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JVLA detection of H1743-322 in its hard state

ATel #6502; K. P. Mooley, S. P. Tendulkar, D. J. Walton, F. Fuerst, F. A. Harrison (Caltech), J. A. Tomsick (Berkeley)
on 27 Sep 2014; 00:27 UT
Credential Certification: Kunal Mooley (kunal@astro.caltech.edu)

Subjects: Radio, Binary, Black Hole, Star, Transient, Variables

We carried out radio observations of the blackhole X-ray binary H1743-322 (IGR J17464-3213, ATel#6474) with the Jansky VLA in the X-band (8-12 GHz). The on-source observations were carried out between 2014 Sep 20, 23:56:26 UT and 2014 Sep 21, 00:18:22 UT. We detected H1743-322 (coordinates 17:46:15.61, -32:14:00.6) with the following flux densities:

 
-----------------------  
Freq    Flux             
(GHz)   (mJy)            
-----------------------  
8.5     1.045 +/- 0.015  
9.5     0.973 +/- 0.015  
10.3    0.835 +/- 0.018  
11.0    0.772 +/- 0.018  
-----------------------  
Spectral index = -1.2 +/- 0.1 
We also detect a source ~12" south of H1743-322 (coordinates 17:46:15.64 -61:14:12.1), but its association with the LMXB is unclear. We re-analyzed X-band VLA data from 29 May 2003 and we do not detect any source at this location (RMS noise of 60 microJy/beam). The current flux densities are:
 
-----------------------  
Freq    Flux             
(GHz)   (mJy)            
-----------------------  
8.5     0.241 +/- 0.015  
9.5     0.220 +/- 0.015  
10.3    0.212 +/- 0.018  
11.0    0.200 +/- 0.018  
-----------------------  
All images are shown at: http://www.tauceti.caltech.edu/kunal/atel/26Sep2014_H1743-322
Further observations are encouraged to ascertain the nature of the southern source.

The observations were carried out as part of DDT time with project code 14B-476. We thank the Jansky VLA staff for rapidly approving the request and scheduling the observations.

Radio images