View here: Details for V844 Her in outburst and photometry needed
Abstract: ONCE DECLINED STATUS IS FIXED, CHANGE DATES TO 2023 FROM 2025. CMPN IS CONCLUDED. Dr. Peter Garnavich (Notre Dame University) requests heightened coverage of the SU UMa-type cataclysmic variable V844 Her, which has gone into outburst, both to confirm the variable’s periodicity and in support of Target of Opportunity (TOO) observations scheduled with NASA’s Gehrels Swift X-ray satellite. Further to AAVSO Alert Notice 828 (July 2023), Dr. Garnavich reports that, thanks to the detection of the outburst of V844 Her by AAVSO observers, his request for the Swift TOO observations was approved, and he extends his appreciation.
Justification: The 29-minute period was not seen by TESS during quiescence, and it appears only during super-outburst. Super-outbursts occur approximately once per year and last for two weeks. The 29-minute oscillation has been marginally detected in only one archival observation in the AAVSO database. It requires long time series (multiple hours) and multiple nights of observation.