September 2021 - vsnet-chat - ooruri.kusastro.kyoto-u.ac.jp

[vsnet-chat 8835] ZTF J194703.11+510444.6: R
by Taichi Kato 10 Sep '21

10 Sep '21

ZTF J194703.11+510444.6: R From ZTF data. Sinusoidal, blue and faint (M_V= +7.3). 194703.1 +510444 (2000.0) ATOJ296.7629+51.0790 SINE c=16.947 o=17.191 P(LS)=0.080996 rms=0.18 194703.1 +510444 (2000.0) ZTFJ194703.11+510444.6 RSCVN g=16.881 r=17.227 amp=0.361 P=0.0810253 194703.1 +510444 (2000.0) ZTFJ194703.11+510444.7 r=17.222 (16.951-17.487) P=0.0810 194703.108 +510444.68 (2000.0) Gaia_DR2_2135442243331252608 plx=1.059(0.078) dismod=9.9 pmra=-5.330(0.143) pmdec=-17.873(0.132) G=16.941 BP=16.748 RP=16.987 194703.107 +510444.67 (2000.0) Gaia_EDR3_2135442243331252608 plx=1.190(0.048) dismod=9.6 pmra=-5.095(0.057) pmdec=-17.898(0.053) G=16.925 BP=16.839 RP=16.989

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[vsnet-chat 8834] MGAB-V1215: NL
by Taichi Kato 10 Sep '21

10 Sep '21

MGAB-V1215: NL From ZTF data. Flickering in ZTF time-resolved data. 2MASS 222849.866 +501011.31 (2000.0) 16.037 15.945 15.493 222849.8 +501011 (2000.0) ATOJ337.2078+50.1698 dubious c=16.804 o=16.728 P(LS)=0.42829 rms=0.20 222849.8 +501011 (2000.0) Gaia_DR2_2000174314233682944 DR2_STS g=16.786(0.161) Mowlavi2020 222849.8 +501011 (2000.0) ZTFJ222849.88+501011.3 susp g=16.866 r=16.769 amp=0.290 P=0.7527900 logfalse=-6.472 222849.8 +501011 (2000.0) ZTFJ222849.89+501011.3 g=16.879 (16.485-17.356) P=0.7530 222849.8 +501011 (2000.0) Gaia_DR2_2000174314233682944 DR2_STS g=16.786(0.161) Mowlavi2020 222849.889 +501011.30 (2000.0) Gaia_DR2_2000174314233682816 plx=0.565(0.072) dismod=11.2 pmra=-4.486(0.122) pmdec=-8.634(0.110) G=16.786 BP=16.872 RP=16.505 222849.889 +501011.30 (2000.0) Gaia_EDR3_2000174314233682816 plx=0.565(0.049) dismod=11.2 pmra=-4.186(0.054) pmdec=-8.669(0.048) G=16.740 BP=16.840 RP=16.463

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[vsnet-chat 8833] ATO J301.7597+49.8319: Z Cam star
by Taichi Kato 10 Sep '21

10 Sep '21

ATO J301.7597+49.8319: Z Cam star From ZTF data. Dwarf nova state in 2019 (cycle about 15 d). Standstill since 2020. 2MASS 200702.298 +494954.87 (2000.0) 16.105 16.031 15.290 200702.3 +494955 (2000.0) ATOJ301.7597+49.8319 dubious c=16.204 o=16.156 P(LS)=0.29352 rms=0.15 200702.3 +494955 (2000.0) ZTFJ200702.33+494955.2 g=16.543 (16.174-16.755) P=0.9363 200702.333 +494955.15 (2000.0) Gaia_DR2_2087842980517605248 plx=0.594(0.063) dismod=11.1 pmra=0.419(0.117) pmdec=-6.315(0.113) G=16.605 BP=16.625 RP=16.468 200702.333 +494955.14 (2000.0) Gaia_EDR3_2087842980517605248 plx=0.562(0.042) dismod=11.3 pmra=0.520(0.048) pmdec=-6.447(0.047) G=16.583 BP=16.656 RP=16.413

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[vsnet-chat 8832] ZTF J183304.06+463705.2: R
by Taichi Kato 10 Sep '21

10 Sep '21

ZTF J183304.06+463705.2: R Almost purely sinusoidal (ZTF data), blue and faint (M_V = +6.4). The period has been confirmed. 183304.064 +463705.15 (2000.0) Gaia_DR2_2118607522015143936 plx=1.347(0.053) dismod=9.4 pmra=-7.238(0.112) pmdec=-14.468(0.123) G=15.753 BP=15.543 RP=15.912 183304.063 +463705.14 (2000.0) Gaia_EDR3_2118607522015143936 plx=1.433(0.030) dismod=9.2 pmra=-7.044(0.039) pmdec=-14.531(0.045) G=15.699 BP=15.572 RP=15.885

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[vsnet-chat 8831] ATO J297.1584+46.3857: NL
by Taichi Kato 10 Sep '21

10 Sep '21

ATO J297.1584+46.3857: NL Type from ZTF data. Also flickering in ZTF time-resolved data.

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[vsnet-chat 8830] ATO J152.5043+16.0448: Z Cam (IW And) star
by Taichi Kato 10 Sep '21

10 Sep '21

ATO J152.5043+16.0448: Z Cam (IW And) star Standstill in 2021 Mar., terminated by brightening (ZTF data). Only one event, but the star is likely an IW And star.

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[vsnet-chat 8829] ASASSN-V J194125.07+152255.4: probably not AM
by Taichi Kato 09 Sep '21

09 Sep '21

ASASSN-V J194125.07+152255.4: probably not AM https://www.aavso.org/vsx/index.php?view=detail.top&oid=602546 Too blue for a polar. Quiescent nearby SU UMa star? 194125.006 +152254.55 (2000.0) Gaia_DR2_4318508939464901760 plx=4.607(0.084) dismod=6.7 pmra=-43.730(0.120) pmdec=-48.479(0.114) G=16.819 BP=16.696 RP=16.717 194125.004 +152254.52 (2000.0) Gaia_EDR3_4318508939464901760 plx=4.639(0.059) dismod=6.7 pmra=-43.613(0.050) pmdec=-48.398(0.052) G=16.960 BP=16.892 RP=16.785

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[vsnet-chat 8828] ASASSN-15hv: likely SU UMa star
by Taichi Kato 08 Sep '21

08 Sep '21

ASASSN-15hv: likely SU UMa star ASAS-SN data: https://asas-sn.osu.edu/sky-patrol/coordinate/e5b3b12e-5e6b-4809-a69d-7015a… Superoutburst in 2015 Sep. + precursor + rebrightening. Other normal outbursts were also present. Bright (13.8 at max) and overlooked DN.

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[vsnet-chat 8827] CRTS J022732.9+130617 refined period
by Taichi Kato 08 Sep '21

08 Sep '21

CRTS J022732.9+130617 refined period Porb=0.1577987(1) d from ZTF data. Eclipses 3 mag deep. Hump not apparent.

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[vsnet-chat 8826] 3XMMJ000511.8+634018 refined period
by Taichi Kato 08 Sep '21

08 Sep '21

3XMMJ000511.8+634018 refined period Polar with two poles. Porb=0.0927005(2) d from ZTF data.

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vsnet-chat September 2021