AAVSO: American Association of Variable Star Observers

Proposal #143

Proposer (33599) Clifford Kotnik (clkotnik@gmail.com) obscode: KCLA
Assigned To(3663) Dirk Terrell
Date SubmittedJuly 6, 2020

HIP 105217 was identified as variable by Hipparcos 30 years ago. Recent TESS full frame images allow this object to be identified as a GDOR with multiple periods of pulsation. The strongest periods are approximately 0.615 and 0.577 days. There are some indications from TESS of a period around 0.02 days (29 minutes).
I am requesting BSM images to accomplish the following:
-obtain images in multiple standard filters for these pulsations
-verify that the TESS photometry does not include the blend of multiple stars
-obtain 1 hour time series observations on some subset of nights to determine if the 0.02 d periods from TESS are real or are related to the 30 min. cadence of TESS.
I request B, V and Ic filters.

Target RA (H.HH) Dec (D.DD) Magnitude Telescope Observation Frequency Expiration Date Proprietary Term
HIP 105217 21.312400 -23.80783 8.75–8.71 BSM_S 2 Jan. 17, 2021 No


(4726) Kenneth Menzies — July 21, 2020, 12:38 p.m.

Time series plan generated and committed to BSM_S and BSM_Berry.

Comments on this proposal are closed.