AAVSO: American Association of Variable Star Observers

Proposal #249

Proposer (37207) Brian Ramey (ramey.brian@gmail.com) obscode: RBCA
Assigned To(3663) Dirk Terrell
Date SubmittedJan. 6, 2022

In support of Alert 758:(Dr. Anna Pala) 11 dwarf novae being observed by HST in 2021-2022. February's scheduled star is V1239 Her. Request script be setup to start monitoring star daily using FSM. V1239 Her is rising early morning (@ NM lat,long) now. Would like to get an early start on this one. For 61 cm aperture this will require several stacked images (300 sec exposure minimum) to get above the requested S/N of 20. I would estimate 4-6 images with 300 sec exposure would be sufficient. She requests photometry using V filter, nightly leading up to the scheduled HST event and a few times per night the last few days prior to the schedule date. She has been sending an updated Alert # when the scheduled HST date is known. Current Mag of V1239 is 18. Type: UGSU+E

Target RA (H.HH) Dec (D.DD) Magnitude Telescope Observation Frequency Expiration Date Proprietary Term
V1239 Her 17.037014 32.49839 19.1–13.7 TMO61 July 15, 2022 No


(37207) Brian Ramey — Jan. 13, 2022, 5:35 p.m.

I've provided Ken with a ACP compatible spreadsheet that includes V1239 Her, plus remaining CVs for Alert 758 through Sept, 2022. Hoping this helps the overall effort to support Alert 758.

(4726) Kenneth Menzies — Jan. 16, 2022, 7:45 p.m.

Committed to TMO61 and MPO61

(37207) Brian Ramey — Feb. 8, 2022, 8:02 p.m.

Hi Ken,

Just emailed you the updated ACP plan .csv file. Next phase of V1239 Her, 3 nightly observations to start. I have not received any images so far of V1239 Her, so not sure if our approach is going to work. I'll keep at it....

From Dr, Anna Pala:
Coverage of V1239 Her is requested to begin now and continue through March 7, 2022. Please observe V1239 Her nightly through February 7, then 3-4 times per night through February 16, then nightly through March 7

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