GIT observations of the 2024 outburst of the recurrent nova M31N 2017-01e
ATel #16759; Judhajeet Basu (IIA Bengaluru), Ravi Kumar (IIT Bombay), G. C. Anupama (IIA Bengaluru), Shatakshi Chamoli (IIA Bengaluru), Sudhanshu Barway (IIA Bengaluru), Vishwajeet Swain (IIT Bombay), Varun Bhalerao (IIT Bombay), Tanishk Mohan (IIT Bombay)
on 8 Aug 2024; 14:43 UT
Distributed as an Instant Email Notice Novae
Credential Certification: Sudhanshu Barway (sudhanshu.barway@iiap.res.in)
We report the pre-discovery magnitudes of the 2024 eruption of recurrent nova M31N 2017-01e. This nova has erupted before as 2017-01e, 2019-09d, and 2022-03d (Allen W. Shafter et al 2022 Res. Notes AAS 6 241 and references therein). M31N 2017-01e has the second shortest recurrence period of 2.55 years (only after M31N 2008-12a) and was predicted to erupt in the second half of 2024 (ATel #15729).
The 2024 eruption was first reported in http://xjltp.china-vo.org/xm03jy.html . It was detected at a magnitude of ~18.4 in the clear filter on 7th Aug. ZTF also detected the object during its survey on the same day.
The recurrent nova was detected in our survey of M31 using the GROWTH-India Telescope (GIT) in the pre-discovery images on 6th Aug 2024 in both g' and r' filters. However, we are unable to confirm the exact eruption date due to observations being marred by bad weather.
The available lightcurve information is summarised below. We are continuing our optical monitoring.
Date (UT) | Filter | Mag | Observer
2024-08-06 20:05:02 | g' | 18.15 +/- 0.04 | GIT
2024-08-06 20:24:27 | r' | 18.03 +/- 0.05 | GIT
2024-08-07 09:55:12 | ZTF r | 18.29 +/- 0.06 | ZTF
2024-08-07 10:18:12 | ZTF g | 18.54 +/- 0.08 | ZTF
2024-08-07 16:36:28 | CV | 18.38 +/- 0.18 | Jingyuan Zhao
Spectroscopy and monitoring of the rapidly evolving object are encouraged.
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 the operations of the telescope. Telescope technical details are available at https://sites.google.com/view/growthindia/.
