May 2023 - vsnet-alert - ooruri.kusastro.kyoto-u.ac.jp

[vsnet-alert 27736] Gaia DR3 2893005857946801152 = ASASSN-23dr: most likely WZ Sge star
by Taichi Kato 12 May '23

12 May '23

Gaia DR3 2893005857946801152 = ASASSN-23dr: most likely WZ Sge star Berto Monard and Josch Hambsch have reported observations. Using Monard's data, there appears to be a period of 0.05452(5) d with a double-peaked profile. The result, however, is preliminary since the amplitude was small (0.03 mag) and observations are still limited. I used the name Gaia DR3 2893005857946801152 since this object was selected as a variable by Gaia (there was probably simply no concept of a dwarf nova in quiescence and was classified as a WD). Please feel free to use ASASSN-23dr since it is much shorter.

1 0

[vsnet-alert 27735] ASASSN-23dq ALTAS detection
by Taichi Kato 12 May '23

12 May '23

ASASSN-23dq ALTAS detection YYYYMMDD(UT) mag observer 20230508.4955 16.441o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230508.4996 16.386o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230508.5047 16.477o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021))

1 0

[vsnet-alert 27734] Re: EW Hya likely superoutburst
by Taichi Kato 12 May '23

12 May '23

Re: EW Hya likely superoutburst Recent data: YYYYMMDD(UT) mag observer 20230424.1649 19.357c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230424.1735 19.502c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230424.1852 19.551c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230425.9157 19.677o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230425.9222 19.450o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230425.9345 19.578o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230426.6131 <168C (Masayuki Moriyama) 20230506.1452 15.484o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230506.1485 15.499o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230506.1542 15.453o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230506.1673 15.452o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230506.2637 15.433o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230506.2996 15.535o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230507.8833 15.429o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230507.8871 15.345o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230507.8932 15.197o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230507.9032 15.176o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230509.1265 15.353o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230509.1294 15.403o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230509.1355 15.437o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230509.1469 15.503o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230510.8918 15.730o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230510.8947 15.723o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230510.9048 15.705o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230511.392 147 (Rod Stubbings) 20230511.617 147 (Rod Stubbings)

1 0

[vsnet-alert 27733] EW Hya likely superoutburst
by Taichi Kato 12 May '23

12 May '23

EW Hya likely superoutburst Type from past outburst. Please make time-resolved photometry! YYYYMMDD(UT) mag observer 20230426.6131 <168C (Masayuki Moriyama) 20230511.392 147 (Rod Stubbings) 20230511.617 147 (Rod Stubbings)

1 0

[vsnet-alert 27732] MASTER OT J111759.87+765131.6 superoutburst
by Taichi Kato 12 May '23

12 May '23

MASTER OT J111759.87+765131.6 superoutburst YYYYMMDD(UT) mag observer 20230423.4289 <18.233g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230423.4635 <18.508g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230424.2815 <18.894g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230425.4543 <18.314g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230426.574 <172C (Mitsutaka Hiraga) 20230426.5974 <163c (Yutaka Maeda) 20230427.6262 <143c (Yutaka Maeda) 20230501.6171 141cG (Yutaka Maeda) 20230505.2670 14.821g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230507.2470 14.882g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230507.2470 14.887g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230509.3204 15.401g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230510.5334 149cG (Yutaka Maeda)

1 0

[vsnet-alert 27731] AR Pic superoutburst
by Taichi Kato 12 May '23

12 May '23

AR Pic superoutburst YYYYMMDD(UT) mag observer 20230503.0224 <17.106g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230504.0131 16.839g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230506.7097 <17.094g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230506.7097 <17.209g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230509.0064 12.915g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230511.425 131 (Rod Stubbings)

1 0

[vsnet-alert 27730] V351 UMa outburst
by Taichi Kato 12 May '23

12 May '23

V351 UMa outburst Subtype unknonwn. No really long outburst in the past. YYYYMMDD(UT) mag observer 20230509.5977 173:C (Masayuki Moriyama) 20230509.972 <153 (Gary Poyner) 20230510.5293 154C (Masayuki Moriyama)

1 0

[vsnet-alert 27729] ZTF23aaiqwqg = ATLAS23jua = Gaia23btf: likely WZ Sge star
by Taichi Kato 12 May '23

12 May '23

ZTF23aaiqwqg = ATLAS23jua = Gaia23btf: likely WZ Sge star As judged from the light curve. YYYYMMDD(UT) mag observer 20230501.0844 16.282o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230501.0866 16.218o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230501.0894 16.199o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230501.0968 16.194o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230502.2965 16.742o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230502.3015 16.722o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230502.3028 16.899o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230502.3033 16.692o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230502.3065 16.605o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230502.3119 16.512o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230504.0483 16.977o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230504.0501 17.006o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230504.0528 17.011o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230504.0592 16.925o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230505.2944 17.154o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230505.2962 17.073o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230505.3100 17.304o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230505.3155 17.167o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230507.0577 17.496o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230507.0608 17.310o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230507.0636 17.443o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230507.0780 17.451o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230508.2362 17.440o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230508.2394 17.697o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230508.2450 17.641o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230508.2505 17.613o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230509.9939 17.664o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230509.9958 17.845o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230509.9986 17.538o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230511.3923 17.631o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230511.3955 17.602o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230511.4056 17.796o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230511.4065 17.916o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230511.4112 17.748o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021))

1 0

[vsnet-alert 27728] V1006 Cyg unusual state with frequent, short outbursts
by Taichi Kato 11 May '23

11 May '23

V1006 Cyg unusual state with frequent, short outbursts Bright quiescence. YYYYMMDD(UT) mag observer 20230325.5615 16.121g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230327.5977 16.117g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230328.5917 15.631o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230328.5949 15.535o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230328.6009 15.566o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230328.6016 15.171g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230328.6081 15.605o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230328.8512 <152c (Yutaka Maeda) 20230329.4346 15.298zr (ZTF Alert DC mag (Masci+ 2019)) 20230329.4539 15.305zr (ZTF Alert DC mag (Masci+ 2019)) 20230329.8044 158C (Masayuki Moriyama) 20230402.7739 <152c (Yutaka Maeda) 20230402.8069 168C (Masayuki Moriyama) 20230406.5952 16.480o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230406.5984 16.594o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230406.6039 16.674o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230406.6193 16.753o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230407.7803 164:c (Yutaka Maeda) 20230407.8105 164:C (Masayuki Moriyama) 20230408.4737 16.315zr (ZTF Alert DC mag (Masci+ 2019)) 20230408.4746 16.356zr (ZTF Alert DC mag (Masci+ 2019)) 20230408.7621 <160c (Yutaka Maeda) 20230408.8218 170:C (Masayuki Moriyama) 20230409.7764 <157c (Yutaka Maeda) 20230410.4309 15.518zr (ZTF Alert DC mag (Masci+ 2019)) 20230410.4381 15.526zr (ZTF Alert DC mag (Masci+ 2019)) 20230410.4734 15.451zg (ZTF Alert DC mag (Masci+ 2019)) 20230410.4901 15.479zg (ZTF Alert DC mag (Masci+ 2019)) 20230410.6037 15.525o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230410.6244 15.600o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230410.6324 15.586o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230410.6362 15.585o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230410.7743 <144c (Yutaka Maeda) 20230410.8302 156C (Masayuki Moriyama) 20230412.4894 16.040zr (ZTF Alert DC mag (Masci+ 2019)) 20230412.7475 <158c (Yutaka Maeda) 20230414.5127 16.150g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230415.8223 <163C (Masayuki Moriyama) 20230416.5907 16.804o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230416.5941 16.780o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230416.6185 16.815o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230416.6234 16.858o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230416.7432 <158c (Yutaka Maeda) 20230417.4482 16.854zr (ZTF Alert DC mag (Masci+ 2019)) 20230417.4740 16.950zg (ZTF Alert DC mag (Masci+ 2019)) 20230417.7592 <153c (Yutaka Maeda) 20230418.6162 16.149g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230420.4685 16.918zr (ZTF Alert DC mag (Masci+ 2019)) 20230420.4840 16.865zr (ZTF Alert DC mag (Masci+ 2019)) 20230421.3636 16.145g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230421.7810 <157c (Yutaka Maeda) 20230422.4339 17.298c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230422.4543 16.937zg (ZTF Alert DC mag (Masci+ 2019)) 20230422.4558 17.040c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230422.4590 17.378c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230422.4774 16.803c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230422.4783 16.456zr (ZTF Alert DC mag (Masci+ 2019)) 20230422.7552 <152c (Yutaka Maeda) 20230423.4458 16.402zr (ZTF Alert DC mag (Masci+ 2019)) 20230423.4816 16.677zg (ZTF Alert DC mag (Masci+ 2019)) 20230423.4994 15.994g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230424.4516 15.456zr (ZTF Alert DC mag (Masci+ 2019)) 20230424.4785 15.387zg (ZTF Alert DC mag (Masci+ 2019)) 20230424.5636 15.608c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230424.5654 15.552c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230424.5692 15.592c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230424.5743 15.584c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230425.4479 16.363zr (ZTF Alert DC mag (Masci+ 2019)) 20230426.5466 17.031c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230426.5498 17.006c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230426.5560 16.864c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230426.5643 17.014c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230426.7541 <156c (Yutaka Maeda) 20230427.4683 16.816zr (ZTF Alert DC mag (Masci+ 2019)) 20230427.6071 16.139g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230427.7838 <142c (Yutaka Maeda) 20230429.4727 16.834zr (ZTF Alert DC mag (Masci+ 2019)) 20230430.7628 <152c (Yutaka Maeda) 20230501.4000 16.825zr (ZTF Alert DC mag (Masci+ 2019)) 20230501.7741 <164c (Yutaka Maeda) 20230502.4221 16.608o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230502.4447 16.677o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230502.4689 16.449o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230502.4822 16.569o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230502.7063 155:c (Yutaka Maeda) 20230507.4744 15.821g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230508.5571 16.707o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230508.5670 16.593o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230508.5747 16.548o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230509.7009 158:c (Yutaka Maeda)

1 0

[vsnet-alert 27727] ASASSN-18ir likely superoutburst
by Taichi Kato 11 May '23

11 May '23

ASASSN-18ir likely superoutburst Likely supercycle around 1.5 yr (ATLAS+ASAS-SN ver2) YYYYMMDD(UT) mag observer 20230428.0703 <17.385g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230428.1142 <18.156g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230501.9907 16.861o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230501.9936 16.933o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230502.0000 16.937o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230502.1163 16.377g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230503.1351 16.307g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230503.1464 16.696o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230503.1491 16.679o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230503.1546 16.749o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021))

1 0