vsnet-alert September 2024

vsnet-alert@ooruri.kusastro.kyoto-u.ac.jp

3 participants
3 discussions

[vsnet-alert 28020] V854 Cen Possible Fade
by Peter Williams 30 Sep '24

30 Sep '24

The RCB star V854 Cen has just recovered from a deep decline that lasted from January through July 2024. During September 2024 it gradually faded again to visual magnitude 8.1, but it is not clear if this is the onset of another deep decline. It has been cloudy for the past week here at Heathcote NSW , so I have been unable to confirm the current state of V854 Cen. A check on this star would be appreciated - thanks. Recent visual observations : CENV854 20240923.381 81 WPX CENV854 20240922.403 81 WPX CENV854 20240921.398 80 WPX CENV854 20240920.370 80 WPX CENV854 20240919.397 80 WPX CENV854 20240918.393 76 WPX CENV854 20240915.398 76 WPX CENV854 20240913.390 74 WPX CENV854 20240909.440 74 WPX CENV854 20240906.384 76 WPX CENV854 20240905.383 74 WPX CENV854 20240904.404 74 WPX CENV854 20240902.401 74 WPX CENV854 20240901.454 74 WPX CENV854 20240831.374 75 WPX Tks and regards Peter Williams Heathcote NSW 10x50mm binoculars

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[vsnet-alert 28019] TCP J17064645-3528079: new classical nova
by Yusuke Tampo 10 Sep '24

10 Sep '24

TCP J17064645-3528079: new classical nova TCP J17064645-3528079 was discovered by Koichi Itagaki on 2024-09-09.4363 UT at 11.4 mag. I reported the optical spectrum of TCP J17064645-3528079 to ATel and classified it as a new classical nova eruption. https://www.astronomerstelegram.org/?read=16808 Further observations are encouraged. Best regards, Yusuke -- ---------------------------------------------- South African Astronomical Observatory, Postdoc fellow Yusuke TAMPO MAIL: tampo(a)kusastro.kyoto-u.ac.jp MAIL: yusuke(a)saao.ac.za ----------------------------------------------

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[vsnet-alert 28018] ASASSN-24fq: new SU UMa-type dwarf nova
by tonny.vanmunster＠gmail.com 03 Sep '24

03 Sep '24

Dear colleagues, I have just finished analysing my unfiltered CCD observations of ASASSN-24fq, obtained on 2024, Aug 30/Sep 01 and Sep 01/02 at CBA Extremadura Observatory using a 0.40-m f/5.1 telescope and SX-46 CCD camera under clear skies. The resulting light curve clearly shows the presence of regular superhumps with an amplitude of 0.56 mag, establishing ASASSN-24fq as a new SU UMa-type dwarf nova. A period analysis, using the ANOVA, Lomb-Scargle, Generalized-Lomb-Scargle, PDM and Phase-binned AoV methods (Peranso 3.0) yields a combined superhump period of 0.0590 +/- 0.0002d. The object was at mag CV = 15.8 on Aug 13th. Image calibration and photometry were done using my new photometry software Phoranso 1.0.4.8, which allowed me to simultaenously measure several other variables present in the FOV of this new SU UMa-type dwarf nova. I will send my observations to AAVSO, CBA and VSNET for further analysis. Best regards Tonny --- Tonny Vanmunster CBA Belgium Observatory CBA Extremadura Observatory http://www.cbabelgium.co <http://www.cbabelgium.com/> m PERANSO : The Light Curve and Period Analysis Software http://www.peranso.co <http://www.peranso.com/> m PHORANSO: Photometric Reduction and Analysis Software *** NEW *** http://www.phoranso.com <http://www.phoranso.com/>

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vsnet-alert September 2024