Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004atel..260....1i&link_type=abstract
The Astronomer's Telegram, #260
Astronomy and Astrophysics
Astronomy
4
Optical, X-Ray, Binaries, Neutron Stars, Transients
Scientific paper
The optical counterpart of the recurrent X-ray transient Aquila X-1 has been observed since mid-March 2004 with the Haute-Provence 1.2-m telescope and CCD camera to be in an intermediate brightness state near V = 17.5. The current low soft X-ray (2-10 keV) flux, as detected from this source by the Rossi/XTE ASM since early February (obtained from publicly available data), yields a high Optical/Soft X-ray flux ratio nearly identical with that observed during the rare 1996 "mini-outburst" event.
Chevalier Clément
Ilovaisky Sergio A.
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