February 2023 - vsnet-campaign-dn - ooruri.kusastro.kyoto-u.ac.jp

[vsnet-campaign-dn 16969] CSS J091017.4-200812: AM CVn-type superoutburst
by Taichi Kato 21 Feb '23

21 Feb '23

CSS J091017.4-200812: AM CVn-type superoutburst Berto Monard has reported observations. Based on a single-night run, superhumps with a period of 0.0205(1) d and amplitude of 0.07 mag were detected.

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[vsnet-campaign-dn 16967] BE Oct superoutburst
by Taichi Kato 20 Feb '23

20 Feb '23

BE Oct superoutburst YYYYMMDD(UT) mag observer 20230214.505 163 (Rod Stubbings) 20230218.453 156 (Rod Stubbings) 20230219.473 158 (Rod Stubbings)

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[vsnet-campaign-dn 16966] V392 Hya standstill
by Taichi Kato 20 Feb '23

20 Feb '23

V392 Hya standstill YYYYMMDD(UT) mag observer 20230105.2652 15.041o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230105.2872 15.018o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230105.2899 15.030o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230105.2949 15.031o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230107.0476 14.727o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230107.0496 14.741o (ATLAS … [View More]

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[vsnet-campaign-dn 16965] MGAB-V300 outburst (suspected AM CVn)
by Taichi Kato 20 Feb '23

20 Feb '23

MGAB-V300 outburst (suspected AM CVn) YYYYMMDD(UT) mag observer 20230218.5603 15.430zr (ZTF Alert DC mag (Masci+ 2019)) 20230218.5627 15.369zr (ZTF Alert DC mag (Masci+ 2019)) 20230218.5652 15.425zr (ZTF Alert DC mag (Masci+ 2019))

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[vsnet-campaign-dn 16964] Gaia23atn
by Taichi Kato 20 Feb '23

20 Feb '23

Gaia23atn Gaia23atn AT2023cgz 2023-02-17 23:48:25 343.95057 46.56566 14.67 unknown 2023-02-19 16:26:35 Transient on very faint PanSTARRS source http://gsaweb.ast.cam.ac.uk/alerts/alert/Gaia23atn/ Not seen in outburst in the past ATLAS and ZTF data.

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[vsnet-campaign-dn 16963] ASASSN-23ax: new SU UMa-type dwarf nova
by Taichi Kato 20 Feb '23

20 Feb '23

ASASSN-23ax: new SU UMa-type dwarf nova Josch Hambsch has reported observations. Superhumps with a period of 0.0545(2) d (allowing aliases) were detected (0.2 mag).

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[vsnet-campaign-dn 16962] ASASSN-23af: oscillations during long rebrightening
by Taichi Kato 20 Feb '23

20 Feb '23

ASASSN-23af: oscillations during long rebrightening Josch Hambsch has reported further observations. At least three peaks (reaching 15 mag) have been detected during the long rebrightening.

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[vsnet-campaign-dn 16961] CSSJ091017.4-200812 superoutburst (AM CVn)
by Taichi Kato 19 Feb '23

19 Feb '23

CSSJ091017.4-200812 superoutburst (AM CVn) The last recorded one in 2019. No superhump observations yet. YYYYMMDD(UT) mag observer 20230209.9779 19.079o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230210.6977 <163C (Masayuki Moriyama) 20230214.9575 14.685o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230214.9629 14.692o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230214.9667 14.671o (ATLAS Forced Photometry (Tonry+2018, … [View More]

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[vsnet-campaign-dn 16960] Re: Yamamoto-san's object = CX137 = CXO GBSJ175553.2-281633 = OGLE-BLG-ELL-12042
by Taichi Kato 19 Feb '23

19 Feb '23

> My correct location data is below. > RA 17 55 53.29 > Dec -28 16 34.1 Sorry, I copied the location of CX137 by mistake.

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[vsnet-campaign-dn 16959] Yamamoto-san's object = CX137 = CXO GBSJ175553.2-281633 = OGLE-BLG-ELL-12042
by Taichi Kato 19 Feb '23

19 Feb '23

Yamamoto-san's object = CX137 = CXO GBSJ175553.2-281633 = OGLE-BLG-ELL-12042 Itoh-san's refined astrometry: RA 17 55 53.262 DEC -28 16 33.96 The location agrees with that of CX137. This is an outburst from a 0.4-d binary with prominent ellipsoidal variations. CX137: 175553.262 -281633.96 (2000.0) Gaia_EDR3_4062657359687091584 plx=1.130(0.049) dismod=9.7 pmra=1.164(0.052) pmdec=-6.889(0.035) G=16.223 BP=16.755 RP=15.373 Yamamoto-san reported that it had brightened further in the … [View More]

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vsnet-campaign-dn February 2023