AAVSO -- Proposal #316

Proposer	(35150) Pradip Karmakar (pradipkarmakar39@gmail.com) obscode: KPRB
Assigned To	(3663) Dirk Terrell
Date Submitted	Feb. 11, 2023
Status	Allocated
Priority	Normal
Proposal	Dear Sir / Madam , I am an AAVSO member since 2018 and an AAVSO AMBASSADOR from India. I have been very much interested to have the CCD images of SS Leo and RR Leo for the AMBASSADOR program for the year 2023 with my school's students. I came to know that there are 8273 observations of SS Leo and 24929 observations of RR Leo data sets in the AID database. So it would be a great opportunity to observe these stars using the AAVSOnet observing facility. I would like to find out the photometric measurement of these CCD images using the VPhot package of AAVSO and upload that photometric measurements of the above RRAB-type variables to AID. After that I would like to study the present time of maximum light of these stars using Vstar involving my school's students under AMBASSADOR program. For this study I would like to get ccd images using AAVSOnet section till 2023-03-31. Hope you will guide me in this regard. With regards, Pradip Karmakar Name : Pradip Karmakar Institution of reseacher : Department of Mathematics, Madhyamgram High School (H.S.), Madhyamgram, Sodepur Road, Kolkata 700129, India. Email id (researcher) : pradipkarmakar39@gmail.com Here I have got the following information of the targets from VSX. 1) SS Leo ------------------- Variability type: RRAB VSX: 11 33 54.49 -00 02 00.0 (173.47704 -0.03333) Period: 0.6263351 d (15.03204 h) Spectral type: A7-F6 V Mag. Range: 10.420 - 11.584 V 2) RR Leo ---------------- Variability type: RRAB VSX: 10 07 43.46 +23 59 30.3 (151.93108 +23.99175) Period: 0.4524021 d (10.85765 h) Spectral type: A7-F5 V Mag. Range: 9.92 - 11.25 V CCD observations: Yes, I would like to avail CCD coverage. DSLR observations: No. I would not like to avail DSLR coberage with BGR filters. Visual observations: No. I would not like to avail visual observation coberage. Filters: I would like to avail CCD observations using Johnson V and B (if possible). Comparison and Check stars: I would like to get help about the sequence for this target from the Sequence Team. Submitting observations: I would like to get the images ( bias and dark corrected and flat filded) in my VPhot account, so that I can do the photometry of those images (.fits OR .fit format) using VPhot. I am very much eager to use Vphot for the photometric measurement.

Targets
Target	RA (H.HH)	Dec (D.DD)	Magnitude	Telescope	Observation Frequency	Expiration Date	Proprietary Term
rr leo	10.128739	23.99175	9.92–11.25	BSM_NM	1	March 31, 2023	No

Comments

(4726) Kenneth Menzies — Feb. 17, 2023, 7:25 p.m.

Pradip:

Have you thought about using available AID data to have your students measure a recent time of maximum (TOM)? VStar is a useful tool for the students to learn how to do this.

Imaging a future TOM can be conducted most efficiently IF you calculate a recent TOM in VStar and use the known period to predict a future TOM. Then we could run one short time (e.g., 2-3 hours) series on BSM_NM and virtually guarantee that you get the desired result. Does this make sense?

Simply taking a single image on several nights over the next month will not be useful for you and your students to learn anything. Comments?

Ken

(4726) Kenneth Menzies — Feb. 18, 2023, 6:50 p.m.

Committed to NM until Mar 31.

Comments on this proposal are closed.