RX J1624.9+7554: A new X-ray transient AGN
D. Grupe (1), H.-C. Thomas (2), K.M. Leighly (3) ((1) MPI fuer, extraterrestrische Physik, Garching; (2) MPI fuer Astrophysik, Garching; (3), Columbia University, New York)
TL;DR
This paper reports the discovery of RX J1624.9+7554, a transient AGN that was bright in X-ray observations but faded over time, with optical data showing a spiral galaxy without emission lines.
Contribution
It introduces a newly identified X-ray transient AGN with unusual variability and provides optical and X-ray observational data.
Findings
The AGN was bright in the ROSAT survey and faded in follow-up observations.
Optical spectrum shows a spiral galaxy without emission lines.
The transient behavior suggests unusual activity in the AGN.
Abstract
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.
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Taxonomy
TopicsAstrophysical Phenomena and Observations · Astronomical Observations and Instrumentation