Proposal #708

Proposer	(3297) Thomas Rutherford (sternwachter@netscape.net) obscode: RTH
Assigned To	(3663) Dirk Terrell
Date Submitted	July 4, 2026
Status	Allocated
Priority	Normal
Proposal	My observer code is RTH and I would like to request observations of CP Gru in support of campaign #930. Observations should be in B, V, and R. The PI requests a cadence of all three filters every 30 minutes through the night so that is what I would like. To keep from tying up the telescope, I request every other night instead of nightly. Beginning date: 7/4/2026 End date: 8/30/26 Thank you-- Tom (rth)

Targets

Target Name	RA (H.HH)	Dec (D.DD)	Magnitude	Observation Frequency	Expiration Date	Proprietary Term
CP Gru	21.977156	-45.74339	8.02–7.66	5	Sept. 1, 2026	No

Plans currently in place

bsm_s/AAVSO_P708_RTH_AUTO.csv

# $Id: AAVSO_P708_RTH_AUTO.csv 5927 2026-08-05 17:48:20Z MZK $
#PROPOSAL=708
#REQUESTER=RTH,,vphot
#target,hh,mm,ss.ss,dd,mm,ss.s,desc,priority,monitor,maxX,nrepeat,bin,[filter,exposure,nexp]
CP_Gru,21,58,37.76,-45,44,36.2,CP_Gru,100,5,2,4,1,R,7.27,300,BestEfforts=1,EarliestTime=2026-07-04T00:00:00,LatestTime=2026-09-01T00:00:00

Comments

(3297) Thomas Rutherford — July 15, 2026, 12:41 a.m.

Any comment on this? one way or the other?

Thanks--

Tom (RTH)

(4726) Kenneth Menzies — July 19, 2026, 1:09 p.m.

Tom:

BTW, I think the campaign can be interpreted in several ways. 'IMHO', the campaign is hoped to be a team effort. Perhaps you could consider requesting less frequent time series such as one filter every 5-7 days for the entire night? We'll see what the TAC thinks?

Ken

(3663) Dirk Terrell — July 21, 2026, 5:04 p.m.

Since the researchers are trying to estimate the temperatures of the two stars, it would suffice to make measurements at the maxima and the minima. The main issue I see is that there is outside eclipse variability as seen in the TESS data. My experience with systems like these is that the modeling of the asymmetries is troublesome but may the TESS data can help them get a better handle on them.

(3297) Thomas Rutherford — July 22, 2026, 9:15 p.m.

I am certainly open to your suggestion of one filter every 5-7 days. What ever is doable and works for the campaign will certainly be fine with me.

Thanks.

Tom

(4726) Kenneth Menzies — July 24, 2026, 6:01 p.m.

Committed to bsm_S in R filter. Will run most of night, every 5 days if weather is good. Report how first night runs.

(4726) Kenneth Menzies — Aug. 5, 2026, 5:50 p.m.

Committed again. See if reduced exposure (7.4s) works.

(4726) Kenneth Menzies — Aug. 5, 2026, 5:51 p.m.

7.2s

Comments on this proposal are closed.