Bon Anniversaire SN2017eaw at mag 18 !

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Robin Leadbeater
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Bon Anniversaire SN2017eaw at mag 18 !

Post by 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
sn2017eaw_20180523_annot_3.png (31.68 KiB) Viewed 6213 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
sn2017eaw_20180523_SNID.png (35.51 KiB) Viewed 6213 times

Cheers
Robin
LHIRES III #29 ATIK314 ALPY 600/200 ATIK428 Star Analyser 100/200 C11 EQ6
http://www.threehillsobservatory.co.uk
Francois Teyssier
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Re: Bon Anniversaire SN2017eaw at mag 18 !

Post by Francois Teyssier »

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

Cheers,
François
Robin Leadbeater
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Re: Bon Anniversaire SN2017eaw at mag 18 !

Post by 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
sn2017eaw_20180523_978_filter_effect.png (34.54 KiB) Viewed 6192 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
LHIRES III #29 ATIK314 ALPY 600/200 ATIK428 Star Analyser 100/200 C11 EQ6
http://www.threehillsobservatory.co.uk
Olivier GARDE
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Re: Bon Anniversaire SN2017eaw at mag 18 !

Post by Olivier GARDE »

Hi Robin,

Mag. 18, great result !!!
LHIRES III #5, LISA, e-Shel, C14, RC400 Astrosib, AP1600
http://o.garde.free.fr/astro/Spectro1/Bienvenue.html
etienne bertrand
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Joined: Mon Aug 31, 2015 11:26 am

Re: Bon Anniversaire SN2017eaw at mag 18 !

Post by etienne bertrand »

Bonjour Robin,

Bravo pour le spectre c'est impressionnant !
JP Nougayrede
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Joined: Tue Oct 20, 2015 8:33 pm

Re: Bon Anniversaire SN2017eaw at mag 18 !

Post by JP Nougayrede »

Mag 18, very impressive indeed !
James Foster
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Joined: Sun Jan 24, 2016 7:14 am

Re: Bon Anniversaire SN2017eaw at mag 18 !

Post by 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.
James Foster
eShel2-Zwo ASI6200MM Pro
Lhires III (2400/1800/600 ln/mm Grat) Spectroscope
LISA IR/Visual Spectroscope (IR Configured)
Alpy 200/600 with Guide/Calibration modules and Photometric slit
Star Analyzer 200
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