Alert Notice 754: Monitoring requested for 15 VY Scl cataclysmic variables in support of HST observations
Active Dates: Sept. 14, 2021 – Dec. 31, 2024
Abstract:
AAVSO observers are requested to monitor 15 VY Scl novalike cataclysmic variables to support Hubble Space Telescope observations.
Justification:
HST observations need to be obtained during a low state when the white dwarf is the dominant source of light in the ultraviolet. Continuous nightly monitoring over the entire visible period is useful to detect the occurrence of a low state.
Requested Data Types:
Spectroscopy, Photometry
Targets
| Name | Magnitude | Variability Type | Photometry Notes | Spectroscopy Notes |
|---|---|---|---|---|
| VY Scl | 11.80 | NL/VY |
Cadence: Custom Precision: 100 |
Cadence: Custom Resolution: 250 Desired SNR: 100 |
| BMAM-V380 | 18.90 | UG |
Cadence: Custom Precision: 100 |
Cadence: Custom Resolution: 250 Desired SNR: 100 |
| HS 0220+0603 | 15.70 | NL/VY+E |
Cadence: Custom Precision: 100 |
Cadence: Custom Resolution: 250 Desired SNR: 100 |
| LN UMa | 14.60 | UGZ/IW+VY |
Cadence: Custom Precision: 100 |
Cadence: Custom Resolution: 250 Desired SNR: 100 |
| 1SWASP J022916.91-395901.4 | 12.80 | UGZ/IW+VY |
Cadence: Custom Precision: 100 |
Cadence: Custom Resolution: 250 Desired SNR: 100 |
| HS 0506+7725 | 14.60 | NL/VY |
Cadence: Custom Precision: 100 |
Cadence: Custom Resolution: 250 Desired SNR: 100 |
| KR Aur | 12.70 | NL/VY |
Cadence: Custom Precision: 100 |
Cadence: Custom Resolution: 250 Desired SNR: 100 |
| BMAM-V442 | 17.98 | EA/HW |
Cadence: Custom Precision: 100 |
Cadence: Custom Resolution: 250 Desired SNR: 100 |
| GS Pav | 14.80 | UGSS+E |
Cadence: Custom Precision: 100 |
Cadence: Custom Resolution: 250 Desired SNR: 100 |
| BMAM-V794 | 18.00 | UG |
Cadence: Custom Precision: 100 |
Cadence: Custom Resolution: 250 Desired SNR: 100 |
| 1RXS J233801.0+430852 | 16.05 | NL/VY |
Cadence: Custom Precision: 100 |
Cadence: Custom Resolution: 250 Desired SNR: 100 |
| BMAM-V704 | 17.20 | CV |
Cadence: Custom Precision: 100 |
Cadence: Custom Resolution: 250 Desired SNR: 100 |
| WX Ari | 14.50 | NL/VY+E |
Cadence: Custom Precision: 100 |
Cadence: Custom Resolution: 250 Desired SNR: 100 |
| V1024 Cep | 14.70 | NL/VY+E |
Cadence: Custom Precision: 100 |
Cadence: Custom Resolution: 250 Desired SNR: 100 |
| BMAM-V425 | 18.60 | RCB: |
Cadence: Custom Precision: 100 |
Cadence: Custom Resolution: 250 Desired SNR: 100 |
Spectroscopy Lines:
H-beta (4861.0 Å), H-alpha (6563.0 Å)
Photometry Filters:
V (Johnson)
Comparison Stars:
Finder charts with comparison stars may be created using the AAVSO Variable Star Plotter (VSP, https://apps.aavso.org/vsp/).
Co-Authorship
Observers are not eligible for co-authorship.
Additional Observer Input:
Cadence, filters, lines needed will depend on whether any of these targets are detected going into their low (faint) state. Monitoring a few times/week while in their bright state is requested, and multiple observations per filter per night in low state. Complete observing instructions may be found here: https://www.aavso.org/aavso-alert-notice-841-backup-copy
Additional Submission Location:
Not provided
Notes:
Principal Investigator: Drs. Anna Francesca Pala and Thomas Kupfer; Imported Campaign (Alert Notice #754)