AAVSO: American Association of Variable Star Observers

Proposal #144

Proposer (4096) Juan-Luis González Carballo (struve1@gmail.com) obscode: GCJ
Assigned To(3663) Dirk Terrell
Date SubmittedJuly 11, 2020

Young star objects in open clusters with star-forming regions are one of the most suggestive fields of photometry-related work available to the advanced amateur astronomer. The need for long-term monitoring of these regions is perfectly in line with the working method of amateur astronomy, and can also be part of Pro-Am observation campaigns thanks to the initiatives developed by various institutions.

For this reason, we request the observation during the summer months (July / September 2020) of one of these objects: the Berkeley 86 open cluster (within de Cygnus X region), an object well located during this time of year in the skies of the northern hemisphere. We would be interested in multi-band photometry (BVRI), with the characteristics described below.

Our observations, in addition to being forwarded to the AAVSO database, would form part of the project led by Dr. Dirk Froebrich of the University of Kent (UK) to monitor these types of objects: HOYS Citizen Science (Hunting Outbursting Young Stars). In this way, both the AAVSO and the AAVSOnet initiative would participate in an international project that would give visibility to these Pro-Am collaboration initiatives, with the commitment that in the papers that are published as a result of this observational campaign, the express mention of AAVSO participation in this campaign.

For all these reasons, we request the use of one of the AAVSOnet telescopes as follows:

- A multiband observation (B, V, R, I and Clear) be properly corrected with the usual flats, darks, bias.
- We suggest 5 exposures of 150 seconds in each filter every night.
- We request to obtain a complete series of images every 4 nights.
- We believe that the Arizona Sonoita Research Observatory telescope is the most suitable for this purpose.

We understand that it is a reasonable proposal because it is not necessary to use the telescope for a long time every night we ask for observations.

Thank you very much and best regards,
Juan-Luis Gonzalez Carballo (GCJ)

Target RA (H.HH) Dec (D.DD) Magnitude Telescope Observation Frequency Expiration Date Proprietary Term
Berk 86 20.336667 38.69000 11.0–19.0 SRO Jan. 17, 2021 No


(3663) Dirk Terrell — July 13, 2020, 10:10 a.m.

The TAC would like some feedback on the targets of interest, in particular the magnitude range of interest.

(4096) Juan-Luis González Carballo — July 16, 2020, 4:15 a.m.

Most of the stars of the cluster are around 13-18 mag. This project measures all the field stars, not only one. For this reason I think that an exposure of 150 seconds will be the ideal to be able to measure most of them with sufficient signal/without saturation. Thanks.

(4726) Kenneth Menzies — July 21, 2020, 1:12 p.m.

Plan generated with B,V,SR,I,C. Committed to SRO. Advise when you get images after "monsoon" season?? Have also committed to BSM_NH2 without C filter. See if that works?

(4096) Juan-Luis González Carballo — July 21, 2020, 1:39 p.m.

Sorry Kenneth, I don't understand very well the two questions...

(4726) Kenneth Menzies — Dec. 9, 2020, 3:42 p.m.

Removed from scopes as requested.

Comments on this proposal are closed.