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

[vsnet-alert 26954] TCPJ23580961+5502508: new WZ Sge-type dwarf nova
by Yusuke Tampo 30 Sep '22

30 Sep '22

TCPJ23580961+5502508: new WZ Sge-type dwarf nova Kyoto Univ. Obs. observed TCPJ23580961+5502508 on 30th Sep. We detected early superhumps with a period of ~0.060 d, and an amplitude of 0.2 mag! Therefore TCPJ23580961+5502508 is a new WZ Sge-type dwarf nova, and also has one of the largest early superhump amplitude. Follow-up photometry is strongly encouraged. Best,Yusuke -- ---------------------------------------------- Kyoto University, Graduate School of Department of Astronomy, PhD student Yusuke TAMPO MAIL: tampo(a)kusastro.kyoto-u.ac.jp ----------------------------------------------

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[vsnet-alert 26953] TCP J23580961+5502508
by Naoto Kojiguchi 30 Sep '22

30 Sep '22

TCP J23580961+5502508 Large outburst amplitude of 8.7 mag. Possible WZ Sge-type dwarf nova. TCP J23580961+5502508 2022 09 30.4363* 23 58 09.61 +55 02 50.8 12.0 U Cas 9 0 http://www.cbat.eps.harvard.edu/unconf/followups/J23580961+5502508.html 2022 09 30.436 Discovered by Tadashi Kojima, Tsumagoi,Gunma-ken, Japan, on three frames(5_s exp) under limiting mag.= 13.5 taken by Canon EOS 6D digital camera + 135mm f/3.5 lens. Nothing is visible at this location taken on 2022 Sep29.601 UT under limiting mag.= 14.2, Mag=13.5 taken by Canon EOS 6D digital camera +200mm f3.2lens. 2022 09 30.549 Mag.= 12.0, position end figures 09s.58, 50".3 observed by T. Noguchi, Katori, Japan, using 0.23-m f/10 Schmidt-Cassegrain + unfiltered CCD (KAF-0261E), An image at http://park8.wakwak.com/~ngc/images/TCPinCas_20220930.jpg. 2022 09 30.4435 Yuji Nakamura, Kameyama, Mie, Japan, found this TCP on two frames (6 sec exp. limiting mag 13.5) taken by 135mm/F4.0 lens and CMOS camera. Mag.= 12.2, position end figures 09s.54, 49".9. Nothing is visible at this location on the frames taken on 2022 Sep. 26.4587 UT (6 sec exp. limiting mag 13.5) by same instrument. --- Isao Endoh (NAOJ) IDs: 235809.604 +550250.329 Gaia_DR2_1993876650919517440 Plx=-1.3305(1.2667) dismod=-- pmRA=-6.965(2.818) pmDE=-26.213(1.222) G=20.6889(0.0112) BP-RP=0.5106 E(g-r)=-- E(B-V)=-- Ag=-- Ar=-- Ai=-- 235809.629 +550250.684 Gaia_EDR3_1993876650919517440 Plx=2.4918(0.8465) dismod=8.0 PM=26.721 pmRA=-13.58(1.081) pmDE=-23.013(0.697) G=20.611666(0.008471) BP-RP=0.426098 E(g-r)=0.110 E(B-V)=0.097 Ag=0.387 Ar=0.288 Ai=0.217 235809.572 +550248.802 PS1_DR1_174053595400396965 g=--(--) r=--(--) i=--(--) z=20.6374(0.0806) y=--(--) 235809.610 +550250.321 PS1_DR1_174053595401147507 g=20.7349(0.0215) r=20.7017(0.0399) i=20.7022(0.0305) z=20.6861(0.0456) y=--(--) ASAS-SN Sky Patrol: https://asas-sn.osu.edu/sky-patrol/coordinate/2cea05a1-2534-4aae-9a9e-6cc26… MPChecker: NO DATA YYYYMMDD(UT) mag code 20220926.4587 <13.5C (Yuji Nakamura) 20220927.609 20.539cy ATF 20220928.343 <17.329g ASN 20220928.344 <17.398g ASN 20220928.346 <17.327g ASN 20220929.430 19.115o ATF 20220929.434 19.325o ATF 20220929.439 19.241o ATF 20220929.601 <14.2C (Tadashi Kojima) 20220930.436 12.0C (Tadashi Kojima) 20220930.4435 12.2C (Yuji Nakamura) 20220930.549 12.0C (Toshihide Noguchi)

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[vsnet-alert 26950] WX Cet rare outburst!
by Rod Stubbings 30 Sep '22

30 Sep '22

WX Cet is rising to a rare outburst! CETWX 220929.511 <160 Stu.RASNZ CETWX 220930.506 144 Stu.RASNZ CETWX 220930.528 140 Stu.RASNZ CETWX 220930.553 138 Stu.RASNZ Regards, Rod. -- Rod Stubbings Tetoora Road Observatory Victoria, Australia Telescope: "Infinity" 22" f/3.8 stubbo(a)dcsi.net.au http://rodstubbingsobservatory.wordpress.com/

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[vsnet-alert 26951] EF Peg outburst
by Hiroyuki Maehara 30 Sep '22

30 Sep '22

Visual magnitude estimates by VSOLJ members object YYYYMMDD(UT) mag code PEGEF 20220930.622 133 Mhh.VSOLJ PEGEF 20220930.654 130 Mhh.VSOLJ Observer: Hiroyuki Maehara (Okayama, Japan) Instruments: 30cmL

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[vsnet-alert 26949] MASTER OT J001204.00-412337.4: sixth rebrightening
by Taichi Kato 30 Sep '22

30 Sep '22

MASTER OT J001204.00-412337.4: sixth rebrightening Josch Hambsch detected another rebrightening on Sep. 29 (15.9 mag).

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[vsnet-alert 26865] TCP J22561804+4109534: new WZ Sge-type dwarf nova
by tonny.vanmunster＠gmail.com 30 Sep '22

30 Sep '22

Dear colleagues, I have just finished analysing my unfiltered CCD observations of TCP J22561804+4109534, obtained on 2022, July 04/05 at CBA Belgium Observatory, using a 0.40-m f/10.0 telescope and QHY-286M CMOS camera under clear skies. I have been observing this object during multiple nights between June 27th and now. On all previous nights, no obvious modulations were visible in the light curve, except for last night when superhumps with an amplitude of 0.14 mag became very clearly visible. A period analysis using the ANOVA, Lomb-Scargle, Generalized-Lomb-Scargle and PDM methods (Peranso 3.0), yields a combined superhump period of 0.0650 +/- 0.0011d. The object was at mag CV = 15.3 on Jul 05th. The superhump profile shows no signs of a double-waved pattern, and I could not detect early superhumps in my data. Yet, the large outburst amplitude of ~7.4 mag, and the long time for superhumps to develop (approx. 9 days) make this a very likely WZ Sge-type dwarf nova. Follow-up observations are recommended to further track the evolution of the superhumps. I will send my observations to AAVSO, CBA and VSNET for further analysis. Best regards Tonny --- Tonny Vanmunster CBA Belgium Observatory CBA Extremadura Observatory http://www.cbabelgium.com PERANSO : The Light Curve and Period Analysis Software http://www.peranso.com ____________________________________________________________ Center for Backyard Astrophysics (CBA) mailing lists https://cbastro.org/communications/mailing-lists/

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[vsnet-alert 26947] ASASSN-19abr outburst
by Taichi Kato 29 Sep '22

29 Sep '22

ASASSN-19abr outburst YYYYMMDD(UT) mag observer 20220914.5495 <154c (Yutaka Maeda) 20220915.5800 <158c (Yutaka Maeda) 20220919.5428 <154c (Yutaka Maeda) 20220920.5683 <160c (Yutaka Maeda) 20220927.512 153C (Mitsutaka Hiraga)

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[vsnet-alert 26946] MASTER OT J053628.39+135341.7: likely superoutburst
by Taichi Kato 29 Sep '22

29 Sep '22

MASTER OT J053628.39+135341.7: likely superoutburst Type from ZTF data. The 2020 Jan. superoutburst had a precursor. YYYYMMDD(UT) mag observer 20220919.4041 16.617zg (ZTF Alert DC mag (Masci+ 2019)) 20220919.4874 16.572zg (ZTF Alert DC mag (Masci+ 2019)) 20220921.4699 16.499zg (ZTF Alert DC mag (Masci+ 2019)) 20220924.4648 16.752zr (ZTF Alert DC mag (Masci+ 2019)) 20220924.5015 16.864zg (ZTF Alert DC mag (Masci+ 2019)) 20220926.4459 17.232zg (ZTF Alert DC mag (Masci+ 2019))

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[vsnet-alert 26945] ASASSN-16cz likely superoutburst
by Taichi Kato 28 Sep '22

28 Sep '22

ASASSN-16cz likely superoutburst Type from ZTF data. The 2020 Oct. superoutburst was followed by a rebrightening.

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[vsnet-alert 26944] RY Sgr fading rapidly
by Taichi Kato 28 Sep '22

28 Sep '22

RY Sgr fading rapidly YYYYMMDD(UT) mag observer 20220814.512 71 (Masashi Nakatani) 20220818.510 71 (Noriaki Onodera) 20220818.510 75 (Masashi Nakatani) 20220819.508 72 (Noriaki Onodera) 20220821.528 73 (Noriaki Onodera) 20220827.6028 8.05V (Masayuki Moriyama) 20220828.500 77 (Noriaki Onodera) 20220830.137 8.01TG (Gary Poyner) 20220831.194 7.78TG (Gary Poyner) 20220831.8785 79 (Jose Ripero) 20220903.201 7.64TG (Gary Poyner) 20220903.8750 74 (Jose Ripero) 20220908.425 72 (Hiroyuki Maehara) 20220912.460 74 (Noriaki Onodera) 20220912.499 72 (Hiroyuki Maehara) 20220916.514 77 (Noriaki Onodera) 20220917.467 78 (Noriaki Onodera) 20220920.8646 84 (Jose Ripero) 20220921.460 80 (Noriaki Onodera) 20220926.451 94 (Noriaki Onodera) 20220926.8646 97 (Jose Ripero)

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