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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
ZTF18acxhphf
ZTF J2252-0519
V479 And
CH UMa
ASASSN-18dg
SDSS J080449.49+161624.8
SSS 100511:061754-362655
SDSS J161909.10+135145.5
HP Lib
V1082 Sgr
V584 Lyr
LL Lyr

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
AAVSO Alert Notice
ASASSN-14cn
CH UMa
GP Com
RY Ser
SDSS J154453.60+255348.8
SDSS J190817.07+394036.4
UU Aql
V1239 Her
V485 Aqr
V493 Gem
YZ LMi
cataclysmic variables
dwarf novae
HST
AAVSO International Database
AAVSO Spectroscopy Database (AVSpec)

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
YZ Cnc
U Gem
SY Cnc
SS Cyg
RU Peg
KT Per
HL CMa
EM Cyg
dwarf novae
CN Ori
AAVSO International Database
AAVSO Alert Notice

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
YZ Cnc
X Leo
UZ Ser
UU Aql
TW Vir
TT Boo
t leo
SY Cnc
SU UMa
SS Cyg
RU Peg
EX Hya
dwarf novae
CY Lyr
AY Lyr
AL Com
AH Her
AAVSO International Database
AAVSO Alert Notice

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
YZ Cnc
X Leo
U Gem
TZ Per
TW Vir
TT Boo
t leo
SY Cnc
SU UMa
SS Aur
HT Cas
FO Per
EX Hya
dwarf novae
AM Her
AL Com
AH Her
AF Cam
AAVSO International Database
AAVSO Alert Notice

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
VLA
U Gem
SU UMa
front page news
dwarf novae
AAVSO Special Notice
AAVSO International Database

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
V444 Sct
AAVSO Alert Notice
dwarf novae
IUE
Nova Sct 1991
AAVSO International Database

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

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
radio astronomy
press release
Observing campaigns
front page news
dwarf novae
cataclysmic variables

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
WZ Sge star
time series
special notice
recurrent novae
novae
nova
front page news
dwarf novae
AAVSO Special Notice
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