Searching for Short-period Variables in M31: Method and Catalogs

Utilizing high-cadence and continuous g - and r -band data over three nights acquired from the 3.6 m Canada–France–Hawaii Telescope, aiming to find short-duration microlensing events, we conduct a systematic search for variables, transients, and asteroids across a ∼1° field of view of the Andromeda...

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Bibliographic Details
Published in:The Astrophysical journal. Supplement series 2024-07, Vol.273 (1), p.9
Main Authors: Gu, Hongrui, Yuan, Haibo, Dong, Subo, Zheng, Chenfa, Cui, Shenzhe, Ren, Yi, Fu, Haozhu, Huang, Yang, Fan, Zhou
Format: Article
Language:English
Subjects:
Andromeda Galaxy
Asteroids
Astronomy data reduction
Data acquisition
Dwarf planets
Galaxies
Gravitational microlensing
Microlenses
Milky Way
Time domain astronomy
Variable stars
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Summary:Utilizing high-cadence and continuous g - and r -band data over three nights acquired from the 3.6 m Canada–France–Hawaii Telescope, aiming to find short-duration microlensing events, we conduct a systematic search for variables, transients, and asteroids across a ∼1° field of view of the Andromeda galaxy (M31). We present a catalog of 5859 variable stars, yielding the most extensive compilation of short-period variable sources of M31. We also detected 19 flares, predominantly associated with foreground M dwarfs in the Milky Way. In addition, we discovered 17 previously unknown asteroid candidates, and we subsequently reported them to the Minor Planet Center. Lastly, we report a microlensing event candidate C-ML-1 and present a preliminary analysis.
ISSN:0067-0049
1538-4365
DOI:10.3847/1538-4365/ad45f9