GROWTH-India Telescope follow-up observations of the nova AT2022cpe in M31
ATel #15249; Judhajeet Basu (IIA), Harsh Kumar (IITB), G. C. Anupama (IIA), Sudhanshu Barway (IIA), Vishwajeet Swain (IITB), Varun Balerao (IITB), Jigmat Tstenzin (IIA), Rigzin Norbu (IIA) (on behalf of the GIT team)
on 1 Mar 2022; 04:58 UT
Distributed as an Instant Email Notice Novae
Credential Certification: Sudhanshu Barway (sudhanshu.barway@iiap.res.in)
We report the preliminary magnitudes of the nova AT2022cpe (https://www.wis-tns.org/object/2022cpe) in M31 based on observations with the 0.7m GROWTH-India Telescope (GIT).
AT2022cpe was serendipitously observed on 16 February while monitoring novae in M31. Luckily, the nova was seen in the field of view (~42 X 42 arcmin) of our observations, and this allowed us to obtain data on AT2022cpe as early as an hour from the time of discovery. AT2022cpe was observed on two more nights. The observations indicate the nova faded at a rate of ~0.5 mag/day in the gâ band and ~0.33 mag/day in the râ band.
The estimated magnitudes are as below:
JD | Filter | Magnitude (AB) +/- Error
2459627.079 | gâ | 16.11 +/- 0.02
2459627.097 | râ | 16.01 +/- 0.02
2459627.088 | iâ | 16.02 +/- 0.02
2459629.056 | gâ | 18.21 +/- 0.07
2459629.060 | râ | 17.34 +/- 0.03
2459629.105 | iâ | 17.36 +/- 0.06
2459634.083 | gâ | 19.72 +/- 0.12
2459634.091 | râ | 18.33 +/- 0.06
The magnitudes are calibrated against PanSTARRS (Flewelling et al., 2018) and not corrected for Galactic extinction.
The GROWTH India Telescope (GIT) is a 70-cm telescope with a 0.7-degree field of view, set up by the Indian Institute of Astrophysics (IIA) and the Indian Institute of Technology Bombay (IITB) with funding from DST-SERB and IUSSTF. It is located at the Indian Astronomical Observatory (Hanle), operated by IIA. We acknowledge funding by the IITB alumni batch of 1994, which partially supports operations of the telescope. Telescope technical details are available at https://sites.google.com/view/growthindia/.
