spectroscopy

Alert Notice 703: TCP J21040470+4631129 images, photometry, and spectroscopy urgently requested - REVISED

Note: This Alert Notice was revised from its original text to correct a misinterpretation of the request from Dr. Echevarria, to update the recent observations, and to update the status of scheduled HST observations.  -  Elizabeth O. Waagen, 2 April 2020

April 2, 2020   (original issued April 1, 2020)

Alert Notice 700: EE Cep observing campaign 2020-2021

Note:  Please continue observations at a cadence of 1 observation per week at least through 2021 June 15. See the post by Principal Investigator Dariusz Kubicki in the forum threads for this campaign (URLs below).  -  Elizabeth O. Waagen, 2020 June 29

 

The eclipse of EE Cep has occurred but continued monitoring is requested to establish post-eclipse behavior.  - Elizabeth O. Waagen, 2020 May 21

Alert Notice 696: R Aqr photometry (especially B) and spectroscopy needed

Note: Continued observations, particularly in B, V, and visual, are needed now and through the coming year. R Aqr is presently approaching solar conjunction and observations are very difficult, but they are extremely important as R Aqr is also approaching minimum. Please observe as long as possible now and pick up again as soon after conjunction as possible.  -  Elizabeth O. Waagen, 1 February 2021

February 3, 2020

Alert Notice 694: Spectroscopy of gamma Cas requested

Note: Principal Investigator Ernst Pollmann particularly requests higher-resolution (at least 10000) spectra of gam Cas.  -  Elizabeth O. Waagen, 21 May 2020

January 31, 2020

AAVSO Forum threads (scroll to the bottom of a thread for latest posts):
- Campaigns and Observation Reports: https://www.aavso.org/gam-cas-campaign
- Spectroscopy: https://www.aavso.org/gam-cas-campaign-01

Alert Notice 692: V694 Mon (MWC 560) to be observed with Chandra

Note: Note: Observations of V694 Mon are scheduled for 11 March 2020 with HST, and for 22 March 2020 with XMM. Please continue to observe as indicated in Alert Notice 695 but with the high-intensity coverage taking place March 9 through March 14 and March 19 through March 25.  -  Elizabeth O. Waagen, 6 March 2020