1999/09/06 by D. Grupe, H. C. Thomas, H. -C. Thomas +5 · 1 citation
Engineering · Physics and Astronomy · #Astronomical Observations and Instrumentation #Astrophysical Phenomena and Observations #Astrophysics (astro-ph) #FOS: Physical sciences #astro-ph
paper · pdf · doi:10.48550/arxiv.astro-ph/9909101
4 pages, 4 figures, the paper is also available here: http://www.xray.mpe.mpg.de/~dgrupe/research/refereed.html
arxiv created 1999/09/06 · openalex publication_date 1999/09/06 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We report the discovery of a new X-ray transient AGN, RX J1624.9+7554. This object appeared to be bright in the ROSAT All-Sky Survey, but had turned off in two pointed observations about one and a half years later. The optical identification spectrum shows a non-emission line spectrum of a spiral galaxy at z=0.064. %We will discuss several hypotheses that can explain the peculiar behaviour of %this object. We will discuss several hypotheses that can explain the peculiar behaviour of this object.