[ Previous | Next | ADS ]

Observing V404 Cyg on 2015 June 22 10:49-14:49 UT

ATel #7671; G. R. Sivakoff, A. Tetarenko (Alberta), J. C. Miller-Jones (Curtin) on behalf of a large XRB collaboration
on 19 Jun 2015; 19:25 UT
Credential Certification: Gregory R Sivakoff (sivakoff@ualberta.ca)

Subjects: Radio, Millimeter, Sub-Millimeter, Far-Infra-Red, Infra-Red, Optical, Ultra-Violet, X-ray, Request for Observations

Referred to by ATel #: 7674, 7677, 7681, 7686, 7702, 7708, 7720, 7721, 7722, 7734, 7740, 7959

The black hole low-mass X-ray binary V404 Cyg is undergoing a rare exceptionally bright outburst (GCN #17929, #17931, #17933; ATel #7646, #7647; GCN #17940, ATel #7650, #7658, #7659, #7661, #7662, #7663, #7665, #7666, #7667, #7669). As part of a large X-ray binary collaboration, we have approved VLA/VLBA observing time to measure the rapid variability of the current outburst to constrain jet and accretion properties. We are aiming to be capable of measuring 1-2% variability on 2 minute timescales, which implies sensitivity to ~20-40% variability on second timescales.

We encourage a coordinated multiwavelength campaign that concentrates on rapid variability of second to 10s of minute timescales and is simultaneous, or overlaps with, our observations on 2015 June 22 10:49-14:49 UT.

We thank the VLA/VLBA for rapidly reviewing and scheduling our DDT request, and all facilities that are working to get simultaneous observations.