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Title:
Aquila X-1 in activity
Authors:
Ilovaisky, S. A.; Chevalier, C.
Publication:
The Astronomer's Telegram, #1553
Publication Date:
06/2008
Origin:
ATEL
Keywords:
Optical, X-ray, Binaries, Transients
Bibliographic Code:
2008ATel.1553....1I

Abstract

CCD images of the Aquila X-1/V1333 Aql field taken with the OHP 1.2-m telescope by R.Giraud on June 3.09 UT show the optical counterpart to be bright for the first time this season, at V=17.9, or 1.3 magnitudes above the quiescent combined flux of stars 'a' and 'e' (Chevalier et al 1999, A&A, 347, L51). Publicly available real-time 2-10 keV RXTE ASM data yield a counting rate of only about 3 c/s (39 mCrab), indicating this might be another weak-activity episode (see ATEL #1232).
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Database: Astronomy
Physics
arXiv e-prints