Near-infrared and optical photometric observations of symbiotic star Hen 2-468
ATel #6907; Gaurava K. Jaisawal, Sachindra Naik, Kumar Venkataramani, Prahlad Epili, Blesson Mathew, Shashikiran Ganesh (Physical Research Laboratory, Ahmedabad, India)
on 13 Jan 2015; 12:01 UT
Distributed as an Instant Email Notice Transients
Credential Certification: Sachindra Naik (snaik@prl.res.in)
Subjects: Infra-Red, Optical, Binary, Cataclysmic Variable, Transient, Variables
We report the near-infrared photometric observations of the symbiotic star Hen 2-468 (V2428 Cyg) on 2014 December 23 and 24 with the 1.2 m telescope at Mt. Abu Infrared Observatory with the Near-Infrared Camera/Spectrograph that uses 1 K x 1K Hawaii array. We also observed Hen 2-468 in B & V bands on December 24 and 25 with the 50 cm telescope at Mt. Abu Infrared Observatory by using 1Kx1K Andor camera. Near-infrared and optical observations were carried out as the star was undergoing a rare and bright outburst (Munari et al. 2014; ATel #6841). The observed B & V-band magnitudes of Hen 2-468 are 14.59+/-0.35 and 13.14 +/- 0.17 (on 2014 December 24) and 14.64 +/- 0.38 and 13.03 +/- 0.09 (on 2014 December 25), respectively. These B & V-bands photometric measurements are comparable to that reported by Munari et al. 2014 (Atel #6841). The estimated J, H and Ks-band magnitudes of Hen 2-468 on 2014 December 23 and 24 are 9.28 +/- 0.04, 8.35 +/- 0.04 and 7.91 +/- 0.04, respectively. The comparison of these magnitudes with the 2MASS values ( J=9.398, H=8.314, Ks=7.949, Epoch 1998 October) shows that J magnitude is slightly brighter while H and Ks magnitudes are comparable. This indicates that though the symbiotic star Hen 2-468 was undergoing a rare and bright outburst in the optical bands, it did not show significant change in the near-infrared JHKs bands.
