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

[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))

1 0

[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)

1 0

[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)

1 0

[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)

1 0

[vsnet-alert 27986] TCP J07593036+0459025: new SU UMa-type dwarf nova
by Taichi Kato 31 Jan '24

31 Jan '24

TCP J07593036+0459025: new SU UMa-type dwarf nova According to the observations by Itoh-san, this object showed clear superhumps on Jan. 28 (not very apparent on preceding nights). The period is about 0.06 d. Josch Hambsch also detected superhumps on Jan. 29.

1 0

[vsnet-alert 27984] TCP J12584767-0849071 = ASASSN-24ao: new SU UMa-type dwarf nova
by Taichi Kato 29 Jan '24

29 Jan '24

TCP J12584767-0849071 = ASASSN-24ao: new SU UMa-type dwarf nova According to the observations by Itoh-san, this object showed clear superhumps on Jan. 26 (not very apparent on Jen. 24 but may have started appearing). The period is about 0.063 d. Although Josch Hambsch reported observations, the data showed unrealistic large-amplitude variations (probably due to some systematic cause) and were not used in this analysis.

2 1

[vsnet-alert 27983] ASASSN-24ah: new SU UMa (or WZ Sge) star, rebrightening and superhumps
by Taichi Kato 27 Jan '24

27 Jan '24

ASASSN-24ah: new SU UMa (or WZ Sge) star, rebrightening and superhumps This object showed a dip and rebrightening. YYYYMMDD(UT) mag observer 20240115.6584 14.67C (Masayuki Moriyama) 20240119.5520 14.97C (Masayuki Moriyama) 20240121.7547 <151C (Masayuki Moriyama) 20240121.8954 <173C (Masao Funada) 20240122.8613 <174C (Masao Funada) 20240124.5826 14.95C (Masayuki Moriyama) 20240125.5979 14.85C (Masayuki Moriyama) Observations by Tamas Tordai on Jan. 25-26 showed superhumps with a period of 0.0602(4) d and an amplitude of 0.11 mag. The object was rising on Jan. 24 in Tordai's observations. Superhumps were not apparent in observations by Itoh-san before this dip. The plateau-like phase before the dip was long enough, likely excluding a short precursor in an ordinary SU UMa star. This object may be a WZ Sge star in which early superhumps were below the detection limit during the initial outburst. The superhump period suggests a system with multiple rebrightenings if this interpretation is correct.

1 0

[vsnet-alert 27982] Re: Wils_SDSSJ091741.29+073647.4 = TCPJ09174122+0736487: new SU UMa-type dwarf nova
by Taichi Kato 15 Jan '24

15 Jan '24

Re: Wils_SDSSJ091741.29+073647.4 = TCPJ09174122+0736487: new SU UMa-type dwarf nova > Itoh-san reported observations on four nights and detected > developing superhumps since Jan. 13. The superhump period is > 0.06462(8) d (stage A or A+B combined). The current amplitude > is 0.2 mag. Josch Hambsch also reported the same object (=ASASSN-24af). The combined data (mean epoch of the data slightly earlier) yielded a longer period of 0.06487(5) d, probably more reflecting stage A superhumps.

1 0

[vsnet-alert 27981] Wils_SDSSJ091741.29+073647.4 = TCPJ09174122+0736487: new SU UMa-type dwarf nova
by Taichi Kato 15 Jan '24

15 Jan '24

Wils_SDSSJ091741.29+073647.4 = TCPJ09174122+0736487: new SU UMa-type dwarf nova Itoh-san reported observations on four nights and detected developing superhumps since Jan. 13. The superhump period is 0.06462(8) d (stage A or A+B combined). The current amplitude is 0.2 mag.

1 0

[vsnet-alert 27980] Gaia18bvd = ASASSN-24ab: new SU UMa-type dwarf nova
by Taichi Kato 10 Jan '24

10 Jan '24

Gaia18bvd = ASASSN-24ab: new SU UMa-type dwarf nova Josch Hambsch has reported observations on two nights. Superhumps with a period of 0.06363(7) d and an amplitude of 0.20 mag were clearly detected.

1 0

2025

2024

2023

2022

2021

vsnet-alert