Follow-up observations of M31 nova AT2020aapw
ATel #14228; Lucas Macri (Texas A&M University), Mario Diaz (UT-RGV), LeeAnn Capistran, Moises Castillo, Victor De los Santos, Americo Hinojosa, Abigail Martinez, Brina Martinez, Wendy Mendoza, Victor Perez, Alejandro Reyes, Emmanuel Sanchez, Martell Valencia, Katrina Webb (UT-RGV Time Domain Astronomy Group)
on 27 Nov 2020; 15:35 UT
Credential Certification: Lucas Macri (lmacri@tamu.edu)
We observed the M31 nova AT2020aapw between 2020 Nov 22.2 and 25.1 (UT) with the Cristina Torres Memorial Observatory 0.43-m telescope and a 4K CCD imager through a SDSS g filter. Observation times ranged from 15 minutes to 1 hour under clear conditions, with seeing between 2.5 and 3.2"
We carried out time-series PSF photometry with DAOPHOT/ALLFRAME (Stetson 1987, 1994). We calibrated the measurements using >850 stars in common with the Pan-STARRS DR2 photometric catalog (Magnier et al. 2020; available at MAST. The local standards spanned 13<g<18.5 and the rms of the transformation was 0.03 mag. We obtained the following measurements,
| JD | g mag | g err (stat) |
| 2459175.69200 | 18.45 | 0.07 |
| 2459176.60540 | 18.86 | 0.05 |
| 2459177.59023 | 19.33 | 0.10 |
| 2459178.59055 | 19.77 | 0.16 |
from which we derive a decay rate of 0.46±0.05 mag/day.
