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

[vsnet-alert 27337] ASASSN-V J202511.39+250535.3 large-amplitude dwarf nova state
by Taichi Kato 20 Jan '23

20 Jan '23

ASASSN-V J202511.39+250535.3 large-amplitude dwarf nova state According to Moriyama-san and ATLAS forced photometry (Tonry et al. 2018; Shingles et al. 2021), this IW And star has been showing large-amplitude dwarf nova outburst (4 mag) since 2022 (dwarf nova state in 2021 with smaller amplitudes).

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[vsnet-alert 27336] DDE 35 sudden brightening, UGZ+VY Scl
by Taichi Kato 20 Jan '23

20 Jan '23

DDE 35 sudden brightening, UGZ+VY Scl Kyoto U. team reported sudden brightening of DDE 35 on Jan. 18. Looking at ATLAS forced photometry (Tonry et al. 2018; Shingles et al. 2021), this object has been showing dwarf nova outburst since 2022. I have adopted a classification of UGZ+VY Scl. Recent data: YYYYMMDD(UT) mag observer 20230103.583 162C (Mitsutaka Hiraga) 20230107.824 164C (Mitsutaka Hiraga) 20230107.8295 159C (Masayuki Moriyama) 20230108.617 162C (Mitsutaka Hiraga) 20230110.594 166C (Mitsutaka Hiraga) 20230111.538 166C (Mitsutaka Hiraga) 20230115.5038 16.469o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230115.5057 16.812o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230115.5209 17.359o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230115.5259 16.769o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230119.5914 14.469o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230119.5951 14.484o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230119.6005 14.478o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230119.6358 14.501o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505))

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[vsnet-alert 27335] Re: 6dFg0752425-545120 outburst
by Taichi Kato 19 Jan '23

19 Jan '23

Re: 6dFg0752425-545120 outburst This was an outburst in 2022 Dec. Well captured by ATLAS -- SS Cyg-type outburst.

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[vsnet-alert 27334] ASASSN-23af = TCP J05361640-3151065 early data
by Taichi Kato 19 Jan '23

19 Jan '23

ASASSN-23af = TCP J05361640-3151065 early data YYYYMMDD(UT) mag observer 20230112.2959 <15.977g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230112.2972 <15.963g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230112.2985 <16.116g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230113.1380 14.191o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230113.1409 14.168o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230113.1471 14.153o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230113.1567 14.136o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230113.1851 13.742g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230113.1864 13.717g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230113.1876 13.702g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230113.3165 13.424g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230113.3177 13.389g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230113.3190 13.399g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230114.1580 13.635o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230114.1607 13.652o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230114.1663 13.617o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230114.1725 13.237g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230114.1738 13.262g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230114.1751 13.289g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230114.1776 13.632o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230114.2053 13.247g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230114.2065 13.271g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230114.2078 13.278g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230114.9077 13.440c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230114.9109 13.437c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230114.9145 13.460c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230114.9192 13.457c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230114.9273 13.434c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230115.8715 13.560c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230115.8746 13.537c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230115.8803 13.568c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230115.8914 13.584c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230117.1355 13.920o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230117.1393 13.963o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230117.1447 13.716o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230117.1559 13.956o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230118.1149 14.221o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230118.1190 14.232o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230118.1253 14.189o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230118.1361 14.072o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505))

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[vsnet-alert 27333] TCP J05361640-3151065 = ASASSN-23af
by Taichi Kato 19 Jan '23

19 Jan '23

TCP J05361640-3151065 = ASASSN-23af

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[vsnet-alert 27332] ASASSN-16ga (relatively) rare bright outburst
by Taichi Kato 19 Jan '23

19 Jan '23

ASASSN-16ga (relatively) rare bright outburst (Not seen in outburst by Gaia before) http://gsaweb.ast.cam.ac.uk/alerts/alert/Gaia23ahk/ Gaia23ahk AT2023ul 2023-01-15 18:44:42 232.03771 -38.26650 13.68 18.84 0.25 unknown 2023-01-17 09:25:45 Outburst in candidate CV ASASSN-16ga 152809.048 -381559.31 (2000.0) Gaia_DR2_6006561756877579776 plx=1.694(0.349) dismod=8.9 pmra=2.357(0.747) pmdec=-6.297(0.642) G=18.639 BP=18.825 RP=18.148 152809.048 -381559.31 (2000.0) Gaia_EDR3_6006561756877579776 plx=1.562(0.258) dismod=9.0 pmra=1.305(0.275) pmdec=-4.901(0.218) G=18.673 BP=18.911 RP=18.219

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[vsnet-alert 27331] 6dFg0752425-545120 outburst
by Taichi Kato 19 Jan '23

19 Jan '23

6dFg0752425-545120 outburst (SS Cyg star) http://gsaweb.ast.cam.ac.uk/alerts/alert/Gaia23ahs/ Gaia23ahs AT2022aehs 2022-12-16 08:21:30 118.17692 -54.85522 13.33 16.10 1.27 CV 2023-01-18 09:26:18 outburst in known CV 6dFGS g0752425-545120

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[vsnet-alert 27330] ASASSN-23ag
by Taichi Kato 19 Jan '23

19 Jan '23

ASASSN-23ag ASASSN-23ag --- ------- 7:43:10.54 13:6:17.7 2023-01-15.33 13.58 SDSS DSS VIZIER ------- CV candidate, matches to SDSS g=21.4, g>17.6 on 2023-01-12.25, g=13.9 on 2023-01-15.33, g=14.1 on 2023-01-16.16. ASASSN-23ag 20230112.25 <176g ASN ASASSN-23ag 20230115.23 139g ASN ASASSN-23ag 20230116.16 141g ASN 074310.574 +130618.62 (2000.0) GALEX_DR5_6378058280730625858 NUV=21.324(0.240) FUV=20.883(0.190) Itoh-san already reported observations, which did not show strong humps.

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[vsnet-alert 27329] ASASSN-23af
by Taichi Kato 19 Jan '23

19 Jan '23

ASASSN-23af ASASSN-23af --- ------- 5:36:16.38 -31:51:8.1 2023-01-13.31 13.26 SDSS DSS VIZIER ------- CV candidate, matches to DES g=20.3, g>17.1 on 2023-01-12.29, g=13.8 on 2023-01-13.18, g=13.6 on 2023-01-13.31, g=13.3 on 2023-01-14.20 ASASSN-23af 20230112.29 <171g ASN ASASSN-23af 20230113.18 138g ASN ASASSN-23af 20230114.20 133g ASN 053616.421 -315107.83 (2000.0) Gaia_DR2_2902110913736006144 plx=2.176(0.466) dismod=8.3 pmra=1.189(0.783) pmdec=-9.462(0.801) G=20.240 BP=20.196 RP=19.996 053616.421 -315107.84 (2000.0) Gaia_EDR3_2902110913736006144 plx=2.198(0.358) dismod=8.3 pmra=1.828(0.447) pmdec=-10.463(0.430) G=20.183 BP=20.264 RP=19.974

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[vsnet-alert 27328] MASTER OT J064725.70+491543.9 superoutburst
by Taichi Kato 18 Jan '23

18 Jan '23

MASTER OT J064725.70+491543.9 superoutburst Known SU UMa star. YYYYMMDD(UT) mag observer 20230107.3305 17.979zr (ZTF Alert DC mag (Masci+ 2019)) 20230107.7833 <146c (Yutaka Maeda) 20230108.6708 <165C (Masayuki Moriyama) 20230108.7384 <150c (Yutaka Maeda) 20230109.7793 <151c (Yutaka Maeda) 20230110.7574 146:cG (Yutaka Maeda) 20230116.622 137C (Mitsutaka Hiraga)

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