spectro-aras.com

Hello,

my contribution, not as good as Forrest's one, but still valuable, I hope...
Greetings,
Fran

Hi, Peter, thank you for the comments. I took last night a spectrum but my resolution is worse (bad focusing I believe). I see important differences. Look for example at Ti II band (3913 A). In your spectrum is clearly visible but not in the mine. I'm going to sent this spectrum to the AAVSO. I aske...

(don't confuse with Algol). Hello, a new campaign of b Per has been announced in the AAVSO Alert campaign. This is an elliptical variable but also an eclipsing one. There is a third component that orbits the two main stars every 704.5 days and eclipses the system producing a very interesting photome...

Hi, As it can also be seen with the graph of Umberto. It is very possible that there is a reverse relationship, between, the increase in brightness of the Nova and the decrease in the intensity of the Halpha. Joan. Yes, Joan, the nova is again rebrightening. Outstanding! Here is a spectrum from two...

Ooops!, What a surprise... I didn't noticed it. Apart from the dissapearance of the [FeVII] lines, I see a new broad band at 4637 A, maybe a triplet. Maybe NIII? What I don't understand is why, in an outburst, the common enveloppe becomes colder. In this situation, I believed that the dissapearance ...

Outstanding coverage of this "nova". Last news show that the nova is again rebrightening and is going into his third maximum.

Greetings
Fran

Bonjous à tous, ... et mes felicitations à tout le monde pour tous ces magnifiques spectres et le travail publié au CBAT. Cette nova est très très intéressant et la seule chose que j'ai à regretter est qu'elle sera de plus en plus difficile d'observer pour la proximité au soleil... J'ajoûte le derni...

Hello, yesterday at night I received an alert about PNV J20205397+2508145, a transient of mag. 12-13. Although the new telescope I am testing these days wasn't still ready to do spectroscopy, I could take a spectrum with enough signal. But the cotinuum is almost free of emission or absortion bands: ...

Hi,

here is my contribution for R Aqr. The comparison star is HD 222847 (B9 V).

I wonder what is the optimum frequency of observation: a spectrum every week? 15 jours?
Greetings
Fran

Hello,

here is my contribution from the night before yesterday.
Greetings
Fran