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

[vsnet-alert 27302] Gaia DR3 6134636930031090560 = ASASSN-23ab
by Taichi Kato 11 Jan '23

11 Jan '23

Gaia DR3 6134636930031090560 = ASASSN-23ab Bright outburst but likely an SS Cyg star. ASASSN-23ab --- ------- 13:8:59.07 -45:8:29.4 2023-01-5.28 11.72 SDSS DSS VIZIER ------- CV candidate, matches to GAIA DR3 G=16.4, g>18.0 on 2023-01-03.07, g=12.1 on 2023-01-05.28, g=13.5 on 2023-01-08.27, g=14.2 on 2023-01-09.11 Outburst in ASAS-3: YYYYMMDD(UT) mag observer 20080509.1397 <14.50V (ASAS (Pojmanski, G. 2002, Acta Astron. 52,397)) 20080511.1244 13.545V (ASAS (Pojmanski, G. 2002, Acta Astron. 52,397)) 20080513.1488 12.515V (ASAS (Pojmanski, G. 2002, Acta Astron. 52,397)) 20080515.1427 13.741V (ASAS (Pojmanski, G. 2002, Acta Astron. 52,397)) 20080517.1655 <14.50V (ASAS (Pojmanski, G. 2002, Acta Astron. 52,397))

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[vsnet-alert 27301] ASASSN-14im outburst
by Taichi Kato 11 Jan '23

11 Jan '23

ASASSN-14im outburst Large-amplitude variation in quiescence in ZTF data. YYYYMMDD(UT) mag observer 20230107.6142 <150c (Yutaka Maeda) 20230108.5412 <156c (Yutaka Maeda) 20230108.578 <177C (Mitsutaka Hiraga) 20230108.6287 <163C (Masayuki Moriyama) 20230109.5699 152:c (Yutaka Maeda)

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[vsnet-alert 27300] KZ Gem outburst
by Taichi Kato 11 Jan '23

11 Jan '23

KZ Gem outburst (SS Cyg star?) YYYYMMDD(UT) mag observer 20230102.7140 <160c (Yutaka Maeda) 20230103.7017 <154c (Yutaka Maeda) 20230104.6969 <146c (Yutaka Maeda) 20230107.7661 <142c (Yutaka Maeda) 20230108.7213 146:c (Yutaka Maeda) 20230109.1496 14.40C (Masao Funada) 20230109.7621 146:c (Yutaka Maeda) 20230110.024 14.50C (Gary Poyner) 20230110.0237 14.41C (Masao Funada)

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[vsnet-alert 27299] SS UMi superoutburst
by Taichi Kato 11 Jan '23

11 Jan '23

SS UMi superoutburst YYYYMMDD(UT) mag observer 20230102.8283 <154c (Yutaka Maeda) 20230103.8162 <152c (Yutaka Maeda) 20230107.8855 136:cG (Yutaka Maeda) 20230108.728 146C (Mitsutaka Hiraga) 20230108.8059 136:c (Yutaka Maeda) 20230108.8059 136:c (Yutaka Maeda) 20230109.267 13.75C (Gary Poyner) 20230109.8620 139c (Yutaka Maeda)

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[vsnet-alert 27298] Gaia23aeh: large-amplitude outburst of a likely premain-sequence star
by Taichi Kato 10 Jan '23

10 Jan '23

Gaia23aeh: large-amplitude outburst of a likely premain-sequence star Could be an FU Ori or EX Lup outburst? http://gsaweb.ast.cam.ac.uk/alerts/alert/Gaia23aeh/ Gaia23aeh AT2022aefx 2022-12-17 04:54:00 302.04852 30.98031 17.55 20.17 0.62 unknown 2023-01-09 12:42:53 ~3 mag rise in Gaia source in the galactic plane Gaia: 200811.641 +305849.09 (2000.0) Gaia_DR2_2029961145080697472 plx=-0.230(0.683) dismod=- pmra=-1.089(0.939) pmdec=-5.159(1.185) G=20.254 BP=21.387 RP=18.763 200811.641 +305849.09 (2000.0) Gaia_EDR3_2029961145080697472 plx=0.840(0.516) dismod=10.4 pmra=-2.341(0.446) pmdec=-4.363(0.545) G=20.241 BP=21.646 RP=19.003

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[vsnet-alert 27297] MGAB-V233 superoutburst continues
by Taichi Kato 10 Jan '23

10 Jan '23

MGAB-V233 superoutburst continues (ER UMa star) Observations of superhumps are desired. YYYYMMDD(UT) mag observer 20221220.5642 <146C (Masayuki Moriyama) 20221225.5481 156C (Masayuki Moriyama) 20230102.5135 152C (Masayuki Moriyama) 20230108.4873 15.40C (Masayuki Moriyama)

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[vsnet-alert 27296] PNVJ06245297+0208207 rapid fading
by Taichi Kato 10 Jan '23

10 Jan '23

PNVJ06245297+0208207 rapid fading According to observations by Josch Hambsch, this object was rapidly fading on Jan. 9. The behavior is typical for an AM CVn-type outburst. Superhumps will soon appear.

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[vsnet-alert 27295] CS Ind faded
by Taichi Kato 09 Jan '23

09 Jan '23

CS Ind faded Normal outburst or precursor? YYYYMMDD(UT) mag observer 20221231.482 125 (Rod Stubbings) 20230103.085 11.76C (Gary Poyner) 20230103.0866 11.81C (Masao Funada) 20230104.4336 11.899V (Filipp Romanov) 20230104.4345 11.903V (Filipp Romanov) 20230104.4354 11.888V (Filipp Romanov) 20230104.4363 11.901V (Filipp Romanov) 20230104.4372 11.894V (Filipp Romanov) 20230104.4381 11.894V (Filipp Romanov) 20230104.4390 11.897V (Filipp Romanov) 20230104.4399 11.906V (Filipp Romanov) 20230104.4408 11.901V (Filipp Romanov) 20230104.4417 11.911V (Filipp Romanov) 20230104.4426 11.910V (Filipp Romanov) 20230104.4435 11.897V (Filipp Romanov) 20230104.4444 11.906V (Filipp Romanov) 20230104.4453 11.907V (Filipp Romanov) 20230104.4462 11.900V (Filipp Romanov) 20230104.4471 11.902V (Filipp Romanov) 20230104.4480 11.898V (Filipp Romanov) 20230104.4519 11.905V (Filipp Romanov) 20230104.4528 11.909V (Filipp Romanov) 20230104.4537 11.897V (Filipp Romanov) 20230104.4546 11.892V (Filipp Romanov) 20230104.4555 11.904V (Filipp Romanov) 20230104.4564 11.895V (Filipp Romanov) 20230104.4573 11.887V (Filipp Romanov) 20230104.4582 11.888V (Filipp Romanov) 20230104.4591 11.888V (Filipp Romanov) 20230104.4600 11.899V (Filipp Romanov) 20230104.4609 11.897V (Filipp Romanov) 20230104.4618 11.902V (Filipp Romanov) 20230104.4627 11.909V (Filipp Romanov) 20230104.4636 11.898V (Filipp Romanov) 20230104.4645 11.906V (Filipp Romanov) 20230104.4654 11.898V (Filipp Romanov) 20230104.4663 11.898V (Filipp Romanov) 20230104.4672 11.898V (Filipp Romanov) 20230104.4681 11.889V (Filipp Romanov) 20230104.4690 11.878V (Filipp Romanov) 20230104.4699 11.888V (Filipp Romanov) 20230105.478 118 (Rod Stubbings) 20230106.501 118 (Rod Stubbings) 20230107.4329 12.347V (Filipp Romanov) 20230107.4338 12.352V (Filipp Romanov) 20230107.4347 12.344V (Filipp Romanov) 20230107.4356 12.348V (Filipp Romanov) 20230107.4365 12.356V (Filipp Romanov) 20230107.4374 12.344V (Filipp Romanov) 20230107.4383 12.343V (Filipp Romanov) 20230107.4392 12.362V (Filipp Romanov) 20230107.4401 12.340V (Filipp Romanov) 20230107.4410 12.352V (Filipp Romanov) 20230107.4419 12.351V (Filipp Romanov) 20230107.4428 12.340V (Filipp Romanov) 20230107.4437 12.353V (Filipp Romanov) 20230107.4446 12.356V (Filipp Romanov) 20230107.4455 12.352V (Filipp Romanov) 20230107.4464 12.360V (Filipp Romanov) 20230107.4473 12.345V (Filipp Romanov) 20230107.4482 12.362V (Filipp Romanov) 20230107.4521 12.346V (Filipp Romanov) 20230107.4530 12.363V (Filipp Romanov) 20230107.4539 12.364V (Filipp Romanov) 20230107.4548 12.370V (Filipp Romanov) 20230107.4557 12.377V (Filipp Romanov) 20230107.4566 12.363V (Filipp Romanov) 20230107.4575 12.367V (Filipp Romanov) 20230107.4584 12.360V (Filipp Romanov) 20230107.4593 12.354V (Filipp Romanov) 20230107.4602 12.363V (Filipp Romanov) 20230107.4611 12.352V (Filipp Romanov) 20230107.4620 12.360V (Filipp Romanov) 20230107.4629 12.347V (Filipp Romanov) 20230107.4638 12.351V (Filipp Romanov) 20230107.4647 12.338V (Filipp Romanov) 20230107.4656 12.356V (Filipp Romanov) 20230107.4665 12.348V (Filipp Romanov) 20230107.4674 12.355V (Filipp Romanov) 20230107.4683 12.357V (Filipp Romanov) 20230107.4692 12.364V (Filipp Romanov) 20230107.4701 12.378V (Filipp Romanov) 20230107.4710 12.366V (Filipp Romanov) 20230107.481 122 (Rod Stubbings) 20230108.460 130 (Rod Stubbings)

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[vsnet-alert 27294] 4C +31.03
by meineko 08 Jan '23

08 Jan '23

4C +31.03 is blazer, recently reported gamma-ray-flare by Ciprini et al. (ATel #15841). In my CCD images, it is also bright in optical wavelength. 2459948.9066 11.70 Ic 2459948.9061 12.12 Rc 2459948.9057 12.45 V with 0.25mSCT + QSI 632ws CCD at Kamagaya, Japan https://meineko.com/ccd/4C30.03-outburst.jpg Seiichiro Kiyota VSOLJ

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[vsnet-alert 27293] GI Mon: currently dwarf nova
by Taichi Kato 08 Jan '23

08 Jan '23

GI Mon: currently dwarf nova Using ATLAS forced photometry (Tonry et al. 2018; Shingles et al. 2021), I found that this object is currently a dwarf nova with 1 mag amplitude (see also vsnet-chat 8458). The light curve since 2019 resembles an IW And star (heartbeat state). The current cycle length is about 70 d.

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