Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997apj...490..823l&link_type=abstract
Astrophysical Journal v.490, p.823
Astronomy and Astrophysics
Astronomy
2
Gamma Rays: Bursts, Methods: Statistical, Ism: Supernova Remnants, Stars: Individual Alphanumeric: Sgr 1900+14
Scientific paper
The positions of the two error boxes for the soft gamma repeater (SGR) 1900+14 were determined by the "network synthesis" method, which employs observations by the Ulysses gamma-ray burst and CGRO BATSE instruments. The location of the first error box has been observed at optical, infrared, and X-ray wavelengths, resulting in the discovery of a ROSAT X-ray point source and a curious double infrared source. We have recently used the ROSAT HRI to observe the second error box to complete the counterpart search. A total of six X-ray sources were identified within the field of view. None of them falls within the network synthesis error box, and a 3 sigma upper limit to any X-ray counterpart was estimated to be 6.35 x 10-14 ergs cm-2 s-1. The closest source is ~3' away, and has an estimated unabsorbed flux of 1.5 x 10-12 ergs cm-2 s-1. Unlike the first error box, there is no supernova remnant near the second error box. The closest one, G43.9+1.6, lies ~2.dg6 away. For these reasons, we believe that the first error box is more likely to be the correct one.
Fishman Gerald
Frail Dale
Hurley Kevein
Kouveliotou Chryssa
Kulkarni Sandeep S.
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