Near-IR photometric observations V1830 Aquilae = Nova Aquilae 2013 = PNV J19023335+0315190
ATel #6309; W. P. Varricatt, T. Carroll, S. Benigni, E. Moore (Joint Astronomy Centre, Hilo, HI, USA)
on 12 Jul 2014; 00:36 UT
Credential Certification: Watson Varricatt (w.varricatt@jach.hawaii.edu)
Subjects: Infra-Red, Cataclysmic Variable, Nova, Transient
Nova V1830 Aql was discovered in outburst by K. Itakagi on 2013 Oct 28.443 UT (CBET #3691). It was classified as a reddened Fe II-type classical nova (CBET #3691; Munari et al. 2014, MNRAS, 440, 3402).
We report here on our monitoring of V1830 Aql from March 14 to April 22 2014 UT with the 3.8-m UKIRT and WFCAM, using the near-IR filters Z, Y, J, H and K (effective wavelengths: 0.8717, 1.0305, 1.2483, 1.6313 and 2.2010 microns respectively). The nova was detected at RA=19:02:33.375, Dec=+03:15:19.24 (J2000) in our images. The closest neighbors observed in our images are located ~1.3" NW and ~1.9" SW of the nova.
Aperture photometry was performed using a 2"-diameter aperture for Z, Y, J and H images, and a 4"-diameter aperture for K (as the K-band observations were done with the telescope kept out-of-focus to avoid saturation). The K-band photometry is therefore slightly affected by the presence of the neighbors. However, the relative contribution from the neighbors is very less as the Nova is much brighter than them in K. The details of our observations, and the magnitudes derived (in the UKIRT photometric system), are given below.
No near-IR counterpart of the nova was detected in the UKIDSS JHK observations of this field performed on 20050906 UT. The IR colors of the nova show large reddening and excess. During the period of our observations, the nova exhibited minor brightening in Z and Y bands, and fading in H and K. Some of the short brightening seen were more pronounced towards shorter wavelengths.
-------------------------------------
UTDATE UT Filt. mag. error
yyyymmdd hh:mm:ss
20140314 15:38:21 K 08.149 00.014
20140314 15:39:40 H 10.795 00.005
20140314 15:41:07 J 13.594 00.018
20140314 15:42:46 Y 15.546 00.012
20140314 15:44:25 Z 17.221 00.028
20140316 15:34:53 Z 17.295 00.020
20140316 15:37:25 Y 15.567 00.012
20140316 15:39:28 J 13.562 00.008
20140316 15:40:55 H 10.776 00.007
20140316 15:43:31 K 08.083 00.015
20140317 14:54:32 Z 17.190 00.015
20140317 14:57:10 Y 15.490 00.013
20140317 14:59:13 J 13.484 00.015
20140317 15:00:41 H 10.704 00.006
20140327 15:49:10 Z 17.133 00.032
20140327 15:51:40 Y 15.436 00.011
20140327 15:53:43 J 13.663 00.006
20140327 15:55:10 H 10.838 00.025
20140327 15:57:10 K 08.128 00.016
20140328 15:45:25 Z 17.041 00.018
20140328 15:47:56 Y 15.332 00.018
20140328 15:49:59 J 13.586 00.014
20140328 15:51:25 H 10.835 00.014
20140328 15:52:57 K 08.080 00.021
20140407 14:34:48 Z 16.923 00.024
20140407 14:37:20 Y 15.284 00.021
20140407 14:39:30 J 13.592 00.025
20140407 14:40:58 H 10.898 00.008
20140407 14:43:14 K 08.198 00.024
20140411 14:00:51 Z 16.969 00.018
20140411 14:03:22 Y 15.319 00.025
20140411 14:05:24 J 13.710 00.026
20140411 14:06:52 H 10.952 00.014
20140411 14:08:33 K 08.214 00.017
20140412 14:36:29 Z 16.996 00.024
20140412 14:39:06 Y 15.245 00.016
20140412 14:41:09 J 13.670 00.017
20140412 14:42:35 H 10.947 00.010
20140412 14:44:33 K 08.212 00.020
20140414 12:29:55 K 08.239 00.029
20140414 12:33:48 Z 16.615 00.018
20140414 12:36:19 Y 14.972 00.024
20140414 12:38:27 J 13.521 00.028
20140414 12:39:57 H 10.934 00.026
20140415 12:15:02 Z 16.632 00.022
20140415 12:17:32 Y 15.062 00.017
20140415 12:19:35 J 13.528 00.021
20140415 12:21:02 H 10.943 00.021
20140415 12:23:04 K 08.257 00.020
20140422 15:04:58 Z 16.782 00.042
20140422 15:07:29 Y 15.161 00.014
20140422 15:09:32 J 13.649 00.022
20140422 15:10:58 H 10.963 00.013
20140422 15:13:18 K 08.303 00.018
Light curve: http://www.jach.hawaii.edu/UKIRT/publications/SC/V1830Aql_ATel_20140712.jpg
UKIRT is operated by the Joint Astronomy Centre, Hawaii. The data reduction was performed by the CASU.
The near-IR observations are available at: http://www.jach.hawaii.edu/UKIRT/publications/SC/V1830Aql_2014_March-April_mags_UKIRT
