VV Cephei Corrected

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Albert Stiewing
Posts: 15
Joined: Mon Jul 25, 2016 6:28 pm

VV Cephei Corrected

Post by Albert Stiewing »

I have mirrored all my data and reprocessed. Comments welcomed.
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_vvcephei_20170704_951_amst.png
_vvcephei_20170704_951_amst.png (6.23 KiB) Viewed 3020 times
Peter Somogyi
Posts: 420
Joined: Sun Jul 13, 2014 8:56 am

Re: VV Cephei Corrected

Post by Peter Somogyi »

Hello Albert,

By picture looks ok, however the '3 x 1800 s' is typically '3 x 180 s' with my 12" scope. Was it mistyped?

Cheers,
Peter
Olivier GARDE
Posts: 1243
Joined: Thu Sep 29, 2011 6:35 am
Location: Rhône Alpes FRANCE
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Re: VV Cephei Corrected

Post by Olivier GARDE »

HI Albert,

Your spectrum look good (I can't check the wavelengh calibration on the graph) except the continuum who should be at one.

And the same question as Peter: if you need to do 3 exposures of 1800s to get this spectrum whose magnitude is about 4.9, there is a problem in your set up.

With an eshel spectrograph I need only about 10 exposures of 120s to get a SNR about 100.
LHIRES III #5, LISA, e-Shel, C14, RC400 Astrosib, AP1600
http://o.garde.free.fr/astro/Spectro1/Bienvenue.html
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