Proposal #365

Proposer	(37032) Eric FABRIGAT (astronomicom1@yahoo.fr) obscode: FERA
Assigned To	(3663) Dirk Terrell
Date Submitted	May 29, 2023
Status	Allocated
Priority	Normal
Proposal	Observation Use: legacy progam, low observed 1 exposure per 5 night Filter Requested: B, V, R, I Start Date : around 10/05/2023 End date : 31/10/2023 Images delivered to Vphot for analysis and upload. best regards FERA

Targets
Target	RA (H.HH)	Dec (D.DD)	Magnitude	Telescope	Observation Frequency	Expiration Date	Proprietary Term
V404 CYG	20.401060	33.86722	20.0–17.0	MPO61	5	Oct. 31, 2023	No

Comments

(3663) Dirk Terrell — June 2, 2023, 7:21 p.m.

From Arne:
"James Foster monitored this LMXB target a couple of years ago, perhaps for Alert Notice 592. The proposer should use the finding chart in that AN, as there is a very close companion. In addition to that, the data from FJQ indicates that this target lives around V=18-19 unless in outburst. So quality photometry is going to be very difficult, and will require the 60cm telescopes. In 60seconds, you can get SNR=100 on V=16 with a 60cm telescope. So to get decent signal/noise, I'd suggest at least 3x 3min at V and scale accordingly for the other filters. Perhaps the requester should get a night or two and demonstrate that they are able to use the images effectively before assigning a long-term monitoring program for this object."

(4726) Kenneth Menzies — June 4, 2023, 8:52 p.m.

Committed one night on mpo61 in V for you to check photometry. Advise if it works?

(37032) Eric FABRIGAT — Aug. 6, 2023, 12:02 p.m.

Hello, I received V images from MPO061. Photometry analysis shows behaviour around magnitude 18 in V. Photometry analysis could not be ended because there is no B images. Up to you to decide if you want to continue. best regards. FERA.

(4726) Kenneth Menzies — Aug. 7, 2023, 4:54 p.m.

Eric:

You requested this proposal. Do you want to continue? What sort of SNR did you get for the V images? The B images will be more difficult. R and I images might be acceptable. You could submit just the V data.

BTW, MPO61 had hardware problems from a lightning strike. That's why you just got images!

Ken

(37032) Eric FABRIGAT — Aug. 8, 2023, 10:54 a.m.

Hello,
the SNR is 28 for 300s exposure. that seems to be very faint/difficult target. We can stop this request, I will find another target, could you have an idea about an interresting target ? (something usefull for community).
Best regards. Eric

Comments on this proposal are closed.