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spectrum of sn2016fnr discovered by Ron Arbour

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Robin Leadbeater's picture
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spectrum of sn2016fnr discovered by Ron Arbour

Unfortunately I was clouded out in the days following the discovery by Ron Arbour of sn2016fnr on 29th August

https://wis-tns.weizmann.ac.il/object/2016fnr

and the type (Ia) had already been confirmed before I was able to take a spectrum last night. 

My spectrum taken at ~ mag 16 using the modified ALPY "200" however confirms with high confidence the classification of a type Ia supernova near maximum light as assessed using the supernova identification program SNID.

https://people.lam.fr/blondin.stephane/software/snid/

The attached shows my spectrum (black) overlaid on the best fit spectrum from the SNID library

Robin

Andy Wilson's picture
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spectrum of sn2016fnr discovered by Ron Arbour

That is a fabulous spectrum for such a faint target Robin. A shame you were clouded out but this is another demonstration of what you can achieve with your setup.

Andy

Robin Leadbeater's picture
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Another one - sn2016gfr

This time it is the confirming spectrum.

at2016gfr was discovered by Tim Puckett’s amateur team 6 days ago but was embedded in the host galaxy and too faint at mag 17.6 for a spectrum.

 
When I checked  on Saturday there was still no confirming spectrum but  it had brightened to around mag 16 so I was able to extract a spectrum (confirming it as a type Ia) using the modified ALPY 200 despite a full moon. Guider image and spectrum (compared with best fit from GELATO) attached
 
Cheers
Robin

Andy Wilson's picture
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sn2016gfr

Congratulations Robin. A great achievement to take the confirmation spectrum for a mag 16 supernova!

Cheers

Andy

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sn2016gfr

This is a marvellous result - well done, Robin!

All the best,

Jeremy

David Boyd's picture
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sn2016gfr

Hi Robin,

Nice work. The results you are getting with your modified Alpy will make an interesting topic for discussion at the spectroscopy workshop next month. It would be interesting to discuss with Shelyak whether they will consider making this modification an option for customers.

Cheers,

David

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Nice result Robin. You

Nice result Robin. You attending the Alpy spectro meeting next month?

Steve

Robin Leadbeater's picture
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ALPY workshop

Hi Steve,

Yes, I plan to be there

Robin