TCP J04272195-2528038; possibly a new AM CVn star in outburst?
TCP J04272195-2528038 was discovered by Y. Nakamura on 2025-01-09.4837 UT at 14.2 mag. The quiescence counterpart is g_PS1=21.09(5) mag, thus outburst amplitude is ~7 mag.
Itoh-san and myself using the SAAO/Lesedi telescope have reported the time-resolved observations. The SAAO data shows a possible double-peaked modulation with a period of ~42.6 min.
In addition, the optical spectrum I obtained with the 1.9m telescope at the SAAO shows only the He I absorption lines, lacking any significant Balmer emission/absorption lines.
Further observations are encouraged to establish its classification and determine the variation period.
Best regards,
Yusuke
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South African Astronomical Observatory, Postdoc fellow
反保 雄介 Yusuke TAMPO
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