Proposal #530

Proposer	(35627) Cledison Marcos da Silva (marcosdb2@outlook.com) obscode: DCMA
Assigned To	(3663) Dirk Terrell
Date Submitted	July 3, 2024
Status	Allocated
Priority	Normal
Proposal	Hello, a fellow citizen scientist asked me to submit a proposal to AAVSO for the purpose of proving an eclipsing binary and writing a paper on candidate binaries to host debris disk. Below is his text: My name is Michiharu Hyogo. I am a citizen scientist of two different projects, one is Disk Detective and another is Planet Patrol projects. I would like to obtain photometric data of a following object, BD+03 8, a spectroscopic binary. According to a following link, http://latte-online.flatironinstitute.org/app#ID=427328347, it displays that there is a clear transit signature at around the date of 2466 within the horizontal axis of this plot. The brightness decreases by approximately 4 % during the transit. Also, according to a Gaia DR3 Part 3. Non-single stars (Gaia Collaboration, 2022) catalog available in VizieR data base, the orbital period derived from Double Lined Spectroscopic binary model is about 24.36349726999916498 days. Based on these information, we have managed to compute possible dates and time of next set of transits. Here is a list describing the date, time, and location where the transit can be observed: 1. August 15th 2024, 00:40.872 (Hawaii Time) -- Probably the best time to observe from Mauna Kea. If the weather is good, we could observe the entire transit if it occurs on this night. 2. October 2nd 2024, 21:07.744 (Phoenix Time) -- The object can be observed from Arizona. The transit is scheduled to start on October 3rd, from 4:07 to around 7:38 (UTC). 3. October 27th 2024, 02:51.180 (Hawaii Time) -- The object can be observed from Mauna Kea, Hawaii, because it is more than 3 hours before sunrise and the object is higher than 35 degrees above the horizon. 4. February 26th, 2025, 21:28.360 (Christchurch Time) -- Time-wise, it can be observed from Arizona, but it will be well below the horizon in the northern hemisphere. However, it can be observed from the South Island of New Zealand, as it rises significantly higher than 35 degrees above the horizon there. 5. May 10th, 2025, 22:38.668 (Christchurch Time) -- This can also be observed from the South Island of New Zealand for the same reason. The transit is expected to last approximately about 3 hours and half. Would it beable to observe one of these computed dates of next transits. One should be suffice. According to the following link of SIMBAD, its visual magnitude (V) is 9.48. I accept suggestions for filters to be used in addition to V, if the proposal analysis team sees a need. Thanks in advance.

Targets
Target	RA (H.HH)	Dec (D.DD)	Magnitude	Telescope	Observation Frequency	Expiration Date	Proprietary Term
BD+03 8	0.158621	4.62890	9.52–9.48	BSM_NM	0	Jan. 19, 2025	No

Comments

(4726) Kenneth Menzies — July 13, 2024, 4:32 p.m.

AAVSONet scope in Hawaii and NZ not in operation at moment. May/will be in future? BSM_NM is operational.

You need to provide specific desired transit time interval (UTC) for Oct 2 transit for this to be set up.

(35627) Cledison Marcos da Silva — July 15, 2024, 1:51 p.m.

Hello, I pasted Michiharu's response below:

"Thank you very much for responding to my proposal. Your attention is greatly appreciated.

Yes, observing the object with the BSM_NM would be an excellent choice. Would it be possible for us to observe it every 30 minutes? Is this interval considered too short? The transit is scheduled to start on October 3rd, from 4:07 to around 7:38 (UTC).

I'm not entirely certain what you mean by "specific desired transit time interval," but I hope I have addressed your question. If not, could you please clarify it for me once more?

Thank you again for your comments."

(4726) Kenneth Menzies — July 23, 2024, 4:36 p.m.

Committed to NM. Hope for a clear night!

Comments on this proposal are closed.