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GCN Circular 33237

Subject
ZTF23aabmzlp/AT2023azs: 1.3m DFOT optical observations
Date
2023-01-30T19:26:14Z (a year ago)
From
Rahul Gupta at ARIES, India <rahulbhu.c157@gmail.com>
Rahul Gupta, Amit K. Ror, S. B. Pandey, A. Aryan, A. Ghosh, Kiran Wani,
Dimple, and K. Misra (ARIES) report:

We observed the fast optical transient ZTF23aabmzlp/AT2023azs discovery by
Zwicky Transient Facility (Andreoni et al. 2023, GCN 33229) using the 1.3m
Devasthal Fast Optical Telescope (DFOT) located at the Devasthal
observatory of Aryabhatta Research Institute of Observational Sciences
(ARIES), Nainital, India. We have taken multiple frames having an exposure
time of 120 sec in the R filter. We stacked the images after the alignment.
We clearly detected the ZTF23aabmzlp/AT2023azs in the stacked image. The
estimated preliminary magnitude is the following:


Date_Start_UT    T_start-T0 (days)  Filter  Exp time (sec)       Magnitude
==============================================================
2023-01-28 18:42:44   ~0.52           R        120 sec*10            20.21
+/- 0.07


Where T0 is the ZTF first detection time of the transient. Our optical
detection is consistent with Kumar et al. 2023, GCN 33230. The temporal
decay behaviour of ZTF23aabmzlp/AT2023azs suggests an afterglow candidate,
although multiwavelength follow-up observations are required to confirm.

The magnitude is not corrected for the Galactic extinction in the direction
of the transient. Photometric calibration is performed using the standard
stars from the USNO-B1.0 catalog.

This circular may be cited.
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