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

[vsnet-newvar 9314] ASASSN-V J002356.47+424707.8: orbital period
by Taichi Kato 11 May '22

11 May '22

ASASSN-V J002356.47+424707.8: orbital period From TESS data. Porb=0.22708(1) d. Amplitude 0.033 mag.

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[vsnet-newvar 9313] ASASSN-22gr
by Taichi Kato 11 May '22

11 May '22

ASASSN-22gr ASASSN-22gr --- ------- 15:49:8.51 -62:8:20.1 2022-05-9.24 14.57 SDSS DSS VIZIER ------- CV candidate, matches to GAIA DR2 G=20.5, g>18.3 on 2022-05-01.09, g=17.3 on 2022-05-02.18, g=14.9 on 2022-05-09.23, g=15.2 on 2022-05-10.26 ASASSN-22gr 20220501.09 <183g ASN ASASSN-22gr 20220502.18 173g ASN ASASSN-22gr 20220509.23 149g ASN ASASSN-22gr 20220510.26 152g ASN

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[vsnet-newvar 9311] TCP J14225968+4122545: possible WZ Sge-type dwarf nova
by Naoto Kojiguchi 10 May '22

10 May '22

TCP J14225968+4122545: possible WZ Sge-type dwarf nova Large amplitude outburst of 8 mag. Possible WZ Sge-type dwarf nova. CBAT: TCP J14225968+4122545 2022 05 09.8119* 14 22 59.68 +41 22 54.5 12.8 C Boo R 9 2022 05 09.8119 Hanjie Tan (AUUK), Mi Zhang, Jiangao Ruan, Guoyou Sun, Jingyuan Zhao (Xingming Obs), Quanzhi Ye (UMd), Xing Gao (Xingming Obs), report the discovery of an UG candidate (12.8 CV) on several 60-s survey images (limit mag about 18.5 CV) taken by Xing Gao at Xingming Observatory “#”3 (N88) around 2022 May. 09.81186 UTC using unfiltered CCD and PAT telescope (0.3-m f/3.6 reflector). The source is approximately located at RA= 14h22m59.68s,DEC = +41d22m54.5s (equinox 2000.0), appears to correspond to object Gaia EDR3 1491978283221972224 (G=20.87) in the Gaia EDR3. Details can be found at: http://xjltp.china-vo.org/xm116ht.html http://www.cbat.eps.harvard.edu/unconf/followups/J14225968+4122545.html IDs: 142259.693 +412254.310 Gaia_DR2_1491978283221972224 Plx=1.6097(1.3294) dismod=9.0 pmRA=-6.119(2.076) pmDE=-8.789(1.912) G=20.9233(0.0154) BP-RP=0.4118 E(g-r)=0.000 E(B-V)=0.000 Ag=0.000 Ar=0.000 Ai=0.000 142259.702 +412254.455 Gaia_EDR3_1491978283221972224 Plx=1.8528(1.219) dismod=8.7 PM=11.437 pmRA=-6.603(1.48) pmDE=-9.338(1.769) G=20.8731(0.011757) BP-RP=0.258472 E(g-r)=0.000 E(B-V)=0.000 Ag=0.000 Ar=0.000 Ai=0.000 142259.692 +412254.323 PS1_DR1_157652157486948733 g=20.862(0.0386) r=20.8495(0.0349) i=21.0795(0.0404) z=21.1269(0.0794) y=--(--) 142259.704 +412254.404 PS1_DR2_157652157486948733 g=20.8563(0.02203) r=20.9597(0.024062) i=21.1843(0.021126) z=21.2248(0.051955) y=21.5224(0.1888) 142259.699 +412254.494 SDSSJ142259.69+412254.4 ObsDate=2003.2259 u=20.872(20.872) g=20.857(0.031) r=20.912(0.047) i=21.115(0.073) z=21.516(0.361) 142259.682 +412254.998 GALEXJ142259.6+412254 FUV=--(--) NUV=21.3308(0.2836) MPChecker: NO DATA ASAS-SN Sky Patrol: https://asas-sn.osu.edu/sky-patrol/coordinate/a33d3ec9-ee1b-4d51-9803-72930… TCPJ14225968+4122545 20220418.411 19.218o ATF TCPJ14225968+4122545 20220421.164 <17.771g ASN TCPJ14225968+4122545 20220422.146 <17.732g ASN TCPJ14225968+4122545 20220506.112 <16.962g ASN TCPJ14225968+4122545 20220508.115 <16.939g ASN TCPJ14225968+4122545 20220509.812 12.8C (Xingming Observatory) TCPJ14225968+4122545 20220510.378 13.651o ATF

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[vsnet-newvar 9310] ASASSN-22go
by Taichi Kato 10 May '22

10 May '22

ASASSN-22go ASASSN-22go --- ------- 11:55:6.56 -70:40:39.3 2022-05-7.04 14.55 SDSS DSS VIZIER ------- CV candidate, no Vizier match, g>18.3 on 2022-05-05.17, g=15.0 on 2022-05-07.00, g=15.4 on 2022-05-09.07, g=15.6 on 2022-05-09.17 ASASSN-22go 20220505.17 <183g ASN ASASSN-22go 20220507.00 150g ASN ASASSN-22go 20220509.07 154g ASN ASASSN-22go 20220509.17 156g ASN

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[vsnet-newvar 9309] ASASSN-20pv: second post-superoutburst plateau (AM CVn)
by Taichi Kato 10 May '22

10 May '22

ASASSN-20pv: second post-superoutburst plateau (AM CVn) YYYYMMDD(UT) mag observer 20220415.1853 15.146g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20220415.1866 15.245g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20220415.1878 15.577g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20220416.1989 15.410g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20220416.2002 15.597g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20220416.2015 15.608g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20220416.2296 <15.511g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20220416.2309 <15.407g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20220416.2321 15.514g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20220417.2074 15.008g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20220417.2086 15.025g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20220417.2099 14.961g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20220418.2103 <15.464g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20220418.2116 <15.593g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20220418.2128 14.921g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20220422.0026 14.835g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20220422.0038 15.042g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20220422.2409 15.492g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20220422.2422 15.322g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20220422.2436 15.395g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20220422.606 143 (Rod Stubbings) 20220423.2442 15.314g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20220423.2455 15.455g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20220423.2468 15.419g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20220424.2435 15.497g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20220424.592 144 (Rod Stubbings) 20220425.376 154 (Rod Stubbings) 20220425.592 143 (Rod Stubbings) 20220425.624 144 (Rod Stubbings) 20220428.560 143 (Rod Stubbings) 20220502.610 143 (Rod Stubbings) 20220502.682 143 (Rod Stubbings) 20220503.591 143 (Rod Stubbings) 20220505.562 143 (Rod Stubbings) 20220505.635 144 (Rod Stubbings) 20220505.701 144 (Rod Stubbings) 20220509.599 144 (Rod Stubbings)

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[vsnet-newvar 9308] ASASSN-22gb: stage A superhumps
by Taichi Kato 09 May '22

09 May '22

ASASSN-22gb: stage A superhumps Berto Monard and Josch Hambsch have reported further observations. The amplitudes of superhumps have been growing and the maxima were expressed by 0.05442(5) d (stage A superhumps). The long duration of stage A suggests a relatively small q.

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[vsnet-newvar 9307] ASASSN-22gm: eclipsing AM CVn star
by Taichi Kato 09 May '22

09 May '22

ASASSN-22gm: eclipsing AM CVn star Berto Monard has reported observations. I obtained the following ephemeris (single night): BJD(Min) = 2459705.53602(7) + 0.02890(3) E Eclipse depth 0.26 mag. No superhumps were detected. The orbital profile is somewhat strange in that it showed two maxima in one orbital cycle. They might be (super)hump-like variations with a period of the orbital period. The object is most likely an eclipsing AM CVn star with infrequent outbursts. Further observations are needed to see whether this was a precursor or an isolated normal outburst.

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[vsnet-newvar 9305] MASTER OT J212624.16+253827.2 likely superoutburst
by Taichi Kato 07 May '22

07 May '22

MASTER OT J212624.16+253827.2 likely superoutburst YYYYMMDD(UT) mag observer 20220402.5030 18.805zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220402.5055 18.640zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220402.5080 18.666zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220402.5105 18.844zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220405.5016 18.808zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220405.5042 18.787zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220405.5067 18.811zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220405.5118 18.856zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220409.8305 <150c (Yutaka Maeda) 20220421.8256 <145c (Yutaka Maeda) 20220502.4045 14.623zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220502.4523 14.647zg (Zwicky Transient Facility Lasair (Masci+ 2019))

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[vsnet-newvar 9304] MASTER OT J193347.47+442455.5 likely superoutburst
by Taichi Kato 07 May '22

07 May '22

MASTER OT J193347.47+442455.5 likely superoutburst Type from ZTF data. Not many superoutbursts in the past. YYYYMMDD(UT) mag observer 20220420.4488 20.184zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220420.4718 22.053zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220425.4488 19.068zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220425.4703 18.816zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220427.4306 15.563zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220427.4673 15.668zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220429.4558 15.757zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220429.4690 15.760zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220502.4098 15.926zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220502.4485 15.949zg (Zwicky Transient Facility Lasair (Masci+ 2019))

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[vsnet-newvar 9303] MASTER OT J155215.19+831424.4 possible superoutburst
by Taichi Kato 07 May '22

07 May '22

MASTER OT J155215.19+831424.4 possible superoutburst Type from ZTF data. YYYYMMDD(UT) mag observer 20220418.6094 <158c (Yutaka Maeda) 20220419.6140 <153c (Yutaka Maeda) 20220421.4282 16.070zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220421.4685 16.109zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220424.6172 <157c (Yutaka Maeda) 20220425.2789 16.193zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220425.4116 16.222zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220427.1999 16.471zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220427.2658 16.803zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220429.3873 16.638zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220501.2588 16.692zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220501.2863 16.720zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220503.3130 16.918zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220503.3676 16.787zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220503.6015 <162c (Yutaka Maeda) 20220504.5874 <153c (Yutaka Maeda)

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vsnet-newvar May 2022