AMI-LA 15.5 GHz observation of the Black Hole candidate XTE J1908+094
ATel #12630; David Williams, Sara Motta, Rob Fender (Oxford), David Titterington, Dave Green (Cambridge), Yvette Perrott (VUW)
on 5 Apr 2019; 13:47 UT
Credential Certification: Sara Elisa Motta (sara.motta@physics.ox.ac.uk)
Subjects: Radio, X-ray, Binary, Black Hole, Transient
Following the detection of activity from the Black Hole candidate XTE J1908+094 with INTEGRAL (ATel #12628), we observed the source in the radio band with the Arcminute Microkelvin Imager Large Array (AMI-LA; Zwart et al. 2008; Hickish et al. 2018) at 15.5 GHz on 2019-04-05.2 for 1 hour. The custom pipeline REDUCE_DC (e.g. Perrott et al. 2015) was used to calibrate and flag the data, with 3C286 as the absolute flux calibrator and J1856+0610 as the interleaved phase calibrator.
We performed a preliminary analysis of the data and we detect a source at the phase center with peak flux density 1.66mJy/beam, consistent with being the radio counterpart to XTE J1908+094. The rms noise in the image is 0.3mJy/beam, which is significantly higher than expected due a bright contaminating radio source on the edge of the telescope primary beam.
We plan to continue monitoring this source and would like to thank the MRAO staff for carrying out these observations.
