No radio re-flare in XTE J1118+480
ATel #420; M. P. Rupen (NRAO/GSFC), V. Dhawan, A. J. Mioduszewski (NRAO)
on 21 Feb 2005; 20:08 UT
Credential Certification: Michael P. Rupen (mrupen@nrao.edu)
Subjects: Radio, Binary, Black Hole, Transient
We report recent radio observations of the X-ray binary XTE J1118+480,
recently reported as undergoing a second optical outburst (ATEL #412)
following a more impressive optical (ATEL #383, ATEL #386, ATEL #393, ATEL #399,
ATEL #402), X-ray (ATEL #384, ATEL #390), and radio (ATEL #385, ATEL #387,
ATEL #400, ATEL #404) flare. Very Large Array (VLA) observations taken at
the beginning of the infrared recovery, on Feb. 13th (MJD 53414.2), gave
non-detections with rms noise levels of 0.072 and 0.045 mJy/beam at 4.86 and
8.46 GHz, respectively. Observations on Feb. 20th (MJD 53421.5) also showed
no radio source, with rms noise levels of 0.061 (4.86 GHz) and 0.035
(8.46 GHz) mJy/beam. Our last detection of this source was on Feb. 6th
(MJD 53407.5), with flux densities at 4.86 and 8.46 GHz of 0.45+/-0.07
and 0.33+/-0.07 mJy, and no detection at 22.46 GHz, with an rms noise of
0.31 mJy/beam. The overall radio light curves, shown at
http://www.aoc.nrao.edu/~mrupen/XRT/X1118+480/x1118+480.shtml
show a roughly linear decay since Jan. 24th (MJD 53394). Further
observations are planned.
The National Radio Astronomy Observatory is a facility of the National
Science Foundation operated under cooperative agreement by Associated
Universities, Inc.
XTE J1118+480: radio light curves
