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

[vsnet-alert 26921] TCP J08182007+4413553 = AT 2022sqd = ZTF22abedept
by Naoto Kojiguchi 30 Aug '22

30 Aug '22

TCP J08182007+4413553 = AT 2022sqd = ZTF22abedept Large outburst amplitude of 7.7 mag. TCP J08182007+4413553 2022 08 30.4171* 08 18 20.07 +44 13 55.3 15.0 C Lyn 0 0 http://www.cbat.eps.harvard.edu/unconf/followups/J08182007+4413553.html 2022 08 30.4171 Discovered by B.Kumar (Golden Ears Observatory Transient Survey - GEOTS) at Golden Ears Observatory, Maple Ridge, BC, Canada, in three 30-second unfiltered exposures using a 0.36-m f/2 Schmidt-Cassegrain + CCD, with magnitude 15.0 under limiting magnitude 18.0. Nothing is visible at this position on archival images taken on 2022 August 22.4670 UT (limiting mag 18.0). Discovery and Reference images can be found here: https://www.wis-tns.org/system/files/uploaded/GEOTS/tns_2022sqd_atrep_15639… TNS: https://www.wis-tns.org/object/2022sqd SDSS12: 081820.08 +441355.1 SDSSJ081820.08+441355.1 u=24.134(0.705) g=22.727(0.147) r=23.819(0.416) i=23.658(0.536) z=22.175(0.501) ZTF alert: https://lasair-ztf.lsst.ac.uk/object/ZTF22abedept https://alerce.online/object/ZTF22abedept https://mars.lco.global/?objectId=ZTF22abedept https://fink-portal.org/ZTF22abedept MPChecker: NO DATA TCPJ08182007+4413553 20220828.635 <15.700g ASN TCPJ08182007+4413553 20220829.635 14.472g ASN TCPJ08182007+4413553 20220830.4171 15.0C GEOTS TCPJ08182007+4413553 20220830.500 15.2r (ZTF Alert)

1 0

[vsnet-alert 26920] V507 Cyg: IW And-type dip following standstill
by Taichi Kato 30 Aug '22

30 Aug '22

V507 Cyg: IW And-type dip following standstill YYYYMMDD(UT) mag observer 20220719.6701 154C (Masayuki Moriyama) 20220721.7590 15.39C (Masayuki Moriyama) 20220722.8024 154C (Masayuki Moriyama) 20220723.7856 152C (Masayuki Moriyama) 20220725.8145 154C (Masayuki Moriyama) 20220726.7538 154C (Masayuki Moriyama) 20220728.5754 153C (Masayuki Moriyama) 20220801.6220 153C (Masayuki Moriyama) 20220805.7024 153C (Masayuki Moriyama) 20220807.7518 <140C (Masayuki Moriyama) 20220814.7133 <151C (Masayuki Moriyama) 20220818.5427 146C (Masayuki Moriyama) 20220821.8101 14.74C (Masayuki Moriyama) 20220822.6953 150C (Masayuki Moriyama) 20220824.7903 157C (Masayuki Moriyama) 20220825.5598 160C (Masayuki Moriyama) 20220826.7249 166C (Masayuki Moriyama) 20220827.6764 161C (Masayuki Moriyama) 20220828.7399 15.70C (Masayuki Moriyama)

1 0

[vsnet-alert 26919] Re: AT2022sfe: likely highly reddened nova
by Taichi Kato 30 Aug '22

30 Aug '22

Re: AT2022sfe: likely highly reddened nova Accoring to > https://www.wis-tns.org/object/2022sfe The Gaia object appears to be the northern component of the pair. 200029.264 +345308.30 (2000.0) Gaia_EDR3_2059315910815578496 plx=-(-) dismod=- pmra=-(-) pmdec=-(-) G=21.008 BP=21.178 RP=19.371 The location 20:00:29.256 +34:53:09.14 is very slightly different from this location. A faint object not in Gaia may be outbursting now.

1 0

[vsnet-alert 26918] AT2022sfe: likely highly reddened nova
by Taichi Kato 30 Aug '22

30 Aug '22

AT2022sfe: likely highly reddened nova Moriyama-san has pointed out the red color. YYYYMMDD(UT) mag observer 20220827.5919 15.53C (Masayuki Moriyama) 20220828.6528 15.34C (Masayuki Moriyama) 20220828.6559 14.99Rc (Masayuki Moriyama) 20220828.6576 13.51Ic (Masayuki Moriyama) 20220828.6593 <16.39B (Masayuki Moriyama) 20220828.6638 16.92:V (Masayuki Moriyama) See: https://www.wis-tns.org/object/2022sfe The object is located very close to the northern component of a close pair in the PS1 image. The Gaia object appears to be the southern component of the pair. 200029.264 +345308.30 (2000.0) Gaia_EDR3_2059315910815578496 plx=-(-) dismod=- pmra=-(-) pmdec=-(-) G=21.008 BP=21.178 RP=19.371 The outbursting object may not be related to them.

1 0

[vsnet-alert 26917] MASTER OT J001204.00-412337.4: second rebrightening
by Taichi Kato 30 Aug '22

30 Aug '22

MASTER OT J001204.00-412337.4: second rebrightening Josch Hambsch detected the second post-superoutburst rebrightening on Aug. 27.

1 0

[vsnet-alert 26916] Gaia22doh
by Taichi Kato 29 Aug '22

29 Aug '22

Gaia22doh Likely reddened nova. http://gsaweb.ast.cam.ac.uk/alerts/alert/Gaia22doh/ Gaia22doh AT2022sie 2022-08-26 05:03:03 235.24023 -54.59284 16.89 unknown 2022-08-27 20:49:03 Apparently hostless bright red transient

1 0

[vsnet-alert 26915] CRTS J131103.5-414622 outburst
by Taichi Kato 26 Aug '22

26 Aug '22

CRTS J131103.5-414622 outburst Large-amplitude outburst. Gaia22dme AT2022rus 2022-08-21 05:13:56 197.76459 -41.77282 14.27 unknown 2022-08-22 16:03:39 outburst in candidate CV SSS 110423:131104-414622 http://gsaweb.ast.cam.ac.uk/alerts/alert/Gaia22dme/

1 0

[vsnet-alert 26914] ASASSN-22jz: revised period of early superhumps
by Taichi Kato 24 Aug '22

24 Aug '22

ASASSN-22jz: revised period of early superhumps Using the period of ordinary superhumps, I re-analyzed the data reported in [vsnet-alert 26907]. The correct period of early superhumps was an one-day alias to vsnet-alert 26907. P(ESH)=0.05700(3) d.

1 0

[vsnet-alert 26911] ASASSN-22jz is another ugwz star
by Berto Monard 24 Aug '22

24 Aug '22

Unfiltered observations of ASASSN-22jz were done at CBA KKO with nightly evening sessions on dates 19 to 23 oct 2022. The last session did run to well below airmass 2. They show that after 14d into outburst, asassn-22jz has at last gone into a strong modulation mode with superhumps of 0.11CR amplitude and a period of 0.0586d +/- 0.0003d. The actual superhumps did start around 21-22 oct. The mean magnitude around 23.8 oct was 11.87CR. The amplitude of the outburst, the 2 weeks time delay between first detection and the actual superhump signature, and the periodicity all point to a ugwz classification of the object. Yet another ugwz star detected by the ASASSN survey. The predicted abundance of these type objects is getting substantiated. Berto Monard / KKO Calitzdorp South Africa

2 2

[vsnet-alert 26910] PS1-3PIJ035747.16-063851.1 = Gaia DR3 324488617195639360 = ASASSN-22kc = ZTF19abuskjw: new SU UMa-type dwarf nova
by Taichi Kato 24 Aug '22

24 Aug '22

PS1-3PIJ035747.16-063851.1 = Gaia DR3 324488617195639360 = ASASSN-22kc = ZTF19abuskjw: new SU UMa-type dwarf nova Josch Hambsch and Itoh-san have reported observations. The object shows superhumps with a period of 0.05761(3) d (amplitude 0.10 mag).

1 0

2025

2024

2023

2022

2021

vsnet-alert