CH cyg

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... [Lire la suite]

A call for observations of the famous symbiotic star, one of the brightest, CH cyg has been launched by Margaritta Karovska. This is to support observations planned for the next two weeks in X ray (CHANDRA) and otical/UV (HST) domains. Observations are gathered on this page by the ARAS group http://www.astrosurf.com/aras/surveys/chcyg/index.html A run of three weeks of observations is ongoing with my eshell spectrograph and 0.35m LX200 telescope. I organized my observing session is divide in two parts. First part until... [Lire la suite]