AAVSO: American Association of Variable Star Observers

Proposal #223

Proposer (37207) Brian Ramey (ramey.brian@gmail.com) obscode: RBCA
Assigned To(3663) Dirk Terrell
Date SubmittedAug. 10, 2021

In support of Alert 750 and upcoming HST(8/26) and XMM-Newton measurements (Aug/Sept), propose nightly photometry of T CrB over next 6 weeks (prior to XMM-Newton schedule which is TBD) . Provide V,B(priority), I filter transformed photometry to AAVSO database.

Observer: RBCA
Data photometry: VPHOT
Results: Upload to AAVSO database
Target: T CrB
Mag: 9 - 10.8 (prior to eruption in estimated 5 years)
Filters + (exposure time): B(60sec), V(30 sec), I (20 sec)
Number of exposures per filter: 16
Images to be stacked, photometry performed, transformed using comp + check star
Start date: Aug 16th, 2021
End date: Sept 30th, 2021

Once HST, XMM- Newton observations are completed, project would continue at a 3 - 5 day cadence.

Proposal submitted by: Brian Ramey
Observer Code: RBCA

Target RA (H.HH) Dec (D.DD) Magnitude Telescope Observation Frequency Expiration Date Proprietary Term
T CrB 15.991713 25.92017 10.8–2.0 BSM_NH2 1 Feb. 13, 2022 No


(4726) Kenneth Menzies — Aug. 17, 2021, 5:10 p.m.

Committed to NH2 and NM.

(37207) Brian Ramey — Sept. 14, 2021, 12:36 a.m.

9/11 and 9/12 B,V,I exposures from NM2 look good for T CrB thank you!

Comments on this proposal are closed.