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Re: Fw: AAVSO Special Notice #176: Possible Nova in Scutum

nytecam — Fri, 20 Nov 2009 08:51:26 GMT

True - but with the nova's location [for me] low in the SW at dusk I've only a 10min or so window of observation - too brief to change grating/camera

Nova Scuti V496 from 2009/11/19

Torsten Hansen — Thu, 19 Nov 2009 20:17:02 GMT

Hello list, at last, a spectrum of the nova with my Staranalysers setup! Namely not my first one, but under reasonable and better conditions (yesterday we had

Re: Fw: AAVSO Special Notice #176: Possible Nova in Scutum

Ken Harrison — Tue, 17 Nov 2009 19:44:14 GMT

In some "busy" fields even rotating the grating/camera is still problematic. The guys in Oz have had success with a off-set 6mm aperture infront of the

Re: Fw: AAVSO Special Notice #176: Possible Nova in Scutum

ssb73q — Tue, 17 Nov 2009 19:36:34 GMT

Hi Ken, stars close to the spectrum? Then rotate the grating and camera assembly. That's one disadvantage that I have with using the Astronomik filter drawers

Re: Fw: AAVSO Special Notice #176: Possible Nova in Scutum

Ken Harrison — Tue, 17 Nov 2009 19:07:13 GMT

Richard, Understood, but the real problem was the background stars sitting in/on the spectrum. A wide slit or aperture mask would suppress them. ... -- "Very

Re: Fw: AAVSO Special Notice #176: Possible Nova in Scutum

ssb73q — Tue, 17 Nov 2009 18:58:20 GMT

Hi Ken, for spectra lines in the visible, using a UV/IR cut filter would eliminate light pollution outside 400-700nm. The Baader UV/IR cut has over 96%

Re: Fw: AAVSO Special Notice #176: Possible Nova in Scutum

Ken Harrison — Tue, 17 Nov 2009 10:03:57 GMT

What about a wide slit or aperture mask? This would at least supress the background field stars??? ... -- "Very funny Scotty... now beam down our clothes!"

Re: Fw: AAVSO Special Notice #176: Possible Nova in Scutum

nytecam — Tue, 17 Nov 2009 10:01:00 GMT

Hi François - the spectrum of a nova in a crowded starfield probably too much for a little 70mm OG but a good field shot last night via same at

Re: Fw: AAVSO Special Notice #176: Possible Nova in Scutum

kaufman_rob — Mon, 16 Nov 2009 22:47:12 GMT

Congratulations François! I tried for a spectrum last night with DSLR and Star Analyser, without much success I'm afraid. I have tall trees in the west, and

Re: Fw: AAVSO Special Notice #176: Possible Nova in Scutum

françois teyssier — Mon, 16 Nov 2009 20:07:02 GMT

Hello! Nice image with a so little instrument! I'm glad to see the first picture of the star itself : I've only the spectra. Soon I'll install a parallel

Re: Fw: AAVSO Special Notice #176: Possible Nova in Scutum

nytecam — Mon, 16 Nov 2009 10:37:19 GMT

Congrats Francois - pushed piggybacked ETX70 to limit last night with field spectrum including nova - if partially overlaid by another star;-)

Re: Live Spectroscopy Profile with SA

nytecam — Sun, 15 Nov 2009 10:55:06 GMT

Congrats Tom - most ingenious - is the code available? Would your s/ware work via my SX CCD USB2 downloaded FITs at 'video' rate ~4fps or is its application

Re: Fw: AAVSO Special Notice #176: Possible Nova in Scutum

Robin Leadbeater — Tue, 10 Nov 2009 22:43:09 GMT

Congratulations François, I do not have access to IAU circulars it but according to the latest AAVSO alert on this object you are named in IAU Circular #9093

Re: Fw: AAVSO Special Notice #176: Possible Nova in Scutum

Robin Leadbeater — Mon, 09 Nov 2009 19:55:18 GMT

Nice result Francois, I have forwarded your post to AAVSO Robin ... From: "françois teyssier" To:

Re: Fw: AAVSO Special Notice #176: Possible Nova in Scutum

françois teyssier — Mon, 09 Nov 2009 18:18:33 GMT

Spectrum with LHIRES III 150t/mm http://www.astronomie-amateur.fr/Projets%20Spectro4%20Novae.html A confirmation... Best regards François Teyssier