Computer Science – Sound
Scientific paper
Dec 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992aas...181.2007m&link_type=abstract
American Astronomical Society, 181st AAS Meeting, #20.07; Bulletin of the American Astronomical Society, Vol. 24, p.1153
Computer Science
Sound
Scientific paper
The intense X-ray source GX340+0, a ``Z source" of characteristics similar to Sco X-1, has been observed since the sounding rockets days of X-ray astronomy, but remains optically unidentified despite an accurate X-ray position. The inferred distance of many kpc and galactic latitude of b=0(deg) imply that the counterpart may be very heavily reddened. Recently Penninx et al. (A&A, in press) have reported detection of a variable radio source associated with the X-ray object, providing a new position of subarcsecond accuracy for the system. Using IRIS at the Anglo-Australian telescope, we have obtained a series of brief K-band images of the field. We detect an unresolved IR source of K=17.3 at a position precisely coincident (<1'') with that of the radio and X-ray source; uncertainties in the radio versus IR astrometric frames dominate the measuring errors. Poor observing conditions imply that the measured flux is probably uncertain by at least +/-0.5 mag. A comparison of our measured K-band flux with that typical for Sco X-1 indicates a (highly uncertain) distance ratio of ~ 12times for GX340+0 to Sco X-1, neglecting extinction differences. Although the distances to both of these X-ray sources are highly uncertain, this plausible ratio implies that the observed IR source at GX340+0 is consistent with that expected from the simplest possible model, where all Sco-like sources have similar IR luminosity. It is likely that this infrared object is at last the counterpart of GX340+0. However, the observed surface density of faint IR sources at this low galactic latitude implies a small but non-negligible probability of a chance superposition of an unrelated object upon the X-ray/radio source. Spectral or variability observations will therefore probably be required to irrevocably confirm the identification.
Burton Michael G.
Margon Bruce
Miller Bryan
No associations
LandOfFree
The Infrared Counterpart of the Bright X-ray Source GX340+0 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with The Infrared Counterpart of the Bright X-ray Source GX340+0, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Infrared Counterpart of the Bright X-ray Source GX340+0 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1110347