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Detection of Probable Jet Component to XTE J1752-233 with the e-EVN

ATEL # 2438; Catherine Brocksopp (MSSL), Jun Yang (JIVE), Stephane Corbel (CEA Saclay, Universite Paris Diderot), Tasso Tzioumis (ATNF), Rob Fender (University of Southampton)
on 13 Feb 2010; 21:45 UT
Password Certification: Catherine Brocksopp (

Subjects: Radio, Binaries, Black Holes, Transients

Following the reported increased radio emission of XTE J1752-233 (ATel. 2400) during its X-ray spectral softening (ATel. 2387, 2391, 2396), we have made an additional radio observation with the European VLBI Network (EVN) in real-time e-VLBI mode. A 2-hour observation on 2010 February 11 detected an 8-sigma source at 5 GHz with coordinates RA 17 52 15.064, Dec. -22 30 31.982 (to uncertainty ~2 mas). The source peak was ~2 mJy/beam using natural weighting. A likely 4-sigma secondary component was detected at a separation of 20 mas and with integrated flux density ~3 mJy. Radio monitoring with the Australia Telescope Compact Array (ATCA) is continuing. We thank the EVN PC Chair, Tiziana Venturi for prompt approval of our ToO request. e-VLBI developments in Europe were supported by the EC DG-INFSO funded Communication Network Developments project 'EXPReS' ( The European VLBI Network ( is a joint facility of European, Chinese, South African and other radio astronomy institutes funded by their national research councils.

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