SN 2021hpr: prediscovery detection and follow-up observations
ATel #14541; D. Yu. Tsvetkov, N. N. Pavlyuk, N. P. Ikonnikova, M. A. Burlak, A. A. Belinski (Sternberg Astronomical Institute, Lomonosov Moscow State University)
on 12 Apr 2021; 15:07 UT
Credential Certification: Dmitry Tsvetkov (dmitry.tsvetkov@gmail.com)
Subjects: Optical, Supernovae
SN 2021hpr was detected in images obtained with the RC600 60-cm telescope of the Caucasian Mountain Observatory of SAI MSU in the Vgri bands on March 31.92 UT, about 8 hours earlier than the first detection reported by ZTF via TNS. The follow-up observations were carried out with the RC600 telescope in the UBVgri bands and with the 70-cm telescope of SAI MSU in Moscow in the UBVRI filters. The results are presented in the Table below:
2021 UT U B V R I g r i
Mar 31.92 19.34(06) 19.32(05) 19.23(05) 19.53(08)
Apr 05.71 16.18(03) 15.88(03) 15.87(03) 15.77(06)
Apr 07.82 15.09(04) 15.29(03) 15.27(02) 15.25(02) 15.29(02) 15.67(02)
Apr 08.78 14.71(04) 14.99(03) 15.01(02) 14.97(02) 15.03(02) 15.37(02)
Apr 09.72 14.51(06) 14.77(03) 14.80(03) 14.68(03) 14.74(06)
We continue monitoring of SN 2021hpr, which is the fourth SN Ia discovered in NGC 3147.
