spectro-l at Yahoo! Groups

ArasBeam - Appel à observation !

Francois Cochard — Sat, 21 Nov 2009 09:57:14 GMT

Hello tous, Un message rapide pour vous informer que Philippe Stee (Obs. de la Cote d'Azur) vient de mettre en ligne sur ArasBeam une demande d'observation

nova_2009_11_20

Eric SARRAZIN — Fri, 20 Nov 2009 19:50:15 GMT

Bonsoir, Des nouvelles de la Nova scuti 2009. Spectre de niveau 1b pris tout à l'heure (18h15 TL) comparé à celui du 18/11/2009. Evolution des raies de

Trans. : [spectro-l] webcam et spectro Bareges

LairdeBaud@... — Thu, 19 Nov 2009 16:16:03 GMT

Bonjour à tous Bon,j'ai trouvé,il suffisait de télécharger un pilote compatible XP mais pour une autre caméra par ex _PCVC830K/00 Philips PC Camera

webcam et spectro Bareges

LairdeBaud@... — Thu, 19 Nov 2009 14:00:18 GMT

Bonjour à tous La Toucam Pro PCVC 740 K est incompatible avec le système d'exploitation Windows XP (ordi compaq Evo N620c ),or elle m'est très utile car

Re: New telescope advice

Robin Leadbeater — Thu, 19 Nov 2009 11:43:35 GMT

Hi Ken Not sure about the latest model but the original holders could take up to 50x50 which is why Lothar was able to fit a larger grating to go to f6. With

Re: New telescope advice

Ken Harrison — Thu, 19 Nov 2009 11:23:07 GMT

Robin, Understood. This angular off set ( about 2 degrees) is taken into acount. Where I went wrong was the size of the grating in the HiresIII, I thought from

Re: New telescope advice

Robin Leadbeater — Thu, 19 Nov 2009 11:15:13 GMT

Hi Ken, Don't forget that in a Littrow design you have to squeeze two beams through the same lens and they have to be slightly offset which needs a slightly

Re: New telescope advice

Francois Cochard — Thu, 19 Nov 2009 06:43:23 GMT

Hello all, The calculation is simple (this is what you did) : - If you have a F/8 telescope, the beam diameter is 200/8 = 25mm. - The lense is 30mm diameter,

Re: New telescope advice

Ken Harrison — Thu, 19 Nov 2009 03:35:23 GMT

I thought, as per the Shelyak LiHires description that the collimating lens used in the LihiresIII was a 30mm fl 200mm lens. This appears to give a clear

Re: New telescope advice

bd_heathcote — Thu, 19 Nov 2009 02:22:59 GMT

Hi Ken, The Lhires III is 'usable' in the f/8 to f/12 range but optimised for f/10 (not f/8). Bernard

Re: spectre Nova Scuti

françois teyssier — Wed, 18 Nov 2009 17:02:54 GMT

Après une semaine de mauvais temps, enfin un nouveau spectre de la nova. Pas très grave car le spectre évolue lentement (ce qui est une caractéristique des

Re: New telescope advice

jacques savard — Wed, 18 Nov 2009 15:33:00 GMT

very good info thank very much it push me to try a setup like this later normaly it incrise results and become a fisld of interesteing reseach for amator jack

Re: Kitty 1 (capteur CCD 237)et XP et spectro Bareges

LairdeBaud@... — Wed, 18 Nov 2009 13:25:43 GMT

Bonjour à tous ça marche super........Gd merci Pierre Bonjour à tous ça marche super........Gd merci Pierre

Re: New telescope advice

Emmanuel Thienpont — Wed, 18 Nov 2009 11:36:58 GMT

Thx a lot Robin for your thoughts about this issue. Greetz Manu On Wed, Nov 18, 2009 at 11:34 AM, Robin Leadbeater < ... Thx a lot Robin for your thoughts

Re: New telescope advice

Robin Leadbeater — Wed, 18 Nov 2009 11:13:45 GMT

Hi Ken, At first glance this seems to have the same problem that other systems using cylindrical lenses/needles to produce artifical slits have in that the