AT 2020nvb (SN:)
Discovered by Koichi Itagaki: https://wis-tns.weizmann.ac.il/object/2020nvb
CCD image at https://wis-tns.weizmann.ac.il/system/files/comment_files/2020nvb_0.jpg
This transient is confimed by recent ASAS-SN Sky Patrol (Shappee et al. 2014ApJ...788...48S and Kochanek et al. 2017PASP..129j4502K) data at https://asas-sn.osu.edu/light_curves/94fac18b-4c97-45af-8989-b5b38eaca7…
gmag. 13.1 (corrected) on 2020 July 1.260 UT.
Spectroscopy and multiband photometry are required.
Thanks a lot for the comparison star sequence, Erik!
Supernova 2020nvb has been added to the International Variable Star Index:
Question: isn't the supernova really "close" to the galactic core and does that mean SN 2020nvb has to be observed at high magnification to separate it from the galactic core?
Also, is it possible to measure SN 2020 nvb and NGC 4457 together and extrapolate the supernova's brightness from initial brightness of the galaxy?
I took a second shot and was able to barely get in one two-minute exposure in V and the other in B before the weather turned bad. If anyone wants to look, I can send you the images I used.