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Near infrared photometric observations of Nova Mon 2012

ATel #4907; W. P. Varricatt, J. Ehle, T. Wold, T. Carroll (Joint Astronomy Centre, Hilo, HI, USA), D. P. K. Banerjee, N. M. Ashok (Physical Research Laboratory, Ahmedabad, India)
on 22 Mar 2013; 02:56 UT
Credential Certification: Watson Varricatt (w.varricatt@jach.hawaii.edu)

Subjects: Infra-Red, Cataclysmic Variable, Nova, Transient

We report on our monitoring observations of Nova Mon 2012 with the United Kingdom Infrared Telescope (UKIRT), and the UKIRT Wide Field Camera (WFCAM), using the MKO filters Z, Y, J, H and K (effective wavelengths: 0.872, 1.031, 1.248, 1.631 and 2.201 microns respectively). Our initial set of monitoring observations were published in ATel #4572.

The nova is associated with a gamma ray transient (ATel #4224), detection at mm and cm wavelengths (ATel #4376, #4408), a variable soft X-ray source (ATel #4727, #4845), and exhibits a 7.1-hr short-term variability at X-ray, UV and optical wavelengths (Atel #4727, #4737, #4803)

Near-IR spectroscopic observations (ATel #4542, #4764) show that the nova has evolved into the coronal phase, and is showing broad double-peaked emission lines.

During the period of our monitoring covered in ATel #4572 and this work (from 20120929 to 20130105), the source declined by 1.6 and 3.1 magnitudes respectively in K and Z bands. The source is becoming redder as its monitoring brightness declines.

 
-------------------------------- 
UTDate UT      Filt. mag. error 
mmdd   hh:mm:ss         
 
Year=2012 
1108  15:14:03  Y   9.292 0.017 
1108  15:15:27  Z   9.871 0.018 
1113  15:24:17  K   8.125 0.012 
1113  15:25:18  H   8.926 0.020 
1113  15:26:17  J   9.025 0.015 
1113  15:27:17  Y   9.340 0.019 
1113  15:28:18  Z   9.942 0.018 
1116  12:34:05  K   8.166 0.018 
1116  12:35:08  H   8.981 0.012 
1116  12:36:07  J   9.111 0.010 
1116  12:37:06  Y   9.425 0.007 
1116  12:38:06  Z  10.040 0.024 
1117  12:21:02  J   9.139 0.020 
1117  12:22:03  Y   9.461 0.037 
1125  12:23:07  K   8.306 0.015 
1125  12:24:09  H   9.114 0.012 
1125  12:25:09  J   9.263 0.017 
1125  12:26:24  Y   9.573 0.010 
1125  12:27:28  Z  10.212 0.009 
1127  16:07:07  Y   9.625 0.020 
1127  16:08:12  Z  10.271 0.014 
1129  14:53:02  K   8.392 0.046 
1129  14:55:11  H   9.209 0.046 
1129  14:55:11  J   9.389 0.037 
1129  14:56:10  Y   9.683 0.036 
1129  14:57:18  Z  10.305 0.025 
1205  12:48:12  J   9.450 0.013 
1205  12:49:12  Y   9.759 0.009 
1205  12:50:12  Z  10.386 0.019 
1208  15:26:48  K   8.550 0.037 
1208  15:27:49  H   9.354 0.024 
1208  15:28:49  J   9.539 0.035 
1208  15:29:50  Y   9.820 0.010 
1210  12:45:29  K   8.541 0.015 
1210  12:46:30  H   9.380 0.005 
1210  12:47:32  J   9.533 0.007 
1210  12:48:32  Y   9.848 0.011 
1210  12:49:33  Z  10.501 0.014 
1211  08:19:47  K   8.581 0.018 
1211  08:20:46  H   9.439 0.026 
1211  08:21:46  J   9.578 0.017 
1211  08:22:45  Y   9.907 0.011 
1211  08:23:45  Z  10.600 0.014 
1215  09:17:06  K   8.654 0.018 
1215  09:18:04  H   9.505 0.024 
1215  09:19:06  J   9.656 0.019 
1215  09:19:06  Y   9.966 0.007 
1215  09:19:06  Z  10.632 0.009 
1216  10:28:04  K   8.678 0.019 
1216  10:29:04  H   9.534 0.008 
1216  10:30:04  J   9.684 0.011 
1216  10:31:05  Y  10.005 0.011 
1216  10:32:05  Z  10.685 0.016 
1217  15:04:39  K   8.694 0.009 
1217  15:05:40  H   9.555 0.017 
1217  15:06:41  J   9.692 0.013 
1217  15:07:46  Y  10.028 0.014 
1217  15:08:46  Z  10.679 0.017 
1223  13:46:39  K   8.775 0.015 
1223  13:47:42  H   9.631 0.016 
1223  13:48:43  J   9.790 0.014 
1223  13:49:44  Y  10.111 0.015 
1223  13:50:44  Z  10.798 0.019 
 
Year=2013 
0102  09:44:58  K   8.938 0.017 
0102  09:45:56  H   9.777 0.008 
0102  09:46:56  J   9.960 0.007 
0102  09:47:57  Y  10.249 0.026 
0102  09:48:56  Z  10.926 0.020 
0105  08:06:14  K   8.964 0.016 
0105  08:07:14  H   9.829 0.007 
0105  08:08:15  J   9.982 0.020 
0105  08:09:16  Y  10.309 0.020 
0105  08:10:16  Z  10.967 0.037 
-------------------------------- 

Light curve: http://www.jach.hawaii.edu/UKIRT/publications/SC/NovaMon2012_mag_Atel_20130322.jpg

Color curve: http://www.jach.hawaii.edu/UKIRT/publications/SC/NovaMon2012_col_ATel_20130322.jpg

UKIRT is operated by the Joint Astronomy Centre on behalf of the UK-STFC. The data reduction is performed by the Cambridge Astronomy Survey Unit.

The near-IR observations are available at: http://www.jach.hawaii.edu/UKIRT/publications/SC/NovaMon2012_mags_UKIRT