Infrared Photometry of the X-ray Binary XTE J1118+480 in April 2000

Details Infrared Photometry of the X-ray Binary XTE J1118+480 in April 2000 Infrared Photometry of the X-ray Binary XTE J1118+480 in April 2000

Jan 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001astl...27...25t&link_type=abstract

Astronomy Letters, vol. 27, p. 25-28 (2001)

Astronomy and Astrophysics

Astronomy

Infrared Astronomy, X-Ray Sources, Dust Envelopes

Scientific paper

We present the IR photometry of the X-ray binary XTE J1118+480 performed during seven nights in April and two nights in May-June 2000. A significant IR excess has been detected in the object, which may be due to the thermal radiation from a dust envelope/cloud. The observed energy distribution in the range 1.25-3.5 micrometers can be interpreted in terms of the sum of the fluxes from an accretion disk with a temperature of about 20000 K and a dust envelope with grains heated to approximately 900 K. The distance to the X-ray binary estimated from the total flux from the dust envelope is no less than 0.6-3 kpc. The mean optical depth of the dust envelope for the accretion-disk radiation is about 0.06.

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