ROSAT Position of GRO J1744-28 and Search for Its Near-Infrared Counterpart

Details ROSAT Position of GRO J1744-28 and Search for Its Near-Infrared Counterpart ROSAT Position of GRO J1744-28 and Search for Its Near-Infrared Counterpart

Sep 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997apj...486.1013a&link_type=abstract

Astrophysical Journal v.486, p.1013

Astronomy and Astrophysics

Astronomy

6

Stars: Pulsars: Individual Alphanumeric: Gro J1744-28, Stars: Neutron, X-Rays: Stars

Scientific paper

We report the detection with ROSAT of a transient X-ray source at R.A. 17h44m33.s1 and decl. -28 deg44'29" (J2000), which we identify with the transient bursting pulsar GRO J1744-28. We have made K-band observations of the X-ray source at ESO and the US Naval Observatory, Flagstaff Station. A K-band counterpart of this transient previously identified by us on an image taken 1996 February 8 by Blanco et al. is found to be detected during only two (of seven) short exposures of which this image is composed. We cannot definitely reject the reality of this variable object but feel that it is not possible to rule out an instrumental effect. The lack of a persistent K-band counterpart of GRO J1744-28 is consistent with the idea that the low-energy emission from this object is dominated by reprocessing of X-rays in an accretion disk.

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