Photometry of sigma Gem requested in support of TESS and CHARA observations
Abstract:
Shashank Dholakia requests AAVSO observers' assistance in monitoring the bright RS CVn-type variable sigma Gem in support of satellite-based (TESS) and ground-based observations (CHARA interferometric array). This campaign aims to test the ability of photometry to map the surfaces of stars, which can be subject to significant uncharacterized limitations.
Justification:
Sigma Gem will be observed with precision differential photometry by TESS. This opportunity will test the ability of photometry to map the surfaces of stars, which can be subject to significant uncharacterized limitations. Interferometric spot maps from CHARA will be cross compared with those from precision photometry. Multicolor photometry can potentially map stars more accurately than single-color photometry.
Requested Data Types:
Photometry
Targets
| Name | Magnitude | Variability Type | Photometry Notes | Spectroscopy Notes |
|---|---|---|---|---|
| sig Gem | 4.13 | RS |
Cadence: Not Specified Precision: 100 |
Not Requested |
Spectroscopy Lines:
No spectroscopy lines provided
Photometry Filters:
B (Johnson), V (Johnson), r (Sloan), i (Sloan)
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: Shashank Dholakia; Imported Campaign (Alert Notice #837)