July 2022 - vsnet-alert - ooruri.kusastro.kyoto-u.ac.jp

[vsnet-alert 26876] AO Oct likely superoutburst
by Taichi Kato 22 Jul '22

22 Jul '22

AO Oct likely superoutburst YYYYMMDD(UT) mag observer 20220720.538 148 (Rod Stubbings) 20220721.582 148 (Rod Stubbings)

1 0

[vsnet-alert 26875] ASASSN-22ak outburst
by Taichi Kato 22 Jul '22

22 Jul '22

ASASSN-22ak outburst YYYYMMDD(UT) mag observer 20220720.558 154 (Rod Stubbings) 20220721.578 154 (Rod Stubbings) This object is: Subject: [vsnet-alert 26518] ASASSN-22ak: 13.2m dwarf nova in Indus

1 0

[vsnet-alert 26874] TCP J22561804+4109534 second rebrightening
by Taichi Kato 20 Jul '22

20 Jul '22

TCP J22561804+4109534 second rebrightening Tamas Tordai reported the second rebrightening on July 19-20. See [vsnet-alert 26866] It would be worth noting that the period 0.065 d is long for a WZ Sge star. If this is indeed a WZ Sge star, it must be a period bouncer.

1 0

[vsnet-alert 26873] KX Aql outburst
by Taichi Kato 18 Jul '22

18 Jul '22

KX Aql outburst Fading. Normal outburst or precursor? Last superoutburst in 2019 July. YYYYMMDD(UT) mag observer 20220714.9924 <140 (Eddy Muyllaert) 20220715.001 <149 (Gary Poyner) 20220716.0035 130 (Eddy Muyllaert) 20220716.023 129 (Gary Poyner) 20220716.569 139C (Mitsutaka Hiraga) 20220716.9563 138 (Eddy Muyllaert) 20220717.082 13.94C (Gary Poyner) 20220717.1877 13.97C (Masao Funada) 20220717.469 <126 (Tsuneo Horie) 20220717.9653 143 (Eddy Muyllaert) 20220717.989 14.35C (Gary Poyner)

1 0

[vsnet-alert 26872] TCP J22561804+V4109534 rebrightening
by FIDRICH Robert 17 Jul '22

17 Jul '22

Dear Friends, Tamás Tordai asked me to forward the following message to the list: "TCP J22561804+4109534 is rebrightening to 16.5 mag. Tamas Tordai" ... His unfiltered CCD time series uploaded into the AAVSO database. Clear skies, Robert Fidrich HAA/VSS

1 0

[vsnet-alert 26871] bright outburst of CH UMa
by FIDRICH Robert 16 Jul '22

16 Jul '22

Dear Friends, Balázs Eigner observed CH UMa in outburst: UMACH 20220715.86667 10.9 EBAA Clear skies, Robert Fidrich HAA/VSS

1 0

[vsnet-alert 26870] Re: V618 Sgr fading
by Taichi Kato 14 Jul '22

14 Jul '22

Re: V618 Sgr fading This looks like an eclipse. There were deep (more than 3 mag) fading events in 2018 Aug.-Oct. and 2020 July-Oct. A period of 710 d has been inferred. This symbiotic variable is faint at minimum and eclipses may be prominent only during outbursts when the disk becomes bright. Multicolor photometry of this eclipse may be helpful in understanding the structure of the disk.

1 0

[vsnet-alert 26869] V618 Sgr fading
by Hiroyuki Maehara 13 Jul '22

13 Jul '22

Kojima-san reported that V618 Sgr started fading. object YYYYMMDD(UT) mag code SGRV618 20220603.609 100c TKo SGRV618 20220626.568 104c TKo SGRV618 20220628.649 106c TKo Observer: Tadashi Kojima (Gunma, Japan) Instruments: f.l.=200mm lens + Canon EOS 6D ASAS-SN light curve (Shappee et al. 2014 and Kochanek et al. 2017): https://asas-sn.osu.edu/sky-patrol/coordinate/a571bdfc-1f1f-4fcb-a039-6a90c…

1 0

[vsnet-alert 26868] VY Aqr superhumps
by Taichi Kato 11 Jul '22

11 Jul '22

VY Aqr superhumps Kiyota-san detected superhumps on July 10. The object was fading on July 8 (precursor). Relatively slow rise, atypical for an SU UMa star. YYYYMMDD(UT) mag observer 20220704.9833 <138 (Eddy Muyllaert) 20220705.9819 <138 (Eddy Muyllaert) 20220707.9896 122 (Eddy Muyllaert) 20220708.0326 118 (Eddy Muyllaert) 20220708.989 10.88C (Gary Poyner) 20220709.7449 105cG (Yutaka Maeda) 20220709.7759 110C (Masayuki Moriyama) 20220709.958 10.81C (Gary Poyner) 20220710.0028 105 (Eddy Muyllaert) 20220710.0432 10.66C (Masao Funada) 20220710.049 105 (Gary Poyner) 20220710.7151 109C (Masayuki Moriyama) 20220710.940 11.24C (Gary Poyner)

1 0

[vsnet-alert 26867] CCD observations of nova PGIR22gjh = AT 2022iev
by Filipp Romanov 06 Jul '22

06 Jul '22

Observer: Filipp Romanov (Russia). Remotely using 0.61-m f/6.5 corrected Dall-Kirkham telescope of Burke-Gaffney Observatory (Canada): PGIR22gjh 20220607.14993 17.060I RFD 0.185 PGIR22gjh 20220601.18200 16.604I RFD 0.120 PGIR22gjh 20220530.19851 16.461I RFD 0.114 PGIR22gjh 20220526.20576 16.539I RFD 0.110 PGIR22gjh 20220524.19425 16.327I RFD 0.091 PGIR22gjh 20220521.19637 15.878I RFD 0.072 PGIR22gjh 20220514.27349 15.469I RFD 0.067 PGIR22gjh 20220513.24472 15.497I RFD 0.064 PGIR22gjh 20220510.22786 15.369I RFD 0.067 PGIR22gjh 20220508.23845 15.250I RFD 0.049 PGIR22gjh 20220506.23326 15.178I RFD 0.051 PGIR22gjh 20220506.23130 15.315I RFD 0.070 PGIR22gjh 20220506.23052 15.175I RFD 0.066 PGIR22gjh 20220506.22975 15.327I RFD 0.105 Animation: https://twitter.com/romanov_filipp/status/1543966861284483074

1 0