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SN 2021aefx in NGC 1566 (Dorado)

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Robin Leadbeater's picture
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SN 2021aefx in NGC 1566 (Dorado)

https://www.wis-tns.org/object/2021aefx

A potentially bright supernova in a nearby galaxy for southerly observers (or those with robotic telescope access) to keep an eye on perhaps. Caught early so currently quite faint. The sub type is unclear from the initial spectrum but in the absence of IS extinction a type Ia could potentially reach as bright as mag 11 if the distance (10 Mpc but with high uncertainty) in NED is correct.

Cheers

Robin

Robin Leadbeater's picture
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confirmed as Ia

Now confirmed spectroscopically as Ia, by ePESTO and by the amateur 2SPOT team using their remote ALPY600 spectrograph in Chile  (Image and spectrum on ARAS forum)

The spectrum does not look obviously reddened so it may be heading for being one of the brightest SN for some time

Cheers

Robin

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SN in Dorado

I'll give it a go from Slooh Chile tonight

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SN 2021aefx

Here is an image from last night from SLOOH Chile 2. The marked star corresponds to the SN coordinates

Robin Leadbeater's picture
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still on the rise

Eyeballing it from the image it looks slightly brighter than the star above it on the top edge of the frame which is V mag 13.7 (APASS)

Putting the 2SPOT spectrum through the SNID supernova identification program estimates that it was ~11 days from maximum then so possibly maximum around 25th? Plenty of time to go yet. 

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SN 2021aefx

Plenty of images being taken on SLOOH Chile telescopes tonight by users.

I make is 13.5 CV in the image

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reached maximum early ?

According to this tweet from the ASSAS-SN team it may have topped out early at just mag 12.9 

Robin