Alert Notice 510: Observations of the symbiotic nova ASAS J174600-2321.3
Abstract:
The AAVSO is requesting observations of the symbiotic nova candidate ASAS J174600-2321.3 during the predicted upcoming eclipse of this system. Observers are asked to begin observing immediately (2015 March 5), and continue observations through the end of July 2015. Both visual and instrumental observations are encouraged; the object was at V=12.28 on 2015 February 6.764 (OCN; S. O'Connor, Bermuda). Filtered, transformed photometry in B, V, and Ic are especially encouraged, with several observations per night required during the ingress and egress phases. The project is being organized by S. Otero, P. Tisserand, K. Bernhard, and S. Hummerich, and is an extension of the research program discussed in Hummerich et al. (2015, AAVSO preprint (=eJAAVSO) #295, in press).
Justification:
The deeply eclipsing system and likely symbiotic nova ASAS J174600-2321.3 is going to enter an eclipse in mid-March. The eclipse duration is approximately 115 days. The system has shown a significant brightening cycle and is expected to go fainter than 16.9 mag (V) at mid-eclipse. Visual and CCD observations during the eclipse are required to understand the event's exact details, which haven't been documented after the primary star's brightening. Multicolour photometry is encouraged to record the colour changes.
Requested Data Types:
Photometry, Spectroscopy
Targets
| Name | Magnitude | Variability Type | Photometry Notes | Spectroscopy Notes |
|---|---|---|---|---|
| ASAS J174600-2321.3 | 11.90 | NC+EA+SR |
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: S. Otero, P. Tisserand, K. Bernhard, and S. Hummerich; Imported Campaign (Alert Notice #510)