I have added it to my observing program. Regards, Josch Hambsch
----- Oorspronkelijk bericht ----- Van: "Yusuke Tampo" tampo@kusastro.kyoto-u.ac.jp Aan: "vsnet-alert" vsnet-alert@ooruri.kusastro.kyoto-u.ac.jp, "vsnet-outburst" vsnet-outburst@ooruri.kusastro.kyoto-u.ac.jp, "vsnet-campaign-dn" vsnet-campaign-dn@ooruri.kusastro.kyoto-u.ac.jp Verzonden: Zaterdag 11 januari 2025 13:43:49 Onderwerp: [vsnet-alert 28041] TCP J04272195-2528038; possibly a new AM CVn star in outburst?
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. http://www.cbat.eps.harvard.edu/unconf/followups/J04272195-2528038.html https://www.aavso.org/vsx/index.php?view=detail.top&oid=2391199
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