spectro-aras.com

A new tool for observers:

List of symbiotic stars with the last observations from AAVSO database (V., Visible)

I hope it will help

https://aras-database.github.io/databas ... SySts.html

To do : add graphs

François Teyssier

Etienne,

Je vais sortir les transcriptions en français et en anglais

François

Pour ceux qui ne connaissent pas, un outil trés utile et convivial pour programmer ses observations:
airmass.org

A good spectrum, Robin

ATels:
An interesting one: https://www.astronomerstelegram.org/?read=17030
Showing a new increase of the activity od the system in January

ATel #17041 https://www.astronomerstelegram.org/?read=17041 quoted by Robin
is really problematic
The authors do not refer to previous ...

The RNAAS about the flare detected in November 2024:
T CrB: Detection of a Short Flare in 2024 November
(F. Teyssier, S. N. Shore, F. Sims, R. Leadbeater, J. Guarro Flo, K. Shank, E. Bertrand, and J. R. Foster)

A new flare is decribed in https://www.astronomerstelegram.org/?read=17030
It is ...

A research note about the 2024 November flare is under publication.

David Cujedo obtained a spectrum showing that the system is in a new excited state, with He II, He I.
The observation confirms that short ionized stages could be frequent but not detected due to the cadence of the monitoring ...

Excellent.
A lot of parameters are still unknown for this star.
A continuous monitoring (at least 1 spectrum by month) is suggested on at least an orbital period (unknown, probably 400 as an order or magnitude)

You are welcome, James!

Y Gem is bright (V = 9 to 10) semi-regular variable known as X-rays and UV emitter.

RA = 07 41 08.52
DE = +20 25 44.33

A recent publication (Guerrero+,2024) establishes its status of symbiotic star (accretion powered):
https://ui.adsabs.harvard.edu/abs/2024arXiv241114270G/abstract

The spectrum ...

Update of the graph describe in the ATel,
with spectra obtained by Forrest Sims (LISA R1000) and Robin Leadbeater (ALPY600).