Radio holding steady in GRO J1655-40

Details Radio holding steady in GRO J1655-40 Radio holding steady in GRO J1655-40

Feb 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005atel..425....1r&link_type=abstract

The Astronomer's Telegram, #425

Astronomy and Astrophysics

Astronomy

4

Radio, Binaries, Black Holes, Transients

Scientific paper

Very Large Array (VLA) observations of the black hole X-ray binary GRO J1655-40 on Feb. 23rd (MJD 53424.6) show that the radio source seen on Feb. 20th (ATEL #419) has remained roughly constant, with flux densities of 1.53 +/- 0.07 mJy at 4.86 GHz, and 1.45 +/- 0.08 mJy at 8.46 GHz. These data, taken in much better weather conditions, show a fairly flat spectrum (flux density going as frequency to the -0.10 +/- 0.14), suggesting a very small (milliarcsecond or less) source.

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