HST and Chandra obs scheduled for R Aqr - Alert Notice 689

Affiliation
American Association of Variable Star Observers (AAVSO)
Fri, 01/03/2020 - 20:27

AAVSO Alert Notice 689 announces observations of R Aqr scheduled with HST and Chandra at the request of Dr. Margarita Karovska. Photometry and spectroscopy are urgently requested. Please see the notice for details and observing instructions.

Many thanks, and Good observing,

Elizabeth O. Waagen, AAVSO HQ

Note: This forum thread was created in January 2020 but is related to the threads in the Campaigns and LPV forums on the 2019 campaign on R Aqr.

Affiliation
American Association of Variable Star Observers (AAVSO)
Chandra and HST observation schedules for R Aqr

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)
R Aqr spectroscopy needed - Alert Notice 696

AAVSO Alert Notice 696 announces an urgent, renewed (with modifications for B observations) request for observations of R Aqr, particularly for B photometry. Spectroscopy is also requested. 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)
Click on highlighted link to see text of Alert Notice

Hi Aakash,

To read the text of the Alert Notice, click on the blue highlighted name of the Alert Notice in my message - that is the link. You can do the same thing here: click on AAVSO Alert Notice 696 and you will be taken to the webpage of the Alert Notice.

To see the text of any AAVSO Alert Notice, go to the AAVSO Alert Notices for Observing Campaigns and Discoveries webpage: https://www.aavso.org/aavso-alert-notices-for-observing-campaigns-and-discoveries and click the blue name of the Alert Notice you wish to read. This webpage can be accessed from the AAVSO homepage - hover on the grey Observing tab and choose the third item in the list that drops down.

Good observing,

Elizabeth

 

Affiliation
American Association of Variable Star Observers (AAVSO)
R Aqr observations needed for Chandra and HST - Alert Notice 738

AAVSO Alert Notice 738 announces observations of R Aqr to be made by Chandra and HST and requests photometry, visual observations, and spectroscopy. Coverage is needed as soon as R Aqr is observable in the dawn twilight. Please see the notice for details and observing instructions.

There are threads for this campaign under the following forums:

- Campaigns and Observation Reports: https://www.aavso.org/r-aqr-campaign-2019
- Long Period Variables: https://www.aavso.org/r-aqr-campaign-2019-01
- Spectroscopy: https://www.aavso.org/r-aqr-campaign-2019-02

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

Many thanks, and Good observing,

Elizabeth O. Waagen, AAVSO HQ

Affiliation
American Association of Variable Star Observers (AAVSO)
Chandra observing R Aqr Apr 29 and 30

Re Alert Notice 738, Dr. Karovska informs us that Chandra will be observing R Aqr on 2021 Apr 29 and 30. B and V observations are crucial through these dates, as well as until after the HST observations are made in May (currently scheduled for the week of May 16-22).  She also sends thanks to the observers for their invaluable coverage to date, especially appreciated as R Aqr is so difficult to observe at present.

Please keep up the excellent work, and keep those B, V, and visual observations coming!

Many thanks, and good observing,

Elizabeth

Affiliation
American Association of Variable Star Observers (AAVSO)
R Aqr HST schedule for May 2021

Dr. Margarita Karovska informs us that the HST observations of R Aqr (Alert Notice 738) have been scheduled for

2021 May 13 10:57:01 - 18:08:28 UT.

As with all HST observations, it will be crucial to know the V magnitude 24 hours before the scheduled time in order for the HST team to make a go/nogo decision.

Nightly observations are essential May 10/11 through May 14/15, then twice weekly through May 27/28. Please report your multicolor (particularly V and B) and visual observations as soon as possible after making them so Dr. Karovska will have access to them for her report to the HST team.

Spectroscopy is particularly welcome during this time. Please see the notice for instructions.

Many thanks, and Good observing,

Elizabeth

Affiliation
American Association of Variable Star Observers (AAVSO)
Thank you from Dr. Karovska for your observations

Dr. Margarita Karovska, the astronomer requesting observations of R Aqr (AAVSO Alert Notice 738), sends the following message of appreciation for your observations to date:

"The AAVSO observations (especially the photometry) were very important for determining the  phase of the pulsation of R Aqr and where we are in terms of brightness of the source - absolutely necessary for evaluating and revising the exposure times (avoiding saturation) of the HST images.

"THANK YOU AAVSO observers for your dedicated observations and the great support leading to successful multiwavelength observations (space- and ground-based) of this wonderful variable, interacting and jet-producing symbiotic system."

Please continue to observe R Aqr - your multicolor photometry, visual observations, and spectroscopy are essential to the ongoing study of this system.

Many thanks, and good observing,

Elizabeth