A Chandra observation of a possible transient AGN/ULX pair in NGC5643

Details A Chandra observation of a possible transient AGN/ULX pair in NGC5643 A Chandra observation of a possible transient AGN/ULX pair in NGC5643

Sep 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004cxo..prop.1744g&link_type=abstract

Chandra Proposal ID #06700397

Astronomy and Astrophysics

Astronomy

Chandra Proposal Id #06700397

Scientific paper

We propose to perform a short observation (total exposure time: 7.5ks) of the nearby galaxy NGC5643. The goal of this experiment is two-fold: a) performing accurate astrometry of a serendipitous source, recently discovered by XMM-Newton 0.8' NE the Seyfert 2 active nucleus (AGN). If indeed belonging to the spiral arm of NGC5643, this source ("NGC5643 X-1") is the 3rd brightest known Ultra-Luminous X-ray source (ULX; X-ray luminosity ~4x10^40 erg/s) b) adding a point to the historical light curve of the X-ray Compton-thick AGN, and of source ``NGC~5643 X-1'', which may confirm beyond any doubts their transient nature, suggested by the comparison between the XMM-Newton and previous observations.

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