Radio detection of MAXI J1305-704 with the ATCA
ATel #4067; M. Coriat (Univ. Southampton), Jess Broderick (Univ. Southampton), Tasso Tzioumis (ATNF), R. Fender (Univ. Southampton), S. Corbel (Univ. Paris Diderot & CEA Saclay), C. Brocksopp (MSSL), Rene Breton (Univ. Southampton)
on 24 Apr 2012; 09:38 UT
Credential Certification: Mickael Coriat (mickael@coriat.eu)
Subjects: Radio, Binary, Black Hole, Neutron Star, Transient, Variables
Referred to by ATel #: 4070
Following the discovery of the new X-Ray transient MAXI J1305-704 (ATel #4024, #4030, #4034, #4035, #4044, #4060), we conducted a radio observation on 2012 April 19 (12:55-18:15 UT; MJD 56024.65) with the Australia Telescope Compact Array in the EW352 configuration (maximum baseline 4.4 km). We detect a faint radio source at the following location:
RA(J2000) = 13h 06m 55.30s
Dec(J2000) = -70d 27m 05.11s
with statistical uncertainties of 0"05 in RA and 0"07 in Dec. The position of the radio source is fully consistent with the GROND optical/NIR counterpart of MAXI J1305-704 reported on Atel #
4030.
The source is unresolved to the beamsize of 1.4 x 0.5 arcseconds (at 9 GHz), oriented 34 degrees E of N. The preliminary flux densities are 0.46 +/- 0.02 mJy at 5.5 GHz and 0.40 +/- 0.03 mJy at 9 GHz. The spectral index is alpha = -0.3 +/- 0.2 (S = k nu^+alpha). Uncertainties are given at a 1 sigma level. The derived spectral index does not allow to constrain the nature (e.g. synchrotron optically thick or thin) of the radio emission.
We thank Phil Edwards and the ATCA staff for rapidly scheduling the observation.
