Observations requested for eclipsing binary ASASSN-21co
Active Dates: Feb. 10, 2021 – Feb. 10, 2021
Abstract:
Dr. Stella Kafka (AAVSO) requests observers' assistance in monitoring the long period eclipsing binary ASASSN-21co. Observations are requested to begin immediately to capture early features of the eclipse. Continued coverage may be requested after the eclipse is over.
Justification:
The ASAS-SN data shows a significant stellar event. Archival data from KELT suggests a period of 11.9 years with an eclipse duration of ~80 days. Little else is known about this system, so observations will help in understanding its nature.
Requested Data Types:
Photometry, Spectroscopy
Targets
| Name | Magnitude | Variability Type | Photometry Notes | Spectroscopy Notes |
|---|---|---|---|---|
| ASASSN-21co | 11.70 | EA/GS |
Cadence: Not Specified Precision: 100 |
Cadence: Not Specified Resolution: 250 Desired SNR: 100 |
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. Stella Kafka; Imported Campaign (Alert Notice #732)