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Bonsoir, après un long arrêt observationnel, j'ai pu prendre le premier spectre depuis assez mois. Voici le spectre de la comète de mode, avec identification des principales bandes. Le sodium n'est pas visible, il semble que cet élément seulement ait visible dans les comètes quand ils sont très proc...

Hello, I have received an alert about ASASSN-19aad as a possible reddened nova. Here is a spectrum taken "in extremis" before the star went out of vision, Very strange, this spectrum. Star was about mag. 9 yesterday, the day of discovery. asassn-19aad_ 20191029_754_FPC.png Greetings, Fran

Hello, after a long stop due to lack of time to observe, two days ago I could obtain some spectra. Here is a low resolution spectrum of R Aqr compared wiht another taken a year ago. More or less both spectra are taken in the same pulsation phase. The main difference is in the Mira intensity: the con...

Hi, here is my contribution from the last night, taken with the DADOS and the 1200 l/mm grating. I'm not sure if these spectra will be useful or not, because the resolution is about R=4000. Plus, I'm a bit worried about lambda calibration: it seems that the bands are a bit shifted from the expected ...

Hello,

here is a recent spectrum of the suspected symbiotic GDS J0731468-195434. No emission lines have been detected, the signal is low but enough to discard the presence of medium or strong emisison bands.
Greetings,
Fran

David Boyd wrote:Hi Fran,

I googled him and found http://space.mit.edu/people/guenther-hans-moritz

David

Thank you, David!
Fran

Excellent work, David. Here are the spectrum of the same stars taken with the DADOS and the 1200 l/mm grating. I'm not sure if they will be useful or not, because the resolution is only medium. (I don't have the mail where to send the spectrum) v1307ori_ 20181123_932_FPC.png v1410ori_ 20181123_982_F...

Hello, a photometry and spectroscopy campaign of four Herbig Ae/Be stars has been launched by the AAVSO. Interesting for Lhires III spectrographs but lower resolution is also welcome. Greetings, Fran ----------------------------------------------------- November 21, 2018: Dr. Hans Moritz Guenther (M...

Hi, after a long absence, I tried to take some spectra of these suspected symbiotic star. They are very faint and bad placed to my observatory and, after trying with two different stars and avoiding guidage problems with PHD2, only with GAIA DR2 4150446010182968192 I could obtain something decent. W...

Fantastic work, James, this star is really outstanding. I stil don't know how to interpretate this spectrum, these very strange triple absortion bands seems unique... at least I have not seen somethink like this in any star. Last night I tried to catch this star. Here is my result. Not easy even wit...