Emission-line early-type stars as possible optical counterparts of INTEGRAL hard X-ray sources IGR J08408-4503 and IGR J15539-6142

Details Emission-line early-type stars as possible optical counterparts of INTEGRAL hard X-ray sources IGR J08408-4503 and IGR J15539-6142 Emission-line early-type stars as possible optical counterparts of INTEGRAL hard X-ray sources IGR J08408-4503 and IGR J15539-6142

May 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006atel..815....1m&link_type=abstract

The Astronomer's Telegram, #815

Astronomy and Astrophysics

Astronomy

12

Optical, X-Ray, A Comment, Binaries, Transients, Stars

Scientific paper

We retrieved and analyzed ESO archival spectra of the blue supergiant star HD 74194, putatively associated with the hard X-ray source IGR J08408-4503 (Gotz et al., ATel #813; Mereghetti et al., ATel #814). The spectra were acquired on 2003 Jan 9, for a total exposure time of 10 s, under programme 70.C-0396(A) at the ESO 3.6m equipped with EFOSC, and cover the 6000-10000 Angstrom range. The analysis show the Halpha line in emission (with EW ~ 1 Angstrom) and HeI absorption lines at 6675 and 7065 Angstrom.

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