AB Aur campaign supporting HST observations - Alert Notice 809

Affiliation
American Association of Variable Star Observers (AAVSO)
Tue, 01/17/2023 - 23:18

AAVSO Alert Notice 809 announces an observing campaign on the YSO AB Aur beginning immediately. Please see the notice for details and observing instructions.

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

- Campaigns & Observation Reports: https://www.aavso.org/ab-aur-campaign-2023
- Young Stellar Objects: https://www.aavso.org/ab-aur-campaign-2023-01

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

Affiliation
American Association of Variable Star Observers (AAVSO)
AB Aur being observed with HST Feb7/8 - Alert Notice 811

AAVSO Alert Notice 811 reports on the exact times of HST observations of AB Aur and has an important note about which check star to use. Please see the notice for details and observing instructions.

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

- Campaigns & Observation Reports: https://www.aavso.org/ab-aur-campaign-2023
- Young Stellar Objects: https://www.aavso.org/ab-aur-campaign-2023-01

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

Affiliation
American Association of Variable Star Observers (AAVSO)
AB Aur HST observations March 1-2 - Alert Notice 814

This post was inadvertently made twice yesterday in the Campaigns forum instead of once there and here. Apologies!! Please observe AB Aur tonight and tomorrow night (and then continue as instructed in the Alert Notice below).

AAVSO Alert Notice 814 reports on the exact times of the second set of HST observations of AB Aur. Please see the notice for details and observing instructions, including information about which check star to use.

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

- Campaigns & Observation Reports: https://www.aavso.org/ab-aur-campaign-2023
- Young Stellar Objects: https://www.aavso.org/ab-aur-campaign-2023-01

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

Affiliation
American Association of Variable Star Observers (AAVSO)
AB Aur observations update from Dr. Biddle

Dr. Lauren Biddle asked me to share this update with you:

The third HST dataset was successfully acquired with several supporting observations by AAVSO observers. Thank you to everyone who has been on board with us the past few months!
 
The final two rounds of HST observations for our program will take place between December 2023 – January 2024, presenting even more opportunities for monitoring AB Aur's variability when it is visible once again in the Fall and Winter. Please keep an eye out for updates later this year!
 
In the meantime, all observations that may be taken during the remainder of AB Aur's visibility this Spring are still important and will be assessed during the analysis phase of our program.
 
Please continue to observe AB Aur to solar conjunction, and pick it up again in late September.
 
Many thanks, and good observing,
 
Elizabeth
Affiliation
American Association of Variable Star Observers (AAVSO)
AB Aur HST campaign Dec 2023-Feb 2024 - Alert Notice 842

AAVSO Alert Notice 842 announces a new observing campaign on the YSO AB Aur beginning immediately. Please see the notice for details and observing instructions. The notice also contains information about a free webinar on this star and campaign being held on November 19.

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

- Campaigns & Observation Reports: https://www.aavso.org/ab-aur-campaign-2023
- Young Stellar Objects: https://www.aavso.org/ab-aur-campaign-2023-01

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

Affiliation
American Association of Variable Star Observers (AAVSO)
AB Aur webinar tomorrow

Hi folks.  Quick reminder that the webinar on AB Aur results (so far) and this year's AB Aur campaign is tomorrow (Sunday) at 2PM Eastern, 19:00 UTC.   Dr. Biddle will tell us some about the AB Aur system, their work on it with McDonald Observatory and HST, and discuss some particulars of this year's AAVSO campaign.  Plenty of time is set aside for questions and discussion.

Register for the webinar at this link:

https://us02web.zoom.us/webinar/register/4116999884483/WN_Vr3GfhiDRMSrQpGyvrzUlA

Clearest skies,

Walt

Affiliation
American Association of Variable Star Observers (AAVSO)
HST observations scheduled for AB Aur - Alert Notice 844

AAVSO Alert Notice 844 reports on the HST observations that have been scheduled for the bright YSO AB Aur. Please see the notice for details and observing instructions.

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

- Campaigns & Observation Reports: https://www.aavso.org/ab-aur-campaign-2023
- Young Stellar Objects: https://www.aavso.org/ab-aur-campaign-2023-01

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

Affiliation
American Association of Variable Star Observers (AAVSO)
AB Aur HST scheduled Jan 17-18 - Alert Notce 846

AAVSO Alert Notice 846 announces the exact timing of HST observations scheduled for 2024 January 17-18 UT on the YSO AB Aur. Please see the notice for details and observing instructions.

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

- Campaigns & Observation Reports: https://www.aavso.org/ab-aur-campaign-2023
- Young Stellar Objects: https://www.aavso.org/ab-aur-campaign-2023-01

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

Affiliation
American Association of Variable Star Observers (AAVSO)
AB Aur HST Jan 17-18 obs CANCELLED

Dr. Biddle has just informed us that the HST observations of AB Aur scheduled for today (Jan 17-18) have been CANCELLED. HST has gone into safe mode, for reasons not yet given. When more information is available about future scheduling, it will be shared here.

Please continue to observe AB Aur according to the cadence given in Alert Notice 846.  Many thanks!

Good observing,

Elizabeth

Affiliation
American Association of Variable Star Observers (AAVSO)
AB Aur HST exact schedule 2024 Feb 21-22 - Alert Notice 852

AAVSO Alert Notice 852 gives the exact HST schedule on 2024 February 21-22 for the YSO AB Aur. Please see the notice for details and observing instructions.

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

- Campaigns & Observation Reports: https://www.aavso.org/ab-aur-campaign-2023
- Young Stellar Objects: https://www.aavso.org/ab-aur-campaign-2023-01

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

Affiliation
British Astronomical Association, Variable Star Section (BAA-VSS)
2 x 120 comps on chart

There are two stars labelled 120 on the AAVSO chart.

Please can you ID which is to be used using the chart reference ID as I don't know which is GSC 2387-0935

Thanks