R Aqr Chandra observations September/October 2022 - Alert Notice 792

American Association of Variable Star Observers (AAVSO)
Wed, 09/21/2022 - 20:28

AAVSO Alert Notice 792 announces observations of the symbiotic binary (Mira + white dwarf) R Aqr with the Chandra X-ray satellite on 2022 September 26. Please see the notice for details and observing instructions.

There are threads for this campaign under the following AAVSO forums:

- Campaigns and Observation Reports: https://www.aavso.org/r-aqr-campaign-2022
- Long Period Variables: https://www.aavso.org/r-aqr-campaign-2022-01
- Spectroscopy: https://www.aavso.org/r-aqr-campaign-2022-02

Please subscribe to these threads if you are participating in the campaign so you can be updated. Join in the discussion or ask questions there!

Many thanks, and Good observing,

Elizabeth O. Waagen, AAVSO HQ

American Association of Variable Star Observers (AAVSO)
R Aqr observation (V,B,visual) needed now - URGENT

Dr. Margarita Karovska urgently needs a V and/or B observation of R Aqr RIGHT NOW - TONIGHT (FRI/SAT Apr 7/8) and SAT/SUN and SUN/MON. A visual observation would be very valuable, too. R Aqr (23 43 49.46 -15 17 04.2  2000.0) is barely past solar conjunction so may not be observable yet from your location.

AAVSO observations from just before solar conjunction show R Aqr may be brightening from its minimum much earlier than expected. Dr. Karovska is meeting with the HST and Chandra teams on Monday/Tuesday in hopes of scheduling R Aqr for May, but if it is too far above minimum now it will not be suitable for observation then, because the behavior Dr. Karvovska is interested in will be masked.

Anything you can do would be appreciated enormously!

Many thanks, and Good observing,

Elizabeth Waagen, AAVSO HQ