Near Infrared Photometry of Nova Del 2013
ATel #5419; A. C. Cass, R. L. Carlon, D. T. Corgan, D. A. Dykhoff, R. D. Gehrz, R. D. and D. P. Shenoy (Minnesota Institute for Astrophysics, Minneapolis, MN, USA)
on 25 Sep 2013; 22:30 UT
Credential Certification: Robert Gehrz (gehrz@astro.umn.edu)
We continued to follow Nova Del 2013 during the period from 31.15 August 2013 UT through 25.18 September 2013 UT using an As:Si bolometer mounted on the 0.76-m infrared telescope of the University of Minnesota's O'Brien Observatory (Marine on St. Croix, Minnesota, USA). Vega (alpha Lyrae) is used as the standard star. While weather conditions have not been ideal and the nova is getting difficult to detect with our system, we can report that the spectral energy distribution generally continues to follow an optically thin free-free-slope with deviations in several filters consistent with strong superimposed line emission as reported by Banerjee et al. in ATEL #5404 . During 31.15 August 2013 UT through 17.04 September, the HKL fluxes remained approximately constant, fluctuating about the following mean values:
H = +5.6 +/- 0.2, K = +5.4 +/- 0.2, and L = +4.2 +/- 0.3.
No 3 sigma detections were obtained on 25.18 September. Upper limits set at 4.9 and 10 microns suggest that there has been no substantial dust production.
Our observations were made possible by a generous gift from Edward Glickman and technical support by A. Knutson and J. Marchetti.
