GRB 121102A

Time: 02:27:02
Trigger Number: 537266
Burst Advocate: Valerio D'Elia

BAT Data:

RA: a 270.896
Dec: a -16.951
90% Error Radius: b 1.0
T90: c 24.7
Fluence: d 19 (1)
1s Peak Photon Flux: e 2.3 (0.2)
Photon Index: f 1.88, PL (0.07)

90% error in parentheses,
a J2000; b arcmin; c seconds; d 10-7 erg/cm2 (15-150 keV); e ph/cm2/sec (15-150 keV); f PL = simple power-law, CPL = cutoff power-law (15-150 keV)

BAT Light Curve:

BAT Light Curve for GRB 121102A

XRT Data:

RA: a 18:03:36.22
Dec: a -16:57:28.4
90% Error Radius: b 1.4
Time to First Observation: c 47.73
Early Flux: d 345
11 Hour Flux: d 0.033925059
24 Hour Flux: d 0.014773659
Initial Temporal Index: -3.296
Spectral Index (Gamma): 1.77855
Column Density (NH): e 8.00045

Note: Please be aware that only the very basic temporal and spectral quantities are reported here. You are strongly encouraged to see the referenced GCN circulars for full details.
a J2000; b arcsec; c seconds; d 10-11 erg/cm2/s (0.3-10 keV); e 1021 cm-2

» XRT GRB Live Catalogue
» XRT Light Curves
» XRT Spectra

UVOT Data:

RA: a n/a
Dec: a n/a
90% Error Radius: b n/a
Time to First Observation: c 58
V Magnitude: V>20.0
Other Filter Magnitudes: B>21.4

a J2000; b arcsec; c seconds

Other Burst Info:

Host Galaxy:
Other Observatory Detections:


This event has all appearances of a GRB: hard BAT spectrum, bright XRT initial detection and fading. Still, we note that the galactic coordinates are l=12 deg, b=2.5 deg, consistent with a galactic origin. We believe it is a GRB, but can not rule out a new galactic transient.
UVOT: no detection


BAT: GCN 13938; GCN 13942
XRT: GCN 13938; GCN 13943; GCN 13945; Evans et al., 2009, MNRAS, 397, 1177
UVOT: GCN 13938; GCN 13948
Other: GCN Report 401.1