CAL 83 detected again in X-rays, dimming in optical

Details CAL 83 detected again in X-rays, dimming in optical CAL 83 detected again in X-rays, dimming in optical

Mar 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008atel.1438....1l&link_type=abstract

The Astronomer's Telegram, #1438

Astronomy and Astrophysics

Astronomy

Optical, X-Ray, Binaries, Transients

Scientific paper

We report a detection of CAL 83 with the Swift X-ray telescope during a short exposure (490 sec) started on 2008 March 20 at 10:27 UT, with a count rate of about 0.024 ct/s, corresponding to about 15% of the normal X-ray flux of CAL 83. The latest X-ray off-state of CAL 83 was discovered with Swift on 2008 Jan 2 (Greiner et al. 2008, ATel #1357), following an increase of brightness in the optical a week earlier.

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