GRB 170626A: Insight-HXMT observation
Abstract
During the commissioning phase, at 2017-06-26T09:37:22.32 (T0), Insight-HXMT detected GRB 170626A (trigger ID: HEB170626400) in a routine search of the data, which was also observed by the Swift/BAT (Marshall et al. 2017, GCN 21264) and the Fermi/GBM (Hamburg et al. 2017, GCN 21266). The Insight-HXMT light curve mainly consists of several pulses with a duration (T90) of 12.1 s measured from T0-0.43 s. The 1-second peak rate, measured from T0+0.5 s, is 3275.0 cnts/sec. The total counts from this burst is 9887 counts. All measurements above are made with the CsI detectors in the energy range of about 80-840 keV. Please note that this is the deposited energy, rather than the incident photon energy. URL_LC: http://www.hxmt.org/images/GRB/HEB170626400_lc.jpg The time-averaged spectrum from T0-2.5s to T0+12.5 s is adequately fit by a Power Law model with spectral index = -1.85 +/- 0.03. The event fluence (200 -50000 keV) in this time interval is (1.86 +/- 0.09)E-05 erg/cm^2. The analysis results presented above are preliminary; final results will be published elsewhere. Insight-HXMT is the first Chinese space X-ray telescope, which was funded jointly by the China National Space Administration (CNSA) and the Chinese Academy of Sciences (CAS). More information about this telescope could be found at: http://www.hxmt.org/index.php/enhome .
- Publication:
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GRB Coordinates Network
- Pub Date:
- June 2017
- Bibcode:
- 2017GCN.21274....1X