dwarf novae

Alert Notice 796: Monitoring requested for 12 dwarf novae in support of HST observations in 2022-2023

The target table below is being updated as each target is completed or rescheduled. - Elizabeth O. Waagen

Notes: LL Lyr was not able to be observed due to issues with HST. It has been rescheduled for the 2023-2024 year of this campaign. - Elizabeth O. Waagen, October 24, 2023

Please observe LL Lyr nightly in anticipation of upcoming HST observations in September. An Alert Notice will be issued when it has been scheduled. - Elizabeth O. Waagen, September 5, 2023

Tags

AAVSO Alert Notice

dwarf novae

cataclysmic variable

HST

AAVSO International Database

SDSS J080449.49+161624.8

SSS 100511:061754-362655

SDSS J161909.10+135145.5

Read more about Alert Notice 796: Monitoring requested for 12 dwarf novae in support of HST observations in 2022-2023

Alert Notice 758: Monitoring requested for 11 dwarf novae in support of HST observations in 2021-2022

Note: RY Ser was scheduled for May and for June but was in outburst or too close to outburst to be a safe target. It may be rescheduled. GP Com observations did take place. - Elizabeth O. Waagen, July 5, 2022

GP Com observations will take place April 29-30, 2022; coverage is needed until May 20. See Alert Notice 775. - Elizabeth O. Waagen, April 27, 2022

Tags

SDSS J154453.60+255348.8

SDSS J190817.07+394036.4

cataclysmic variables

dwarf novae

HST

AAVSO International Database

AAVSO Spectroscopy Database (AVSpec)

Read more about Alert Notice 758: Monitoring requested for 11 dwarf novae in support of HST observations in 2021-2022

Alert Notice (un-numbered November 23, 1981): Special AAVSO Alert Notice on Dwarf Novae

November 23, 1981

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

SPECIAL AAVSO ALERT NOTICE ON DWARF NOVAE

Do continue your close monitoring of dwarf novae. Dr. Stiening from Stanford University and his colleagues will be observing these stars from Nov. 25th to Dec. 4th at Mt. Lemon, Arizona, and they have requested our help once again.

Tags

AAVSO International Database

AAVSO Alert Notice

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Alert Notice (un-numbered April 29, 1980): Special Alert Notice II [dwarf novae]

April 29, 1980

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

SPECIAL ALERT NOTICE - II

Tags

AAVSO International Database

AAVSO Alert Notice

Read more about Alert Notice (un-numbered April 29, 1980): Special Alert Notice II [dwarf novae]

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

Tags

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

Special Notice #391: Targets Remaining in Northern Dwarf Novae Campaign

December 2, 2014: AAVSO Alert Notice 505 (http://www.aavso.org/aavso-alert-notice-505) announced the campaign on several northern dwarf novae by Deanne Coppejans and colleagues. This campaign, searching for radio jets in dwarf novae, has been moving very quickly! Thanks to your observations and timely notifications, three of the five sets of VLA observations available for the targets have been used on Z Cam, RX And, and YZ Cnc. The PI is extremely appreciative and thanks you all for your excellent work.

Tags

AAVSO International Database

Read more about Special Notice #391: Targets Remaining in Northern Dwarf Novae Campaign

Alert Notice 148: Nova Scuti 1991 AND Request to monitor dwarf novae for IUE observing runs

THE AMERICAN ASSOCIATION OF VARIABLE STAR OBSERVERS
25 Birch Street, Cambridge, NIA 02138 USA
BITNET: aavso@cfa8 SPAN: nssdca::cfa8::aavso
Tel. 617-354-0484 FAX 617-354-0665

AAVSO ALERT NOTICE 148 (September 3,1991)

NOVA SCUTI 1991

Tags

AAVSO International Database

Read more about Alert Notice 148: Nova Scuti 1991 AND Request to monitor dwarf novae for IUE observing runs

Alert Notice 145: Request to monitor dwarf novae for IUE observing runs AND Request to monitor high-galactic latitude cataclysmic variables for IUE observing run

THE AMERICAN ASSOCIATION OF VARIABLE STAR OBSERVERS
25 Birch Street, Cambridge, MA 02138 USA
BITNET: aavso@cfaS SPAN: nssdca::cfa8::aavso
Tel. 617-354-0484 FAX 617-354-0665

AAVSO ALERT NOTICE 145 (June 3, 1991)

REQUEST TO MONITOR DWARF NOVAE FOR IUE OBSERVING RUNS

Tags

IUE

dwarf novae

cataclysmic variables

AAVSO International Database

AAVSO Alert Notice

Read more about Alert Notice 145: Request to monitor dwarf novae for IUE observing runs AND Request to monitor high-galactic latitude cataclysmic variables for IUE observing run

AAVSO observers help solve a mystery about an important variable star

A group of astronomers led by Dr. James Miller-Jones of Curtin University and the International Centre for Radio Astronomy Research have published a revised distance to the famed variable star SS Cygni, solving a major mystery surrounding this star and its behavior. Their work was made possible due to the dedication of dozens of observers worldwide who monitor SS Cygni and report their observations to the American Association of Variable Star Observers (AAVSO).

Tags

cataclysmic variables

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Special Notice #334: Outburst of the possible old nova GR Ori

February 11, 2013: Observer Rod Stubbings (Tetoora Road, Vic., Australia) reports an outburst of the suspected old nova GR Ori (== Nova Ori 1916), observing the star at a visual magnitude of 13.0 on 2013 February 11.476 UT (JD 2456334.976). This observation was confirmed by observer Stephen Hovell (Kaitaia, New Zealand), who also reported the star at 13.0 on February 11.461.

Tags