Bon Anniversaire SN2017eaw at mag 18 !

[Robin Leadbeater]

SN2017eaw is a year old and has faded to Vmag 18
https://sites.google.com/view/sn2017eaw/sn2017-eaw

It is still measurable with the ALPY 200 though (My faintest spectrum so far) and shows some nice forbidden lines now it is in the nebular phase.

sn2017eaw_20180523_annot_3.png (31.68 KiB) Viewed 6670 times

The spectrum still shows a good match to IIP supernova SN2004et at the same age which exploded in the same galaxy (ngc6946)

sn2017eaw_20180523_SNID.png (35.51 KiB) Viewed 6670 times

Cheers
Robin

[Francois Teyssier]

Very impressive result on such a faint object.
Did you filter the spectrum?

Cheers,
François

[Robin Leadbeater]

Hi Francois,

Yes The spectrum is slightly oversampled so I filtered it a bit to help the classification. It dropped the resolving power from 130 to ~90 so I probably overdid it a bit. The resolution is still high enough on these broad line spectra though.

sn2017eaw_20180523_978_filter_effect.png (34.54 KiB) Viewed 6649 times

Skies do not get completely dark here at this time of year so I was limited to 2 hours exposure and there was a first quarter moon so conditions were not perfect. I might be able to follow it a bit further yet.

Cheers
Robin

[Olivier GARDE]

Hi Robin,

Mag. 18, great result !!!

[etienne bertrand]

Bonjour Robin,

Bravo pour le spectre c'est impressionnant !

[JP Nougayrede]

Mag 18, very impressive indeed !

[James Foster]

To: Robin,

Thanks for the update! I will continue my photometry of this object for the next couple of weeks.....lucky my C-11 can just reach this in for IVB photometry!
I will also take this from my dark/high altitude site next week where I should easily get to this magnitude range.

James

p.s. I'm giving a talk at SAS on 16Jun18 and one of the slides I use is an animation for 4 months of LISA data and I'll mention your continued spectral observation.