Coverage needed now for CSS_J024048.5+195227 in support of HST observations
Abstract:
Dr. Peter Garnavich (University of Notre Dame) and colleagues request AAVSO observers' assistance in monitoring the cataclysmic variable CSS_J024048.5+195227 in support of HST observations scheduled for: 2022 03 February 01:32:35 - 08:47:50 UT
Justification:
CSS_J024048.5+195227 is the second known 'propeller' cataclysmic variable. Gas donated by the cool secondary star is prevented from forming an accretion disk by the spinning, magnetic white dwarf. The target is seen to have ~1 mag flares caused by donated gas being shocked as it runs into the white dwarf propeller. Hubble Space Telescope will observe the target in ultraviolet. We request optical observations together to confirm its photometric state and flaring characteristics, and observations simultaneous with the HST visit to correlate optical flares with the UV data.
Requested Data Types:
Photometry
Targets
| Name | Magnitude | Variability Type | Photometry Notes | Spectroscopy Notes |
|---|---|---|---|---|
| CSS_J024048.5+195227 | 16.40 | DQ/AE+E |
Cadence: Not Specified Precision: 100 |
Not Requested |
Spectroscopy Lines:
No spectroscopy lines provided
Photometry Filters:
No photometry filters provided
Comparison Stars:
No comparison stars provided
Co-Authorship
Observers are not eligible for co-authorship.
Additional Observer Input:
Not provided
Additional Submission Location:
Not provided
Forum URL
N/A
Notes:
Principal Investigator: Dr. Peter Garnavich; Imported Campaign (Alert Notice #767)