R Aqr monitoring needed in support of Chandra and HST observations
Abstract:
Dr. Margarita Karovska (Center for Astrophysics|Harvard & Smithsonian) requests the assistance of AAVSO observers in monitoring the symbiotic binary (Mira + white dwarf) R Aqr in support of upcoming observations with HST scheduled for the week of May 5-8, 2023. When the exact date/time is known, it will be posted in the forum threads above.
Justification:
R Aqr is just emerging from its seasonal gap, and coverage is essential as soon as it is possible to pick it up in the dawn twilight from your location. It is critical to have some nights of positive observations prior to the satellite observations, and then follow up during May, June, and the first half of July 2023. Starting now, Dr. Karovska requests photometry, primarily V and B photometry, and then UIRH, and if at all possible mid-IR photometry. High-speed UB photometry and spectroscopy are also requested. Visual observations will be very valuable and are strongly encouraged.
Requested Data Types:
Spectroscopy, Photometry
Targets
| Name | Magnitude | Variability Type | Photometry Notes | Spectroscopy Notes |
|---|---|---|---|---|
| R Aqr | 5.20 | M+ZAND |
Cadence: Nightly Precision: 100 mmag |
Cadence: Not Specified Resolution: 250 Desired SNR: 100 |
Spectroscopy Lines:
No spectroscopy lines provided
Photometry Filters:
U (Johnson), B (Johnson), V (Johnson), R (Cousins), I (Cousins)
Comparison Stars:
Finder charts with comparison stars may be created using the AAVSO Variable Star Plotter (VSP).
Co-Authorship
Observers are not eligible for co-authorship.
Additional Observer Input:
Not provided
Additional Submission Location:
Not provided
Notes:
Principal Investigator: Margarita Karovska; Imported Campaign (Alert Notice #738)