February 2022 - vsnet-newvar - ooruri.kusastro.kyoto-u.ac.jp

[vsnet-newvar 9057] CRTS J172515.5+073249: relatively rare outburst
by Taichi Kato 15 Feb '22

15 Feb '22

CRTS J172515.5+073249: relatively rare outburst YYYYMMDD(UT) mag observer 20210927.1740 20.916zg (Zwicky Transient Facility (Masci et al., 2019)) 20211014.8681 <177C (Eddy Muyllaert) 20211021.8472 <172C (Eddy Muyllaert) 20211103.8333 <163C (Eddy Muyllaert) 20220107.2938 <163C (Eddy Muyllaert) 20220213.4971 15.400zg (Zwicky Transient Facility Lasair (Masci+ 2019))

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[vsnet-newvar 9056] TCP J14420760-1758238: periodic variations
by Taichi Kato 14 Feb '22

14 Feb '22

TCP J14420760-1758238: periodic variations Observations by Itoh-san and Kiyota-san recorded periodic variations with a period of 0.0353(6) d and an amplitude of 0.04 mag. The profile somewhat looks like that of early superhumps. Since this period is too short for a hydrogen-rich WZ Sge star, further observations are needed to clarify the nature.

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[vsnet-newvar 9055] ASASSN-17jn long outburst
by Taichi Kato 13 Feb '22

13 Feb '22

ASASSN-17jn long outburst YYYYMMDD(UT) mag observer 20220121.5572 16.879zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220121.5597 16.909zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220121.5648 16.921zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220121.5673 16.918zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220211.5095 17.610zg (Zwicky Transient Facility Lasair (Masci+ 2019))

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[vsnet-newvar 9054] ASASSN-18vi most likely superoutburst (AM CVn)
by Taichi Kato 13 Feb '22

13 Feb '22

ASASSN-18vi most likely superoutburst (AM CVn) Supercycle about two years. Multiple rebrightenings in the past superoutbursts in the ZTF data. YYYYMMDD(UT) mag observer 20220211.5105 16.524zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220211.5317 16.842zr (Zwicky Transient Facility Lasair (Masci+ 2019))

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[vsnet-newvar 9053] CRTS J035318.1-034847 possible superoutburst
by Taichi Kato 13 Feb '22

13 Feb '22

CRTS J035318.1-034847 possible superoutburst Subtype based on past ZTF data. YYYYMMDD(UT) mag observer 20220212.1527 15.614zg (Zwicky Transient Facility Lasair (Masci+ 2019))

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[vsnet-newvar 9052] Re: TCP J14420760-1758238
by Taichi Kato 12 Feb '22

12 Feb '22

Re: TCP J14420760-1758238 Superoutburst reaching V=12.0 in 2001 in ASAS-3.

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[vsnet-newvar 9051] TCP J14420760-1758238
by Naoto Kojiguchi 11 Feb '22

11 Feb '22

TCP J14420760-1758238 Large outburst amplitude of 7 mag. Possible possible WZ Sge star. TCP J14420760-1758238 2022 02 11.8211* 14 42 07.60 -17 58 23.8 12.2 U Lib 9 0 2022 02 11.821 Discovered by Tadashi Kojima, Tsumagoi,Gunma-ken, Japan, on three frames(5_s exp) under limiting mag.= 13.5 taken by Canon EOS 6D + 200mm f/3.2 lens. Nothing is visible at this location taken on 2022 Feb10.809 UT under limiting mag.= 13.8,with same instrument http://www.cbat.eps.harvard.edu/unconf/followups/J14420760-1758238.html ASASSN Sky Patrol: https://asas-sn.osu.edu/sky-patrol/coordinate/d7bb8ce8-8af3-4a96-9e65-41e8d… #r=3.5arcsec 144207.822 -175822.608 PS1_DR1_86432205326582816 g=19.0939(0.011) r=19.0499(0.0136) i=18.9061(0.0115) z=18.62(0.0168) y=18.3811(0.0458) 144207.897 -175823.563 GALEXJ144207.8-175823 FUV=20.349(0.2513) NUV=19.912(0.0981) 144207.859 -175823.036 Gaia_DR2_6285355265244126080 Plx=3.4238(0.3135) pmRA=-35.799(0.743) pmDE=28.756(0.552) G=18.8162(0.0080) BP-RP=0.4707 144207.860 -175823.027 Gaia_EDR3_6285355265244126080 Plx=3.4024(0.2229) PM=45.966 pmRA=-36.297(0.228) pmDE=28.203(0.204) G=18.697046 (0.013996) BP-RP=0.537893

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[vsnet-newvar 9050] ASASSN-20pv: long rebrightening
by Taichi Kato 10 Feb '22

10 Feb '22

ASASSN-20pv: long rebrightening The object (AM CVn) is now entering a long (standstill-like) rebrightening as in the 2020-2021 superoutburst. The CCD observers are Berto Monard and Josch Hambsch.

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[vsnet-newvar 9049] ASASSN-22bs: possible early superhumps
by Taichi Kato 10 Feb '22

10 Feb '22

ASASSN-22bs: possible early superhumps The most recent data by Stephen Brincat and Josch Hambsch seem to show possible early superhumps, but the amplitude appears to be small. The signal was not very apparent in Monard's data. The large-amplitude variations (0.05 mag) recorded by T. Vanmunster on Feb. 8 were not periodic.

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[vsnet-newvar 9048] ASASSN-20pv: clear superhumps
by Taichi Kato 09 Feb '22

09 Feb '22

ASASSN-20pv: clear superhumps Berto Monard has reported further observations including the rebrightening phase. The analysis of the entire data yielded a period of 0.019106(1) d. The mean amplitude is 0.06 mag.

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