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Near-infrared observations of the black hole transient GRS 1716-249.

ATel #10196; Vishal Joshi, Santosh Vadwale, Shashikiran Ganesh, Aarthy E. - Physical Research Laboratory, Ahmedabad, India
on 23 Mar 2017; 03:06 UT
Credential Certification: Vishal Joshi (vjoshi@prl.res.in)

Subjects: Infra-Red, Binary, Black Hole, Transient

Referred to by ATel #: 10236, 10296, 10371

We report near-infrared photometric observations of GRS 1716-249 during the on-going outburst (ATel #9876, #9895, #10036, #10069). Observations were carried out on UT 20.99 March 2017 with the Mount Abu 1.2 meter telescope (+ PRL Near-Infrared Imager/Spectrograph). Source was observed in J, H and Ks bands for a total integration time of 15, 15 and 17.5 minutes, respectively. GRS 1716-249 is detected unambiguously in the co-added images of all bands. Derived near-infrared magnitudes are J = 14.3, H = 14.0 and Ks = 13.7 with typical errors of 0.1 magnitude. Photometric calibration was done using 2MASS field stars registered in the same frame. GRS 1716-249 is below the detection limit in the 2MASS images. This suggests that it has brightened by more than 1 magnitude in the ongoing outburst.

Optical & near-infrared follow-up observations are planned. Multi-wavelength follow-up of this source is encouraged.