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

[vsnet-newvar 9428] ASASSN-22lj: SU UMa star below the period minimum
by Taichi Kato 27 Sep '22

27 Sep '22

ASASSN-22lj: SU UMa star below the period minimum Josch Hambsch has reported observations. Although nightly coverage was short, the object clearly shows superhumps with an amplitude of 0.09 mag. The period (with aliases) is 0.03761(2) d, indicating that the object is likely an EI Psc star. Observations from different longitudes are desired.

1 0

[vsnet-newvar 9427] ASASSN-22lu
by Naoto Kojiguchi 23 Sep '22

23 Sep '22

ASASSN-22lu ASASSN-22lu --- ------- 5:10:46.97 -43:46:44.3 2022-09-22.24 16.56 SDSS DSS VIZIER ------- CV candidate, matches to DES g=20.9, g>17.6 on 2022-09-21.22, g=16.9 on 2022-09-22.24 051046.938 -434645.084 Gaia_DR2_4812259925999434752 Plx=0.919(0.7772) dismod=10.2 pmRA=2.557(1.803) pmDE=-7.189(1.523) G=20.543(0.019) BP-RP=0.1551 E(g-r)=-- E(B-V)=-- Ag=-- Ar=-- Ai=-- 051046.935 -434644.995 Gaia_EDR3_4812259925999434752 Plx=0.7658(0.4284) dismod=10.6 PM=6.146 pmRA=2.153(0.606) pmDE=-5.757(0.525) G=20.34165(0.015978) BP-RP=0.442415 E(g-r)=-- E(B-V)=-- Ag=-- Ar=-- Ai=-- 051046.891 -434644.936 GALEXJ051046.8-434644 FUV=21.5825(0.4516) NUV=20.6412(0.1089) 051046.932 -434645.088 DESJ051046.93-434645.0 g=21.4362 r=21.3153 i=21.2731 z=20.8001 Y=21.525 051046.938 -434645.095 DESJ051046.93-434645.0 g=20.8737 r=20.7928 i=20.86 z=20.3535 Y=20.5584 MPChecker NO DATA ASAS-SN Sky Patrol: https://asas-sn.osu.edu/sky-patrol/coordinate/88c869c3-b8fd-44b4-ad31-0280f… ASASSN-22lu 20220921.231 <16.773g ASN ASASSN-22lu 20220922.244 16.624g ASN ASASSN-22lu 20220922.244 16.706g ASN ASASSN-22lu 20220922.246 <16.787g ASN ASASSN-22lu 20220922.246 16.921g ASN ASASSN-22lu 20220922.247 16.482g ASN ASASSN-22lu 20220922.247 <16.902g ASN ASASSN-22lu 20220922.248 16.950o ATF ASASSN-22lu 20220922.251 16.981o ATF ASASSN-22lu 20220922.276 16.999o ATF ASASSN-22lu 20220922.288 16.880o ATF ASASSN-22lu 20220923.250 <16.460g ASN ASASSN-22lu 20220923.250 <16.919g ASN ASASSN-22lu 20220923.251 <16.403g ASN ASASSN-22lu 20220923.251 <16.858g ASN ASASSN-22lu 20220923.253 <16.505g ASN ASASSN-22lu 20220923.253 <16.912g ASN

1 0

[vsnet-newvar 9426] ASASSN-22ly
by Naoto Kojiguchi 23 Sep '22

23 Sep '22

ASASSN-22ly ASASSN-22ly -- ------- 16:23:16.23 -14:12:43.7 2022-09-23 16.19 SDSS DSS VIZIER ------- CV candidate, matches to PS1 g=21.7, g>18.1 on 2022-09-20.75, g=16.7 on 2022-09-22.00, g=16.6 on 2022-09-23.00 162316.272 -141244.866 Gaia_EDR3_4328966708088786688 Plx=--(--) dismod=-- PM=-- pmRA=--(--) pmDE=--(--) G=20.913553(0.057972) BP-RP=0.230354 E(g-r)=-- E(B-V)=-- Ag=-- Ar=-- Ai=-- 162316.281 -141244.148 PS1_DR1_90942458176395674 g=21.6796(0.1868) r=19.372(0.0524) i=--(--) z=--(--) y=--(--) 162316.268 -141244.837 PS1_DR1_90942458178195407 g=21.4808(0.0443) r=21.5214(0.0584) i=21.367(0.0797) z=20.6438(0.0997) y=20.3363(0.1666) 162316.267 -141244.802 SDSSJ162316.26-141244.8 u=21.728(0.176) g=21.575(0.061) r=21.439(0.073) i=21.110(0.084) z=22.298(0.761) MPChecker NO DATA ASAS-SN Sky Patrol: https://asas-sn.osu.edu/sky-patrol/coordinate/13b34540-5d6b-4d36-80f1-b5b36… #2022 outburst ASASSN-22ly 20220920.760 <16.963g ASN ASASSN-22ly 20220922.002 16.535g ASN ASASSN-22ly 20220922.003 16.555g ASN ASASSN-22ly 20220922.004 16.395g ASN ASASSN-22ly 20220923.006 16.415g ASN ASASSN-22ly 20220923.007 16.436g ASN ASASSN-22ly 20220923.008 16.276g ASN #2008 mini outburst ASASSN-22ly 20080314.330 <14.50V AS3 ASASSN-22ly 20080315.502 19.650C CRT ASASSN-22ly 20080315.507 19.610C CRT ASASSN-22ly 20080315.512 19.430C CRT ASASSN-22ly 20080315.517 19.570C CRT ASASSN-22ly 20080317.356 <14.50V AS3 ASASSN-22ly 20080320.347 <14.50V AS3 ASASSN-22ly 20080323.315 <14.50V AS3 ASASSN-22ly 20080329.370 <14.50V AS3 ASASSN-22ly 20080401.308 <14.50V AS3 ASASSN-22ly 20080404.304 <14.50V AS3 ASASSN-22ly 20080407.298 <14.50V AS3 ASASSN-22ly 20080410.286 <14.50V AS3 ASASSN-22ly 20080413.286 <14.50V AS3 ASASSN-22ly 20080413.418 19.140C CRT ASASSN-22ly 20080413.425 18.980C CRT ASASSN-22ly 20080413.431 19.000C CRT ASASSN-22ly 20080413.438 19.030C CRT ASASSN-22ly 20080415.329 <14.50V AS3 ASASSN-22ly 20080417.284 <14.50V AS3 ASASSN-22ly 20080419.285 <14.50V AS3 ASASSN-22ly 20080426.259 <14.50V AS3 ASASSN-22ly 20080429.302 <14.50:V AS3 ASASSN-22ly 20080502.230 <14.50V AS3 ASASSN-22ly 20080503.386 19.750C CRT ASASSN-22ly 20080503.392 19.500C CRT ASASSN-22ly 20080503.397 19.480C CRT ASASSN-22ly 20080503.403 19.680C CRT ASASSN-22ly 20080504.288 <14.50V AS3 ASASSN-22ly 20080506.360 <14.50V AS3 ASASSN-22ly 20080509.204 <14.50V AS3 ASASSN-22ly 20080511.245 <14.50V AS3 ASASSN-22ly 20080516.205 <14.50V AS3 ASASSN-22ly 20080523.220 <14.50V AS3 ASASSN-22ly 20080525.209 <14.50V AS3 ASASSN-22ly 20080528.366 20.400C CRT ASASSN-22ly 20080528.374 20.370C CRT ASASSN-22ly 20080528.381 20.360C CRT ASASSN-22ly 20080528.388 20.700C CRT ASASSN-22ly 20080529.274 <14.50V AS3 #2013 mini outburst ASASSN-22ly 20130429.465 <14.893V ASN ASASSN-22ly 20130502.536 21.433rP PS1 ASASSN-22ly 20130502.546 21.372rP PS1 ASASSN-22ly 20130502.568 21.470iP PS1 ASASSN-22ly 20130508.491 21.461gP PS1 ASASSN-22ly 20130508.503 21.589gP PS1 ASASSN-22ly 20130516.492 21.513gP PS1 ASASSN-22ly 20130522.425 <16.194V ASN ASASSN-22ly 20130522.427 <16.219V ASN ASASSN-22ly 20130604.316 18.500C CRT ASASSN-22ly 20130604.322 18.400C CRT ASASSN-22ly 20130604.328 18.370C CRT ASASSN-22ly 20130604.334 18.520C CRT ASASSN-22ly 20130609.392 <17.065V ASN #2021 mini outburst ASASSN-22ly 20210106.668 <16.242g ASN ASASSN-22ly 20210115.566 19.316zr ZTF ASASSN-22ly 20210115.568 19.181zr ZTF ASASSN-22ly 20210116.571 19.739zr ZTF ASASSN-22ly 20210116.573 19.410zr ZTF ASASSN-22ly 20210117.371 <16.030g ASN ASASSN-22ly 20210117.373 <15.941g ASN ASASSN-22ly 20210117.374 <15.692g ASN ASASSN-22ly 20210117.558 19.729zr ZTF ASASSN-22ly 20210117.563 19.895zr ZTF ASASSN-22ly 20210117.566 19.846zr ZTF ASASSN-22ly 20210117.568 19.969zr ZTF ASASSN-22ly 20210118.561 20.130zr ZTF ASASSN-22ly 20210118.565 20.050zr ZTF ASASSN-22ly 20210124.361 <16.783g ASN

1 0

[vsnet-newvar 9425] ASASSN-22lx
by Naoto Kojiguchi 23 Sep '22

23 Sep '22

ASASSN-22lx Large outburst amplitude of 7.5 mag. Possible WZ Sge-type object. ASASSN-22lx --- ------- 18:57:13.61 -45:57:5.3 2022-09-23.06 14.18 SDSS DSS VIZIER ------- CV candidate, no Vizier match, g>18.7 on 2022-09-21.07, g=15.4 on 2022-09-22.05, g=14.5 on 2022-09-23.05 IDs: [I/353/gsc242] The Guide Star Catalog, Version 2.4.2 (GSC2.4.2) (STScI, 2020) 185713.754 -455704.74 GSC2_SC9H092903 epoch=1976.640 Bj=22.055201 FUV=21.323 NUV=21.860 [II/335/galex_ais] Revised catalog of GALEX UV sources (GUVcat_AIS GR6+7) (Bianchi+ 2017) 185713.808 -455703.72 GALEX_J185713.8-455703 FUV=21.3233(0.1956) NUV=21.8604(0.3036) ASAS-SN Sky Patrol: https://asas-sn.osu.edu/sky-patrol/coordinate/27947cd5-5a35-4e50-bd67-f0782… ASASSN-22lx 20220919.796 20.527cy ATF ASASSN-22lx 20220921.070 17.394g ASN ASASSN-22lx 20220922.031 15.838o ATF ASASSN-22lx 20220922.054 15.114g ASN ASASSN-22lx 20220923.059 14.413g ASN

1 0

[vsnet-newvar 9424] ATLAS22beux
by Taichi Kato 21 Sep '22

21 Sep '22

ATLAS22beux https://www.aavso.org/vsx/index.php?view=detail.top&oid=2344694 There is a GALEX counterpart. 062908.682 -712937.92 (2000.0) GALEX_DR5_6385763624932083805 NUV=21.265(0.381) FUV=21.777(0.450)

1 0

[vsnet-newvar 9423] ASASSN-19zy rare outburst
by Taichi Kato 20 Sep '22

20 Sep '22

ASASSN-19zy rare outburst Past superoutburst in 2019. Superhumps were not well covered by observations. YYYYMMDD(UT) mag observer 20220913.6200 <154c (Yutaka Maeda) 20220915.6800 <167c (Yutaka Maeda) 20220919.6499 146c (Yutaka Maeda)

1 0

[vsnet-newvar 9422] ASASSN-22lj
by Taichi Kato 20 Sep '22

20 Sep '22

ASASSN-22lj Also a bright, large-amplitude dwarf nova. ASASSN-22lj -- ------- 8:24:18.55 -24:57:37.3 2022-09-18.37 12.82 SDSS DSS VIZIER ------- CV candidate, matches to PS1 g=19.5, g>17.2 on 2022-09-08.13, g=12.3 on 2022-09-14.15, g=12.5 on 2022-09-15.15, g=13.2 on 2022-09-18.37 082418.608 -245737.68 (2000.0) Gaia_DR2_5696080563913025024 plx=2.306(0.309) dismod=8.2 pmra=7.197(0.469) pmdec=-13.579(0.441) G=19.397 BP=19.320 RP=19.121 082418.608 -245737.68 (2000.0) Gaia_EDR3_5696080563913025024 plx=2.565(0.229) dismod=8.0 pmra=7.131(0.190) pmdec=-13.754(0.193) G=19.345 BP=19.443 RP=19.193

1 0

[vsnet-newvar 9421] ASASSN-22lk: bright transient
by Taichi Kato 20 Sep '22

20 Sep '22

ASASSN-22lk: bright transient ASASSN-22lk -- ------- 18:54:33.41 11:56:6.1 2022-09-18.19 11.63 SDSS DSS VIZIER ------- CV candidate, matches to PS1 g=20.5, g>17.7 on 2022-09-17.22, g=12.1 on 2022-09-18.18 185433.474 +115606.25 (2000.0) Gaia_DR2_4504346470647563008 plx=5.407(0.857) dismod=6.3 pmra=-2.475(1.526) pmdec=-18.109(2.153) G=20.298 BP=20.304 RP=19.989 185433.474 +115606.25 (2000.0) Gaia_EDR3_4504346470647563008 plx=3.328(0.642) dismod=7.4 pmra=-1.831(0.593) pmdec=-13.594(0.604) G=20.258 BP=20.417 RP=20.390

1 0

[vsnet-newvar 9420] ASASSN-22lf
by Taichi Kato 16 Sep '22

16 Sep '22

ASASSN-22lf ASASSN-22lf --- ------- 20:37:31.05 14:23:39.2 2022-09-14.38 15.34 SDSS DSS VIZIER ------- CV candidate, no Vizier match, g>17.1 on 2022-09-11.05, g=16.9 on 2022-09-12.80, g=15.7 on 2022-09-14.37, g=14.2 on 2022-09-15.13 Precursor and main outburst? Reaching mag 13. The initial outburst was too short for an ordinary dwarf nova, but might be possible for an ultrashort period binary. Amplitude too large for IP outbursts. https://asas-sn.osu.edu/sky-patrol/coordinate/8ac611f2-d397-4749-985e-5a9a9…

1 0

[vsnet-newvar 9419] Re: MASTER OT J001204.00-412337.4: fourth rebeightening
by Taichi Kato 14 Sep '22

14 Sep '22

Re: MASTER OT J001204.00-412337.4: fourth rebeightening According to observations by Josch Hambsch, the object is becoming brighter between rebeightenings. It may enter a standstill-like phase as frequently seen in AM CVn-type outbursts, but not common in hydrogen-rich system.

1 0