Dans un message du 19 Mai, Margarita Karovska (Harvard CFA) signale un récent sursaut en magnitude de l'étoile symbiotique CI Cygnii.
"I am still working on the interpretation 2012 observations, including 3-D hydrodynamical modeling, to explain what we saw.
I noticed that recently CH Cyg seems to be brighter in V and B (up to V6ish).
It is about V=7 now. I anticipate a possible outburst soon.
Do you have any recent spectra (from the past year)?
Any possibility to monitor it spectroscopically for few weeks?
Once a week would be great!
Coordinates: RA 19 24 33.07 Dec. +50 14 29.1 (J2000.0)"
Margarita appelle à une surveillance acrue de la part des amateurs dans les bandes spectrales de la précédente campagne de 2012
J'ai pu l'observer la nuit suivant son message et j'ai pu constater qu'elle était effectivement trés brillante et largement accessible à nos instruments. La particularité de ce spectre est d'être à la fois un spectre d'étoile froide, chaude et nébulaire. Cet objet complexe est encore le sujet de nombreuses publications récentes et d'études à venir.
English:
In a May,19 message Margarita Karovska (Harvard CFA) warned on a recent rise in magnitude of the symbiotic star CH Cygnii.
"I am still working on the interpretation 2012 observations, including 3-D hydrodynamical modeling, to explain what we saw.
I noticed that recently CH Cyg seems to be brighter in V and B (up to V6ish).
It is about V=7 now. I anticipate a possible outburst soon.
Do you have any recent spectra (from the past year)?
Any possibility to monitor it spectroscopically for few weeks?
Once a week would be great!
Coordinates: RA 19 24 33.07 Dec. +50 14 29.1 (J2000.0)"
Margarita calls up to increase monitoring on behalf of the amateurs in the spectral ranges of the previous 2012 campaign
I was able to observe the night following her message and I was able to notice that it was actually very bright and widely on the range of our instrument. The peculiarity of CH cyg spectra is to be at the same time a spectre of cold star hot star and nebular outflow. This complex object is still the subject of numerous recent publications and studies to come.
Quelques extraits du profil (1h, R11000)
New observation, May 27
Strong variations in h beta line
