Super Nova 2020 hvf in NGC 3643

[Eric Watkins]

I just managed to catch Callum Potter’s email circulation of  this evening  for   SN2020hvf in NGC 3643 (Leo).

It wasn’t at all clear with high drifting cloud cover, however I managed to image the supernova.  Seeing   was poor through clouds and unable to get a good focus. 

Attachments:

1. 

   SN_-2020-hvf-_-NGC-3643-_2020-05-10.jpg
   

[Robin Leadbeater]

This is an interesting one. It was discovered very early back on 21st April and is just hitting maximum light now. I took a spectrum on 27th April but could not then get a good match using the SNID classification software I usually use, possibly because it does not have many early spectra to compare with. Current spectra give a good match to type Ia now though and the brightness is bang on where it should be for a type Ia. Here is my spectrum (also in the BAA database as usual) and there is a more current spectrum here on the ARAS forum

http://www.spectro-aras.com/forum/viewtopic.php?f=38&t=2519

Cheers

Robin

 

[Mark Phillips]

I managed a couple of frames last night too and ran it through Muniwin (inexpertly!) and got 12.4 using a TR filter.

[David Boyd]

This spectrum of type 1a supernova SN2020hvf was taken on 11 May with a LISA spectrograph (R~1100) on a C11 and has been calibrated in absolute flux using a V magnitude of V=12.67 measured concurrently with the spectrum using another scope. The spectrum has been smoothed with a Gaussian factor 2.5.
The blue-shifted location at 6118A of the prominent Si II 6355A absorption feature indicates an expansion velocity of ~11,200 km/s.
David

[David Strange]

Thanks for the heads up! I caught a spectrum of it last night with an SA100 & C9 30x30s exp.Rotated image 90 deg to avoid galaxy: Think I’ve caught the Si II absorption line at 6127A. Cheers, David

[Eric Walker]

A tricky capture for me – very late to reach darkness at this latitude now (57°N) so object was getting low into the “murk” and skipping the treeline on my WSW horizon.  Managed to catch it as it passed through a gap in the trees and happy enough with the final result.

Eric

Beinn View Observatory, Conon Bridge, Scottish Highlands

[Dr Paul Leyland]

Nice!

[Author]

Posts