Proposal #386

Proposer	(37994) Enrique T. Boeneker (heiner.boeneker@hotmail.com) obscode: BETB
Assigned To	(3663) Dirk Terrell
Date Submitted	Aug. 3, 2023
Status	Declined
Priority	Normal
Proposal	Hello everybody, I am asking here not for photometric observations (those are actually being done as we speak), but for spectroscopic observations, if they are available and feasible to carry on of course. As part of the team, Robin Leadbeater has captured, at the beginning of last year, some spectra of AS Cas. I really want a follow up set of spectra that cover from maximum to minimum brightness of this star. The epoch (JD at maximum) of it is 2459891.63619, and we have calculated with the aid of VStar using the DCDFT method a fundamental period of 3.0248 d, and a first overtone of 2.1555 d. With four or five spectra of this star will be more than enough. The idea is to confirm its spectral types at minimum and maximum. The format of spectra files can be either FITS or DAT. We are going to view them and compare them with RSpec's software. This new spectra request is only for follow up purposes, and the idea is to contrast it with our data before the paper we are about to finish is submitted to a referee of the JAAVSO. The magnitudes reported below are in Johnson's V filter. Thanks!

Targets
Target	RA (H.HH)	Dec (D.DD)	Magnitude	Telescope	Observation Frequency	Expiration Date	Proprietary Term
AS Cas	0.427172	64.23006	12.587–11.65	BSM_TX	1	—	No

(3663) Dirk Terrell — Aug. 7, 2023, 2:43 p.m.: What minimum resolution do you need?
(37994) Enrique T. Boeneker — Aug. 8, 2023, 12:55 a.m.: We used an Alpy600 slit grism spectrograph at a resolution of 12A. The idea is to compare the G band, H-gamma, H-beta and H-alpha absorption lines in order to confirm its spectral clasification during minimum, medium and maximum brightness.
(3663) Dirk Terrell — Aug. 8, 2023, 2:35 p.m.: Unfortunately we don't have that kind of resolution on any AAVSOnet telescope right now.
(37994) Enrique T. Boeneker — Aug. 8, 2023, 4 p.m.: Hello Dick. No problem. Anyway it is good to know that we are heading in that course (remote spectroscopy). Cheers and clear skies!

Comments on this proposal are closed.