Campaign on V1687 Cyg (WR 140)
Active Dates: Aug. 3, 2016 – Aug. 31, 2017
Abstract:
Dr. Noel Richardson (University of Toledo) and colleagues have requested AAVSO assistance in optical monitoring of the bright, colliding-winds binary V1687 Cyg (WR 140, HD 193793) as part of their multi-wavelength campaign on this system.
Justification:
This is the only dust-producing Wolf-Rayet binary with a fully resolved orbit (both spectroscopically and with interferometry), so all constraints we can place on the dust will allow us to better constrain the process of dust production in these systems.
Requested Data Types:
Photometry
Targets
| Name | Magnitude | Variability Type | Photometry Notes | Spectroscopy Notes |
|---|---|---|---|---|
| V1687 Cyg | 6.86 | WR |
Cadence: Not Specified Precision: 100 |
Not Requested |
Spectroscopy Lines:
No spectroscopy lines provided
Photometry Filters:
No photometry filters provided
Comparison Stars:
No comparison stars provided
Co-Authorship
Observers are not eligible for co-authorship.
Additional Observer Input:
Not provided
Additional Submission Location:
Not provided
Forum URL
N/A
Notes:
Principal Investigator: Dr. Noel Richardson; Imported Campaign (Alert Notice #546)