spectro-aras.com

Increase of He II, and Balmer lines intensities in the last spectrum obtained by Joan

Equivalent widths mesaured on Echelle spectra: New observations strongly welcome for the next days

François
Stormy weather here

Hello,

These graphs, are a complement of the François's anterior explanation.

This is de first service of the Linx.

Today is de second day cloud, the weather will improve on next Wednesday.

Regards, J. Guarro.

Hi all,

According to last AAVSO observations from the previous night, there is an increase of brightness of AG Dra in all filters. Of course, it is based only on the observations by one observer, but nevertheless, also according to your last spectroscopic observation (the increase of EWs of Balmer lines and He II), it is worth monitoring the star in the next days.

We are looking forward to new observations. Have a clear sky!

Regards,
Jaroslav Merc

Bonjour à tous, placez le profil d'observation de la nuit 28/05/2017.
Umberto

I've been having issues processing my LISA spectra...think I just solved it with another tune-up at the scope.
Here is AG Dra on 28May17:

I labeled the probable He lines...Hope we see more "fireworks" in this system!

James

According to last AAVSO observations from the previous night, there is an increase of brightness of AG Dra in all filters. Of course, it is based only on the observations by one observer, but nevertheless, also according to your last spectroscopic observation (the increase of EWs of Balmer lines and He II), it is worth monitoring the star in the next days.

Clear sky last night
The fit is now in the base, Jaroslav

Significant increase of Raman OVI Update of EW from echelle spectra James: the identification of He I lines is correct
Your spectrum is welcome in the base!

Umberto: excellent coverage!



François

This full weekend's one night result - with an experiment, tuning the Alpy 600 focus on the UV (via mercury lamp's UV lines) + scope too (in turn loosing the IR part's focus): Looks like this tuning brought some extra (Balmer serie full).
Also lost the H-alpha with 3 x 15 minute exposures (almost H-beta, too).
The SNR start to become good from 3650A.
However, no big change in this region.

- Peter

Nice result Peter!
Waiting for the fit


No change since yesterday He II declining slowly

François

Bonjour, voici le profil hier soir et une comparaison des Raman OVI avec le jour 28/05/2017
Umberto

I believe (looking AG Dra in my video finder scope) that AG Dra has brightening as seen last night. I've taken BVI photometry of this object with a C-11 the last two weeks and will process that for submission to AASVO.

In addition, in support of the Solar Analog project, I'm getting a 200mm lens on a ST-8 and RVB & Stromgren V filters to mount on top of my CDK17 and spectroscope to take simultaneous specta/photometry.

James