04 mai 2014

WETLR 2015

Faisant suite au WETLR 2014, voici l'annonce officielle du WETLR 2015 ! Week-End Technique du Languedoc Roussillon 2015 Forum-Rencontre Astro / CCD Star Party   La Société Astronomique de Montpellier organise le WETLR 2015, réunion d'astronomes amateurs,  réunion de type "Forum-Rencontre Astro" sur la base d'une "CCD Star Party", du jeudi 7 mai 2015 à 17h au dimanche 10 mai 2015 à 17h à proximité de Saint Chinian (34), 30 km au nord ouest de Béziers,   Cette réunion sera orientée vers toutes les... [Lire la suite]
Posté par gabalou à 20:34 - - Commentaires [0] - Permalien [#]
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04 mai 2014

T Tauri stars campaign, une campagne d'observation T Tauri pour l'automne 2013

  AAVSO Alert Notice 473T Tauri stars observing campaignNovember 6, 2012Darryl Sergison (University of Exeter) has requested AAVSOassistance with a campaign he is organizing on six T Tauri stars.He writes: "In Autumn 2013 I [and my PhD supervisor Tim Naylor ofExeter University are] undertaking a new study into the nature ofpre-main-sequence low mass stars, using time series opticalspectroscopy and UV-Visual-IR photometry...to build a clearerpicture of the environment around young solar-type stars andcharacterise their various... [Lire la suite]
Posté par gabalou à 20:25 - - Commentaires [0] - Permalien [#]
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04 mai 2014

Thorlabs optical fibers with FC connectors

Here are the ultimate and chippest multimode optical fiber with FC connector, ceramic ferule, i've found on the net. I ordered and received quickly a set of 5m lenght 200µm and 50µm diameter. http://www.thorlabs.com/newgrouppage9.cfm?objectgroup_id=5794 An immediate flux comparaison on thorargon and tungstene lamp with Sheliak 10m lenght 50µm diameter, shielded ones, show an increase of the troughput of 40% ! Well the shorter lenght of the Thorlabs one may be an explanation but not enough for such increase. Same constat with 200µm... [Lire la suite]
Posté par gabalou à 12:06 - - Commentaires [0] - Permalien [#]