[vsnet-alert 25921] Re: TCP J09430280+2758080: dwarf nova outburst (mag. 13.9) in Leo

[Naoto Kojiguchi]

Based on the orbital period, no outbursts in the past, and the outburst profile,
this object could be an SU UMa object with an orbital period longer than 3 hours, such as ASASSN-14ho and Mis V1448.

These objects have the long delay time(~10 days) of superhump appearance.

On 2021/05/31 19:04, Patrick Schmeer pasc1312-aavso at yahoo.de via vsnet-alert wrote:
>   TCP J09430280+2758080 (UGSS:)
> https://www.aavso.org/vsx/index.php?view=detail.top&oid=2222715
>
> Prior to Nakamura-san's discovery this transient was automatically detected
> by ASAS-SN - and reported (albeit not publicly) on 2021 May 30.1633 UT.
> An ASAS-SN Transients name is not yet (publicly) available.
>   
> Complete ASAS-SN Sky Patrol light curve and data:
> https://asas-sn.osu.edu/sky-patrol/coordinate/4f80ce1a-703f-4377-8774-a9925dc7e02a
>   
> Time-resolved photometry is encouraged.
>   
> Clear skies,
> Patrick
> --------------
> References:
> All-Sky Automated Survey for Supernovae (ASAS-SN) Sky Patrol:
> - Shappee et al., 2014ApJ...788...48S
> - Kochanek et al., 2017PASP..129j4502K
> --------------
> Am Montag, 31. Mai 2021, 02:18:43 MESZ hat Naoto Kojiguchi Folgendes geschrieben:
>
> TCP J09430280+2758080
>
> No past outburst in the ASAS-SN and CRTS data.
>
> TCP J09430280+2758080   2021 05 30.4968*  09 43 02.80 +27 58 08.0  14.2 U             Leo       9 0
>
> 2021 05 30.4968
> Discovered by Yuji Nakamura, Kameyama, Mie, Japan, on two frames (15-s exp. limiting mag 15.5)
> taken by 10cm/F3.0 refractor and CMOS camera. Nothing is visible at this location on the frames
> taken on 2021 May 22.5123 UT (15-s exp. limiting mag 15.5) by same instrument.
>
> TCPJ09430280+2758080 20210527.150 <15.197g ASN
> TCPJ09430280+2758080 20210528.262 13.841g ASN
> TCPJ09430280+2758080 20210529.171 13.977g ASN
> TCPJ09430280+2758080 20210530.170 14.300g ASN
> TCPJ09430280+2758080 20210530.4968 14.2C (Yuji Nakamura)
> ...
>