HT Cas

Special Notice #89: Rare Outburst of 0103+59 HT Cas

January 10, 2008

Coordinates: RA 01:10:12.98 Dec. +60:04:35.9 (2000.0)

AAVSO observer Glenn Chaple, Townsend, MA, reports that the UGSS+EA type dwarf nova HT Cas is in outburst for the first time since February 2002, with his visual observation of 13.6 on January 10.0076 UT. Makoto Uemura and colleagues at Hiroshima University (vsnet-alert 9807) confirmed the outburst with an observation of 14.02V on January 10.5278 UT. This outburst looks to be a normal, brief outburst, probably lasting only 2-3 days.

Tags

AAVSO Special Notice

HT Cas

eclipsing

cataclysmic variable

AAVSO International Database

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Alert Notice 154: Possible Nova in Sagittarius [V4157 Sgr] AND New Request to monitor high-glalactic latitude cataclysmic variables for IUE observing runs

THE AMERICAN ASSOCIATION OF VARIABLE STAR OBSERVERS
25 Birch Street, Cambridge, MA 02138 USA
BITNET: aavso@cfa SPAN: cfa::aavso
INTERNET: aavso@cfa.harvard.edu
Tel. 617-354-0484 FAX 617-354-0665

AAVSO ALERT NOTICE 154 (February 14, 1992)

POSSIBLE NOVA IN SAGITTARIUS [V4157 Sgr]

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Read more about Alert Notice 154: Possible Nova in Sagittarius [V4157 Sgr] AND New Request to monitor high-glalactic latitude cataclysmic variables for IUE observing runs

Alert Notice 564: 21 Cataclysmic variables to be observed by William Herschel Telescope

December 12, 2016: Roque Ruiz-Carmona (Ph.D. candidate, Institute of Mathematics, Astrophysics and Particle Physics, Radboud University Nijmegen, The Netherlands) has requested AAVSO assistance with his campaign to observe a set of 21 cataclysmic variables (CVs) with the William Herschel Telescope (WHT) at La Palma on 2016 December 16.

Tags

2MASS J00353571+4623524

PTFS1500bs

2MASS J00382703+2509250

HT Cas

1RXS J011013.6+600431

PTFS1501br

CSS 081220:011614+092216

MASTER OT J042609.34+354144.8

PTFS1204h

CSS 100218:043829+004016

CSS 080306:082655-000733

SDSS J092207.56+310314.4

PTFS1609t

SDSS J093249.57+472523.0

PTFS1509ao

SDSS J094002.56+274942.0

PTFS1509as

DV UMa

PTFS1510aw

SDSS J100658.40+233724.4

PTFS1310as

IY UMa

William Herschel Telescope

AAVSO International Database

front page news

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Alert Notice (un-numbered February 1, 1980): Special Alert Notice [dwarf novae]

February 1, 1980

THE AMERICAN ASSOCIATION OF VARIABLE STAR OBSERVERS
187 Concord Avenue, Cambridge, MA 02138 USA
Tel. 617-354-0484

SPECIAL ALERT NOTICE

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Read more about Alert Notice (un-numbered February 1, 1980): Special Alert Notice [dwarf novae]

Alert Notice 192: Outburst of IP Peg AND Request for observations of HT Cas, UX UMa, and IP Peg AND Outburst of UZ Boo continues AND Outburst of SS Cyg

THE AMERICAN ASSOCIATION OF VARIABLE STAR OBSERVERS
25 Birch Street, Cambridge, MA 02138 USA
BITNET: aavso@cfa SPAN: cfa::aavso
INTERNET: aavso@cfa.harvard.edu
Tel. 617-354-0484 FAX 617-354-0665

AAVSO ALERT NOTICE 192 (August 29, 1994)

OUTBURST OF 2318+17 IP PEGASI

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AAVSO International Database

AAVSO Alert Notice

Read more about Alert Notice 192: Outburst of IP Peg AND Request for observations of HT Cas, UX UMa, and IP Peg AND Outburst of UZ Boo continues AND Outburst of SS Cyg

Alert Notice 217: Brightening of 0059+53 Nova Cassiopeiae 1995 AND Request to monitor dwarf nova 0103+59 HT Cassiopeiae AND Request to monitor 2138+43 SS Cygni [V723 Cas]

THE AMERICAN ASSOCIATION OF VARIABLE STAR OBSERVERS
25 Birch Street, Cambridge, MA 02138 USA
INTERNET: aavso@aavso.org
Tel. 617-354-0484 FAX 617-354-0665

AAVSO ALERT NOTICE 217 (November 16,1995)

BRIGHTENING OF 0059+53 NOVA CASSIOPEIAE 1995

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AAVSO International Database

AAVSO Alert Notice

Read more about Alert Notice 217: Brightening of 0059+53 Nova Cassiopeiae 1995 AND Request to monitor dwarf nova 0103+59 HT Cassiopeiae AND Request to monitor 2138+43 SS Cygni [V723 Cas]

Alert Notice 317: Request to monitor 0103+59 HT Cas, 0809-76 Z Cha, 1004-69 OY Car AND Request to monitor 2147+13 LS Peg AND Request to monitor 1743-12 V378 Ser (Nova Ser 2005)

June 3, 2005

SUBJECTS:
1. REQUEST TO MONITOR 0103+59 HT CAS, 0809-76 Z CHA, 1004-69 OY CAR
2. REQUEST TO MONITOR 2147+13 LS PEG
3. REQUEST TO MONITOR 1743-12 V378 SER (NOVA SER 2005)

1. REQUEST TO MONITOR 0103+59 HT CAS, 0809-76 Z CHA, 1004-69 OY CAR

Tags

AAVSO Alert Notice

cataclysmic variable

AAVSO International Database

Read more about Alert Notice 317: Request to monitor 0103+59 HT Cas, 0809-76 Z Cha, 1004-69 OY Car AND Request to monitor 2147+13 LS Peg AND Request to monitor 1743-12 V378 Ser (Nova Ser 2005)

Alert Notice 326: Request to monitor 2035-01 AE Aqr for multiwavelength campaign AND Reminder to monitor HT Cas, Z Cha, and OY Car

August 24, 2005

SUBJECTS:

1. REQUEST TO MONITOR 2035-01 AE AQR FOR MULTIWAVELENGTH CAMPAIGN
2. REMINDER TO MONITOR HT CAS, Z CHA, AND OY CAR

1. REQUEST TO MONITOR 2035-01 AE AQR FOR MULTIWAVELENGTH CAMPAIGN

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AAVSO International Database

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Special Notice #221: Infrequent Outburst of the SU UMa Variable HT Cas

November 2, 2010: As reported by Tim Parson (Circle Pines, Minnesota, USA) and confirmed by Pavol Dubovsky (Kolonica, Slovakia), the infrequently-outbursting dwarf nova HT Cas is in outburst. Parson observed HT Cas in outburst at m(vis)=12.9 on JD 2455502.93 (2010 November 2.43), and the outburst was confirmed by Dubovsky at m(vis)=12.4 on JD 2455503.3 (2010 November 2.8). The last confirmed well-observed outburst of this star occurred on 2008 January 10. Observations of this variable are strongly encouraged at this time. Both visual and CCD observations are en

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