Radio observations of the ultraluminous supersoft X-ray source in M101
ATel #311; M. P. Rupen (NRAO), L. O. Sjouwerman (NRAO), A. K.H. Kong (Harvard-Smithsonian Center for Astrophysics)
on 21 Jul 2004; 17:05 UT
Credential Certification: Michael P. Rupen (mrupen@nrao.edu)
Subjects: Radio, X-ray, Binary, Black Hole, Transient, Variables
We report Very Large Array (VLA) observations of the ultraluminous supersoft
X-ray source in M101, currently undergoing a strong X-ray outburst
(ATEL #305, ATEL #306). Data taken
on 21 July 2004 show no detections at 4.86 and 8.46 GHz, with nominal flux
densities at the Chandra position (ATEL #305)
of 0.093 +/- 0.033 mJy/beam and 0.007 +/- 0.025 mJy/beam respectively.
The 4.86 GHz data at this position are partially contaminated by a nearby
(14 arcseconds away) confusing source, CasHII. Removing that source, under the
assumption that it is point-like, gives a nominal flux density for the ULX
of 0.007 mJy/beam.
The raw and calibrated uv-data, together with deconvolved FITS images and
contour plots, are available at
http://www.aoc.nrao.edu/~mrupen/XRT/M101ULX/m101ulx.shtml.
The National Radio Astronomy Observatory is a facility of the National
Science Foundation operated under cooperative agreement by Associated
Universities, Inc.
Radio observations of M101 supersoft ULX outburst
