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

[vsnet-alert 27996] TCP J17395720-2627410 Oph = Nova Oph 2024
by Viktor Cseh 11 Mar '24

11 Mar '24

Hi all! I photographed the nova in Ophiuchus today (11-Mar-2024 06:56:19 UTC) with a telescope from Chile. I used the T70 instrument with red filter and 4×60 sec exposition time. The nova was 9,78 magnitude the integrated picture. -- *Cseh Viktor*

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[vsnet-alert 27995] TCP J03383192+2712288: new SU UMa-type (or WZ Sge-type) dwarf nova
by tonny.vanmunster＠gmail.com 11 Mar '24

11 Mar '24

Dear colleagues, I have just finished analysing my unfiltered CMOS observations of TCP J03383192+2712288 obtained on 2024, Mar 08/09 at CBA Belgium Observatory using a 0.40-m f/10.0 telescope and QHY-268M CMOS camera, and on 2024, Mar 10/11 at CBA Extremadura Observatory using a 0.40-m f/5.1 telescope and SX-46 CCD camera. In both cases, skies were not entirely clear. The resulting light curve clearly shows the presence of superhumps with an amplitude of 0.24 mag, establishing TCP J03383192+2712288 as a new SU UMa-type dwarf nova. A period analysis, using the ANOVA, Lomb-Scargle, Conditional Entropy and PDM methods (Peranso 3.0) yields a combined superhump period of 0.0542 +/- 0.0010d. The object was at mag CV = 16.4 on Mar 10th. Image calibration and photometry were done using a beta version of Phoranso. 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.co <http://www.cbabelgium.com/> m PERANSO : The Light Curve and Period Analysis Software http://www.peranso.co <http://www.peranso.com/> m PHORANSO: Photometric Reduction and Analysis Software *** NEW - COMING SOON *** http://www.phoranso.com <http://www.phoranso.com/>

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[vsnet-alert 27994] IK Leo: superhumps
by Taichi Kato 04 Mar '24

04 Mar '24

IK Leo: superhumps Itoh-san has shown that this object started showing superhumps on Mar. 2. There was some indication of growing superhumps earlier.

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[vsnet-alert 27993] TCP J13530185+0522000: new SU UMa-type (likely WZ Sge) dwarf nova
by Taichi Kato 04 Mar '24

04 Mar '24

TCP J13530185+0522000: new SU UMa-type (likely WZ Sge) dwarf nova Itoh-san has shown that this object started showing superhumps on Mar. 2. The current period is 0.06041(4) d. The amplitude is 0.13 mag. The long waiting time suggests a WZ Sge star.

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[vsnet-alert 27992] 1RXS J012750.5+380830 (UGSU:) outburst
by Kirill Sokolovsky 01 Mar '24

01 Mar '24

The dwarf nova of an uncertain subtype 1RXS J012750.5+380830 was found in outburst on the NMW ( https://scan.sai.msu.ru/nmw/ ) images obtained on 2024-02-29.7089 13.2 CV The previous outburst of 1RXS J012750.5+380830 was in October 2020 http://ooruri.kusastro.kyoto-u.ac.jp/mailarchive/vsnet-alert/24873 ASAS-SN lightcurve: https://asas-sn.osu.edu/sky-patrol/coordinate/a49973ba-269e-492f-b522-5d237… VSX record for 1RXS J012750.5+380830: https://www.aavso.org/vsx/index.php?view=detail.top&oid=132053 Best wishes, Kirill Sokolovsky, Stanislav Korotkiy, Vladimir Belousov, Nikolai Potapov

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[vsnet-alert 27991] V745 Sco brightening
by Berto Monard 29 Feb '24

29 Feb '24

For what it's worth. Possibly the start of an outburst of V745 Sco as per recent observations at KKO JD / Vj / Ic 2460353.59 17.90 13.43 2460358.59 - 13.48 2460364.58 - 13.34 2460368.59 15.88 13.06 2460369.54 15.7: 13.0: 2460369.63 15.50 12.90 Berto Monard / CBA KKO

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[vsnet-alert 27990] IK Leo: in outburst
by Kojiguchi 27 Feb '24

27 Feb '24

IK Leo: in outburst Taguch-san has reported the latest outburst of this object detected by Tomo-e on 26 Feb. 2024 . According to ASAS-SN, already started brightening on 21 Feb. 2024. Past superoutburst: Oct. 2006 Type: WZ Sge-type star with type-A (flat-long) rebrightening https://ui.adsabs.harvard.edu/abs/2008PASJ...60..227U/abstract ASAS-SN Sky Patrol: https://asas-sn.osu.edu/sky-patrol/coordinate/2d60c8fc-72f6-4867-a581-89e7f… ASAS-SN Sky Patrol 2: http://asas-sn.ifa.hawaii.edu/skypatrol/objects/661426738756 LEOIK 20240221.2340 <16.091g ASN LEOIK 20240221.2352 <16.069g ASN LEOIK 20240221.2364 <16.039g ASN LEOIK 20240221.9570 13.024g ASN LEOIK 20240221.9582 13.011g ASN LEOIK 20240221.9594 12.907g ASN LEOIK 20240226.3466 12.883g ASN LEOIK 20240226.3479 12.948g ASN LEOIK 20240226.3491 12.943g ASN LEOIK 20240226.5758 13.433o ATF LEOIK 20240226.6117 13.428o ATF LEOIK 20240226.6393 13.485o ATF ATF (ATLAS Forced Photometry (Tonry et al. 2018)) ASN (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017))

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[vsnet-alert 27989] TCP J12584767-0849071 multiple rebrightenings
by Taichi Kato 19 Feb '24

19 Feb '24

TCP J12584767-0849071 multiple rebrightenings Pointed out by Moriyama-san. YYYYMMDD(UT) mag observer 20240207.674 19.49C (Hiroshi Itoh) 20240209.8617 <168C (Masayuki Moriyama) 20240211.8582 16.60C (Masayuki Moriyama) 20240212.8399 <171C (Masayuki Moriyama) 20240213.4672 17.861zr (ZTF Alert DC mag (Masci+ 2019)) 20240215.4598 15.365zr (ZTF Alert DC mag (Masci+ 2019)) 20240216.8475 16.39C (Masayuki Moriyama) 20240217.8527 <167C (Masayuki Moriyama)

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[vsnet-alert 27988] Wils_SDSSJ091741.29+073647.4 rebrightening
by Taichi Kato 14 Feb '24

14 Feb '24

Wils_SDSSJ091741.29+073647.4 rebrightening Noted by Moriyama-san. Likely multiple rebrightenings of a WZ Sge star. YYYYMMDD(UT) mag observer 20240123.2047 <17.091g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20240124.2119 <17.124g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20240124.7493 <157C (Masayuki Moriyama) 20240125.6942 <163C (Masayuki Moriyama) 20240127.753 <172C (Hiroshi Itoh) 20240128.601 <172C (Hiroshi Itoh) 20240129.1981 16.765g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20240129.7043 15.62C (Masayuki Moriyama) 20240207.6562 16.00C (Masayuki Moriyama) 20240209.6497 <174C (Masayuki Moriyama) 20240211.6892 <179C (Masayuki Moriyama) 20240212.6605 17.39C (Masayuki Moriyama)

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[vsnet-alert 27987] ASASSN-24ah rebrightening
by Taichi Kato 13 Feb '24

13 Feb '24

ASASSN-24ah rebrightening WZ Sge star with a dip before the main superoutburst. YYYYMMDD(UT) mag observer 20240131.780 155CV (Klaus Wenzel) 20240201.772 163CV (Klaus Wenzel) 20240204.381 18.10C (Hiroshi Itoh) 20240205.746 190:CV (Klaus Wenzel) 20240207.5869 <184C (Masayuki Moriyama) 20240208.6529 <180C (Masayuki Moriyama) 20240211.747 167CV (Klaus Wenzel)

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