AAVSO: American Association of Variable Star Observers

Proposal #290

Proposer (35150) Pradip Karmakar (pradipkarmakar39@gmail.com) obscode: KPRB
Assigned To(3663) Dirk Terrell
Date SubmittedNov. 19, 2022

Dear Sir / Madam ,
I am an AAVSO member since 2018 and an AAVSO AMBASSADOR from India.
I have been very much impressed by the Alert Notice from AAVSO about the Eclipsing Binary - V0765 Cas.
I came to know that there are only 11 (eleven - observations) data sets in the AID database. Last date of observe was " 2017 Jan. 27.83194 ". So it would be a great opportunity
to observe this star using the AAVSOnet BSM 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 Eclipsing Binary to AID.

After that I would like to study the present time of maximum light
of V0765 Cas using Vstar involving my students under

For this study I would like to get ccd images using Bright Star Monitor
(BSM) of AAVSOnet section till 2023-01-31.

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) V0765 Cas
Variability type: EA
VSX: RA: 01 19 09.05 DEC: +58 17 26.0 (19.78771 +58.29056)

Period: 1.715771 d
Spectral type: B5
V Mag. Range:
10.60 - 11.23 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 I (if possible).

Comparison and Check stars: I would like to get help about the
sequence for this target from the Sequence Team.

If possible please choose the following stars for these purpose (Comparison and Check stars):

AUID RA Dec Label V B-V
000-BJW-443 01:18:33.08 [19.63783264°] 58:22:30.5 [58.37513733°] 95 9.537 (0.035) 0.260 (0.064)
000-BJW-444 01:20:48.09 [20.20038414°] 58:20:03.2 [58.33422089°] 98 9.824 (0.036) 0.250 (0.066)

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.

Target RA (H.HH) Dec (D.DD) Magnitude Telescope Observation Frequency Expiration Date Proprietary Term
V0765 Cas 19.787710 58.29056 10.6–11.23 BSM_TX 1 Feb. 28, 2023 No


(3663) Dirk Terrell — Nov. 29, 2022, 12:29 a.m.

Suggestion to Ken is to put this on a different telescope from Kalee Tock's NGC 457 project.

(4726) Kenneth Menzies — Dec. 1, 2022, 1:48 a.m.

Committed to TX

Comments on this proposal are closed.