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Recent NIR observations of V404 Cyg.

ATel #7751; L. Carrasco, E. Recillas, A. Porras, J. Leon-Tavares, V. Chavushyan, A. Carraminana (INAOE, Mexico)
on 2 Jul 2015; 16:02 UT
Credential Certification: LUIS CARRASCO (carrasco@inaoep.mx)

Subjects: Infra-Red, Optical, Gamma Ray, Black Hole, Transient

Referred to by ATel #: 7959

We report on NIR photometry of the black hole X-ray transient, V404 Cygni during its current outburst (GCN #17929). The source was observed on two epochs on June 29th, 2015. on MJD 2457202.8515, the flux corresponded to J = 12.535 +/- 0.02, H = 11.621 +/- 0.02 and Ks = 10.961 +/- 0.02. while on MJD 2457202.9504 the flux observed was J = 12.962 +/- 0.02, H = 12.229 +/- 0.02 and Ks = 11.603 +/- 0.02. As compared with the fluxes reported by Shaw etal, Atel #7738 for a previous observation on the same day, the object rebrigthen and fainted again in a short lapse. We plan to further monitoring this object at NIR wavelengths. Our observations are carried out with the 2.1m telescope of the Guillermo Haro Observatory operated by the National Institute for Astrophysics, Optics and Electronics (Mexico), equipped with the instrument CANICA a NIR camera. We strongly encourage further multiwavelength coverage.