Supernova SN 2020nlb in Messier 85: a new image after five months – 2 Feb. 2021

Five months since our last visit, we observed supernova SN 2020nlb in Messier 85 again, of course finding it much fainter than last Aug. We also updated our lightcurve.

Supernova SN 2020nlb in Messier 85: an image - 02 Feb. 2021.

Supernova SN 2020nlb in Messier 85: an image – 02 Feb. 2021.

The image above comes from the average of seven, 120-seconds exposures, unfiltered, remotely taken with the “Elena” (PlaneWave 17″+Paramount ME+SBIG STL-6303E) robotic unit available as part of the Virtual Telescope Project. The supernova candidate is indicated by an arrow, in the upper left inset. A bright Moon was rising essentially in the same part of the sky.

This is our first visit to this object after the end of Aug. 2020. The transient is now 3.5 magnitudes fainter: we’ve found it in the image above at mag. 17.6 (unfiltered, R-mags for the reference stars from the Gaia DR1 star catalogue). We closely monitored this supernova since its discovery (25 June), covering it for two months, now restaring our follow-up. We also updated its lightcurve, please find our SN 2020nlb photometry below.

SN 2020nlb: lightcurve

SN 2020nlb: lightcurve

Those are unfiltered magnitudes (R-mags for the reference stars from the Gaia DR1 star catalogue).

Of course, we plan further follow-up of this object while it will be visible.

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