MeerKAT radio non-detection of the new transient: Swift J091211.2-274429
ATel #16711; E. Tremou (NRAO), R. Fender (University of Oxford and University of Cape Town), David Williams-Baldwin (University of Manchester), on behalf of the XKAT team.
on 16 Jul 2024; 17:58 UT
Credential Certification: Evangelia Tremou (etremou@nrao.edu)
Subjects: Radio, X-ray, Binary, Transient
Following the detection of the new X-ray transient by Swift (Atel #16702), we conducted follow-up radio observations with the MeerKAT telescope as part of the X-KAT programme. Swift J091211.2-274429 was observed on 2024-07-14 10:34:25.653 UTC (MJD 60505.44) for 15 minutes at a central frequency of 1.28 GHz (L-band), with a total bandwidth of 856 MHz. J0408-6545 was used for flux and bandpass calibration, and for complex gain calibration we used J0828-3731.
No source was detected within 10 arcsecs of the known position
RA (J2000): 09h 12m 11.12s
Dec(J2000): -27d 44m 28.1s
and we report a 3-sigma upper limit of ~64.5 μJy/beam.
Multi-wavelength observations are encouraged to follow the evolution of the outburst. Further radio observations are planned.
X-KAT is a large MeerKAT open-time programme to observe X-ray binaries in the radio band, performing weekly monitoring of bright, active systems, with capacity for higher cadence observations, and in coordination with large X-ray and optical monitoring programmes. For further information on this programme contact Rob Fender. The Swift follow-up of X-ray binaries is largely performed as part of the SwiftKAT program, which provides quasi simultaneous X-ray coverage of the X-KAT targets.
We thank the staff at the South African Radio Astronomy Observatory (SARAO) for scheduling and carrying out these observations. The MeerKAT telescope is operated by the South African Radio Astronomy Observatory (SARAO), which is a facility of the National Research Foundation, an agency of the Department of Science and Innovation.
