11 juillet 2012

First echelle spectra of AZ Cas

Here is an echelle spectra showing h alpha red wing in emission. Order 49 to 28, 4550A to 8000A seems to be good for exploitation. Threre is not enough signal in the blue to achieve a good snr so i didn't extract blue orders. It is the first echelle spectra for the AZ Cas 2012-2014 campaign Merged version (quick look): 20120710_222814_AZcas_6x1200s_FULL_TGarrel Zip archive with individuals orders (best) 20120710_222814_AZcas_6x1200s_TGarrel    
Posté par gabalou à 18:36 - - Permalien [#]
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11 juillet 2012


The nova sgr 2012 No4 was discovered by Koichi Nishiyama, Kurume,Japan and Fujio Kabashima, Miyak, Japan. CBAT I have obtained an echelle spectrum (R~11000) of the Nova Sgr 2012 No.4 (CBET3166) on July 8.872 (UT), using the eshell spectrometer attached to the 0.35-m Schmidt-Cassegrain telescope at the fontcaude observatory, France. Emission lines of Balmer series, Fe II , Na I D and O I (7773) can be seen in the spectrum.  At the time of exposure, the nova sgr 2012 No4 was at magV 7.8 (TAROT). Zip archive of 21 individual Fit... [Lire la suite]
Posté par gabalou à 03:36 - Permalien [#]
10 juillet 2012

AZ Cas eclipse and periastron passage of 2012-2014, a new campaign

  Spectroscopic observations are required for AZ cas (mV 9.3) http://www.konkoly.hu/cgi-bin/IBVS?6027 http://www.astri.uni.torun.pl/~cgalan/AZCas/  i'm still trying to catch a spectra, first one i've took was from a brighter B7II star around....  Here are  comments from Cezary Galan  "Please do not be discouraged (such mistakes do happen and important only "to catch" them early) and try again to obtain spectrum of AZ Cas. It could be difficult, because AZ Cas is about 3 mag fainter than HR 488, however at... [Lire la suite]
Posté par gabalou à 11:05 - - Permalien [#]
04 juillet 2012

Publication of results of the Epsilon aurigae spectroscopic campaign

For HVAR2012, publication by AAVSO of results of the spectroscopic campaign on epsilon aurigae are available. An analysis of the behaviour of the K 7699A and Na D lines by Robin Leadbeater  during eclipse can be found here http://arxiv.org/abs/1206.6754 An analysis of the behaviour of the h alpha line by Benjamin Mauclaire during eclipse can be found here http://arxiv.org/abs/1207.0795 A large collection of spectra has been gathered by Robin Leadbeater... [Lire la suite]
Posté par gabalou à 18:58 - - Permalien [#]
03 juillet 2012

FF cam poster

These days at HVAR 2012 here is the poster who summarize spectroscopic observations of this new founded binary. Any comments are welcome ! Poster_FF_Cam_Hvar_2012
Posté par gabalou à 16:16 - Permalien [#]
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30 juin 2012

RR Lyrae 20120624 Maxima

 Average seeing, and a strong wind did not allowed a good snr on this new time serie taken during a maxima rising phase Data at least. Note line doubling of NaD and strong h alpha and h beta emission during rising phase.   http://www.astrosurf.com/garrel/web_RRLyrae_Hb_20120624/RRlyrare_Hb_300serie.html          
Posté par gabalou à 13:45 - - Permalien [#]

10 juin 2012

Last news of FF cam before poster publication at HVAR2012

Anatoly Miroshnichenko and Stephen Danford, from University of North Carolina in Greensboro have begun to analyze the large collection of data on FF cam, available in Bess database. "Dear colleagues,Let me congratulate you on a discovery of binarity of FFCam. Thierry'sinitial suggestion from a dynamic spectrum is confirmed bymeasurements of the radial velocity of the Ca I 6102.72 A line thatbelong to the cool component of the system. The orbital period is7.785 days. I have only measured one line. Its equivalent width isalmost... [Lire la suite]
Posté par gabalou à 10:59 - - Permalien [#]
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02 mai 2012

a visit to Greensboro University and Three College Observatory

During a holiday trip in US, i had the opportunity to visit my friend Anatoly Miroshnichenko and his colleague Steve Danford at the University of North Carolina in Greensboro (UNCG). Here is a small report of a two days and one night spent there. Greensboro is an average town at extreme west of North Carolina. The landscape is essentially composed of large forest and small hills with numerous lakes and rivers. Everything is tree and grass. Only downtown emerge from this green ocean. UNCG campus is a true american Campus.... [Lire la suite]
Posté par gabalou à 10:47 - Permalien [#]
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24 mars 2012

Call for CH cyg observation

A call for observations of the famous symbiotic star, one of the brightest, CH cyg has been launched by Margaritta Karovska. This is to support observations planned for the next two weeks in X ray (CHANDRA) and otical/UV (HST) domains. Observations are gathered on this page by the ARAS group http://www.astrosurf.com/aras/surveys/chcyg/index.html A run of three weeks of observations is ongoing with my eshell spectrograph and 0.35m LX200 telescope. I organized my observing session is divide in two parts. First part until... [Lire la suite]
Posté par gabalou à 16:07 - - Permalien [#]
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23 mars 2012

FF cam, mid March report

FF cam is the weirdest thing i had never observed. Daily spectras are differents, intensities variation, shape, double or single peak, all configurations of the h alpha line for a Be star are possible. 4 differents observers are following this challenging star. Three echelle spectrographs (Eshell) and one long slit H alpha centered spectrograph (LhiresIII) with telescopes from 0.28m to 0.80m. 3 in Europe and 1 in US. Summary of the H alpha profiles: http://www.astrosurf.com/garrel/webFFcam_March19/Vspec_objet.html And some plots... [Lire la suite]
Posté par gabalou à 12:05 - - Permalien [#]
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