R Aqr observations needed urgently

Affiliation
American Association of Variable Star Observers (AAVSO)
Fri, 04/19/2019 - 18:50

AAVSO Alert Notice 665 announces an urgent request for observations of the symbiotic Mira R Aqr. Please see the notice for details and observing instructions.

Many thanks, and Good observing,

Elizabeth O. Waagen, AAVSO HQ

Affiliation
American Association of Variable Star Observers (AAVSO)

In Alert Notice 665, I said that R Aqr "is moving too close to the Sun to observe from the Northern hemisphere". I should not have said "moving too close", as the Northern season for R Aqr is just starting, not ending. The point is that R Aqr is too close to the Sun for Northern observers right now to observe without great difficulty, but easier for Southern observers as their nights are growing longer. I have edited the online version of the Alert Notice. My apologies for the error, and my thanks to Brian Skiff for letting me know.

Good observing,

Elizabeth

Affiliation
American Association of Variable Star Observers (AAVSO)

The exact schedules for the Chandra and HST observations of R Aqr (Alert Notice 689) are as follow:

Chandra (UT)  Note that this date is EARLIER than given in Alert Notice 689.
12 Jan 2020 00:13:21.409 - 12 Jan 2020 14:06:41

HST (times are UT)
13 Jan 2020 03:54:33 - 13 Jan 2020 04:48:21
13 Jan 2020 08:40:40 - 13 Jan 2020 09:34:54
14 Jan 2020 02:09:47 - 14 Jan 2020 03:58:31

Please see the Alert Notice for the cadence of observations before, during, and after the satellite observations.

Many thanks, and Good observing,

Elizabeth

Affiliation
American Association of Variable Star Observers (AAVSO)

Dear Observers,

If you have observations of R Aqr from the past week that you have not yet submitted, please do so as soon as possible. An astronomer needs to see the most recent data for a time-dependent observing proposial he is writing now.

Thanks,

Elizabeth

Affiliation
American Association of Variable Star Observers (AAVSO)

Hi Observers,

B observations are needed along with V and R - the B is very important as it relates to the activity of the white dwarf in the system. Thanks to those observers who have been able to observe in B - please continue if you possibly can!

Many thanks,

Elizabeth

Affiliation
Vereniging Voor Sterrenkunde, Werkgroep Veranderlijke Sterren (Belgium) (VVS)

Hi Elizabeth,

I have been following R Aqr over many weeks, but now the season has ended for my remote location in Chile. Last observations are done Jan. 28 when the stars was at airmass about 2.15.

Josch

Affiliation
American Association of Variable Star Observers (AAVSO)

Hi Josch,

Thank you for letting us know R Aqr is no longer observable from your Chile location. Thank you also for all of the excellent data you have been able to provide this season! When R Aqr is observable again for you, could you please resume observing it? I'm sure the eclipse will still be going on and the data will be extremely valuable.

Best regards, Elizabeth