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http://hdl.handle.net/20.500.12386/24725
Title: | GRB 160712A: Swift-XRT observations | Authors: | Kennea, J. A. CUSUMANO, GIANCARLO PERRI, Matteo Evans, P. A. Osborne, J. P. Burrows, D. N. |
Issue Date: | 2016 | Journal: | GRB Coordinates Network | Number: | 19686 | First Page: | 1 | Abstract: | The XRT began observing the field of GRB 160712A at 20:47:52.7 UT, 3256.7 seconds after the BAT trigger. The position determined from promptly downlinked data differs significantly from the on-board position, suggesting that the XRT may have centroided on a cosmic ray; the initial XRT position notice should be treated with caution. Using promptly downlinked data we find an uncatalogued X-ray source with an enhanced position: RA, Dec 304.1600, -26.9582 which is equivalent to: RA(J2000) = 20h 16m 38.40s Dec(J2000) = -26d 57' 29.4" with an uncertainty of 2.1 arcseconds (radius, 90% containment). This location is 89 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 (8.30 x 10^20 cm^-2, Willingale et al. 2013), with an excess column of 2.7 (+2.97/-2.55) x 10^21 cm^-2 (90% confidence). | URI: | http://hdl.handle.net/20.500.12386/24725 | URL: | https://gcn.gsfc.nasa.gov/gcn/gcn3/19686.gcn3 | ISSN: | - | Bibcode ADS: | 2016GCN.19686....1K | Fulltext: | open |
Appears in Collections: | 4.13 Articoli in riviste non scientifiche, circolari, telegrammi |
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GRB19686.pdf | GCN Circular | 32.97 kB | Adobe PDF | View/Open |
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