV) is 27.6 +- 5.9 sec (estimated error including systematics). The time-averaged spectrum from T-12.8 to T+18.6 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 2.34 +- 0.35. The fluence in the 15-150 keV band is 6.3 +- 1.4 x 10^-07 erg/cm2. The 1-sec peak photon flux measured from T+1.22 sec in the 15-150 keV band is 1.4 +- 0.4 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/303609/BA/