ROSATX‐Ray Observation of the Second Error Box for SGR 1900+14

P. Li, K. Hurley, F. Vrba, C. Kouveliotou, C. Meegan, G. Fishman, S. Kulkarni, D. Frail
1997 Astrophysical Journal  
The positions of the two error boxes for the soft gamma repeater (SGR) 1900]14 were determined by the "" network synthesis ÏÏ method, which employs observations by the Ulysses gamma-ray burst and CGRO BATSE instruments. The location of the Ðrst 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
more » ... to complete the counterpart search. A total of six X-ray sources were identiÐed within the Ðeld of view. None of them falls within the network synthesis error box, and a 3 p upper limit to any X-ray counterpart was estimated to be 6.35 ] 10~14 ergs cm~2 s~1. The closest source is D3@ away, and has an estimated unabsorbed Ñux of 1.5 ] 10~12 ergs cm~2 s~1. Unlike the Ðrst error box, there is no supernova remnant near the second error box. The closest one, G43.9]1.6, lies away. For these reasons, we believe D2¡ .6 that the Ðrst error box is more likely to be the correct one.
doi:10.1086/304910 fatcat:wwrj2et5rrbnfirrtvddzx5ufe