| Name: Sahil Purabiya |
| Affiliation: M. G. Science Institute |
| Conference ID: ASI2026_49 |
| Title: Backyard to Binary: High-Cadence Photometric Follow-Up of a WZ Sge-Type Dwarf Nova in Outburst |
| Abstract Type: Poster |
| Abstract Category: Stars, Interstellar Medium, and Astrochemistry in Milky Way |
| Author(s) and Co-Author(s) with Affiliation: Sahil Purabiya(M. G. Science Institute, Ahmedabad - 380009, India), Sayantan Bhattacharya(Tata Institute of Fundamental Research, Mumbai - 400005, India) |
| Abstract: WZ Sge-type dwarf novae are ultracompact, short-period cataclysmic variables that exhibit rare, large-amplitude outbursts and play a key role in probing the late stages of binary evolution near the period minimum, including mass transfer, angular momentum loss, and accretion disk dynamics. We conducted rapid follow up with high cadence photometric monitoring of Gaia DR3 3130088774241620608 within 4 days of its outburst detection to investigate its variability and derive fundamental system parameters. Using a 6-inch f/9 Ritchey-Chrétien telescope (Guan-Sheng Optical) and a ZWO IMX585 CMOS camera, we obtained broad band time-series observations over 11 consecutive nights from Ahmedabad, India. ANOVA period analysis
revealed a superhump period of 0.057885 day and an orbital period of 0.056513, yielding an estimated mass ratio of ≈0.114, indicative of a borderline brown-dwarf or highly evolved M-type donor. Gaia DR3 parallax places the system at a distance of ~241 pc, corresponding to an absolute magnitude of ~7.1. We estimate a disk precession period of ≈2.3843 days. This study demonstrates the scientific potential of rapid, ground-based photometry using modest amateur equipment for advancing our understanding of transient, ultracompact binary evolution. |
