Skip to main content
Search this site:
About Us
The Organization
Vision/Mission
What We Do
Services
Work & Research
Volunteer
History
The AAVSO Archives
By-Laws
Contact Us
The People
Council Members, Officers & Section Leaders
Staff
Honors & Awards
In Memoriam
Outreach
Presentation Library
Writers Bureau
Speakers Bureau
The Location
AAVSO Headquarters
Directions
Guest Suite
Our Publications
Annual Report
The Journal of the AAVSO
Alert and Special Notices
AAVSO Newsletter
Visual Observing Manual
CCD Observing Manual
Solar Bulletin
plus many more...
Apply for Membership
Renew Membership
Support the AAVSO
Funds
Amazon.com
Benefactors
AAVSO Store
Citizen Sky Project
Community
Meetings
Forums
Live Chat Room
Staff Blog
Social Media
Variable Stars
What Are They & Why Observe Them?
The Stories Variables Tell
Types of Variables
Variable Star of the Season
Education Materials
CHOICE Online Institute
Science Olympiad
Two Eyes, 3D
Variable Star Astronomy
H-R Diagram Plotting Activity
Reporting Variable Star Discoveries
Variable Star Index (VSX)
AAVSO in Print - Publications Using AAVSO Data
Observing
Observing at a Glance
Observing Sections
Observing Manuals
Visual Observing Manual
CCD Photometry Manual
DSLR Photometry Manual
Alert and Special Notices
Observing Campaigns
WebObs (Search AID or Submit Your Data)
Variable Star Charts
Variable Star Plotter (VSP)
Report Chart Errors
Request Comparison Stars
Observation Planner Tool
JD Calculator & Calendar
Software Directory
Data
AAVSO International Database (AID)
Portal for Researchers
Historic Light Curves
WebObs (Submit/Search Data)
Data Access
Download Data in Ascii Form
Light Curve Generator (LCG)
MyNewsFlash - Real-Time Data Delivery
WebObs Search (Searches AID)
Data Analysis
VPHOT - Online Photometry Tool
Zapper - Help Validate Data
VStar - Java Visualization & Analysis Tool
The AAVSO Photometric All-Sky Survey (APASS)
AAVSOnet
Getting Started
What Are Variable Stars?
Things to Do
Find a Mentor
Online Forum for Help and Advice
Star Tutorials
10-Star Tutorial (Visual Observations of Variable Stars)
5-Star Tutorial (Data Analysis)
Home
Contact Us
FAQ
Donate
Amazon
Home
Print This Page
cataclysmic variable
Title
Posted By
Updated/commented date
Type
Special Notice #339: V406 Vir (SDSS J123813.73-033932.9) HST/COS observations early tomorrow
weo
11 weeks 5 days
ago
Page
Alert Notice 466: Monitoring of V380 Oph requested in support of HST observations
weo
38 weeks 6 days
ago
Page
Special Notice #323: Observations of BB Dor requested
weo
18 weeks 22 hours
ago
Page
Special Notice #315: HST COS observing SDSS J075507.70+143547.6 December 13-14 and HS 0218+3229 is next target
weo
22 weeks 3 days
ago
Page
AAVSO Alert Notice 433
weo
2 years 9 weeks
ago
Page
Special Notice #303: VLBA and e-MERLIN observations of SS Cyg underway
weo
28 weeks 6 days
ago
Page
AAVSO Special Notice #224
weo
2 years 25 weeks
ago
Page
Special Notice #298: Second set of HST COS CV targets announced
weo
32 weeks 3 days
ago
Page
Alert Notice #480: MR UMa superoutburst coverage requested for HST observations
weo
10 weeks 4 days
ago
Page
Alert Notice 468: Observing campaign on V380 Oph cancelled
weo
38 weeks 6 days
ago
Page
Special Notice #330: Next HST/COS targets are IR Com and BB Dor
weo
15 weeks 3 days
ago
Page
Special Notice #319: HST COS observing SDSS J093249.57+472523.0 2013 January 11-12
weo
19 weeks 4 days
ago
Page
Special Notice 255: Cataclysmic Variable in Draco = PNV J18422792+4837425
weo
1 year 35 weeks
ago
Page
Special Notice #310: Continued observing of V452 Cas requested
weo
26 weeks 5 days
ago
Page
AAVSO Special Notice #227
weo
2 years 19 weeks
ago
Page
Special Notice #299: Observations needed TODAY of SDSS J164248.52+134751.4
weo
31 weeks 6 days
ago
Page
Special Notice #345: MR UMa observations needed now and RZ Leo next HST/COS target
weo
6 weeks 1 day
ago
Page
AAVSO Alert Notice 424
weo
2 years 35 weeks
ago
Page
Alert Notice 469: Observations of TT Ari requested in support of MOST observations
weo
38 weeks 2 days
ago
Page
Special Notice #332: Observations of IR Com crucial now through February 8
weo
14 weeks 6 days
ago
Page
Special Notice #279: Request for monitoring of SS Cygni in support of European VLBI radio observations
weo
26 weeks 5 days
ago
Page
Special Notice #321: Observations critical tonight for SDSS J093249.57+472523.0
weo
18 weeks 5 days
ago
Page
Special Notice #311: HST COS to observe CW Mon 2012 November 30 - December 1
weo
26 weeks 6 hours
ago
Page
AAVSO Alert Notice 431
weo
2 years 12 weeks
ago
Page
Special Notice #302: HST COS observations of 1RXS J023238.8-371812 scheduled
weo
29 weeks 6 days
ago
Page
Special Notice #348: QZ Lib observations critical now for HST/COS and SDSS J154453.60+255348.8 next target
weo
4 weeks 1 day
ago
Page
AAVSO Bulletin 73 for 2010 06 hr
weo
2 years 33 weeks
ago
Page
Special Notice #297: HST COS observations of SDSS J164248.52+134751.4 scheduled
weo
32 weeks 3 days
ago
Page
Long-term monitoring of the recurrent nova U Scorpii
Matthew Templeton
3 years 2 weeks
ago
Page
AAVSO Alert Notice 434
Matthew Templeton
2 years 7 weeks
ago
Page
Variable Stars and the Stories they Tell
Matthew Templeton
37 weeks 10 hours
ago
Page
AAVSO Alert Notice 436
Matthew Templeton
1 year 46 weeks
ago
Page
V1280 Sco (Nova Scorpii 2007)
LKR
1 year 16 weeks
ago
Page
KT Eri (Nova Eridanus 2009)
LKR
1 year 16 weeks
ago
Page
V382 Vel (Nova Velorum 1999)
LKR
1 year 16 weeks
ago
Page
Special Notice #245: Outburst of SV Ari
HQA
1 year 41 weeks
ago
Page
Variable Star of the Season Archive
BSJ
1 year 6 weeks
ago
Page
About Us
The Organization
Vision/Mission
What We Do
Services
Work & Research
Volunteer
History
The AAVSO Archives
By-Laws
Contact Us
The People
Council Members, Officers & Section Leaders
Staff
Honors & Awards
In Memoriam
Outreach
Presentation Library
Writers Bureau
Speakers Bureau
The Location
AAVSO Headquarters
Directions
Guest Suite
Our Publications
Annual Report
The Journal of the AAVSO
Alert and Special Notices
AAVSO Newsletter
Visual Observing Manual
CCD Observing Manual
Solar Bulletin
plus many more...
Apply for Membership
Renew Membership
Support the AAVSO
Funds
Amazon.com
Benefactors
AAVSO Store
Citizen Sky Project
Community
Meetings
Forums
Live Chat Room
Staff Blog
Social Media
Variable Stars
What Are They & Why Observe Them?
The Stories Variables Tell
Types of Variables
Variable Star of the Season
Education Materials
CHOICE Online Institute
Science Olympiad
Two Eyes, 3D
Variable Star Astronomy
H-R Diagram Plotting Activity
Reporting Variable Star Discoveries
Variable Star Index (VSX)
AAVSO in Print - Publications Using AAVSO Data
Observing
Observing at a Glance
Observing Sections
Observing Manuals
Visual Observing Manual
CCD Photometry Manual
DSLR Photometry Manual
Alert and Special Notices
Observing Campaigns
WebObs (Search AID or Submit Your Data)
Variable Star Charts
Variable Star Plotter (VSP)
Report Chart Errors
Request Comparison Stars
Observation Planner Tool
JD Calculator & Calendar
Software Directory
Data
AAVSO International Database (AID)
Portal for Researchers
Historic Light Curves
WebObs (Submit/Search Data)
Data Access
Download Data in Ascii Form
Light Curve Generator (LCG)
MyNewsFlash - Real-Time Data Delivery
WebObs Search (Searches AID)
Data Analysis
VPHOT - Online Photometry Tool
Zapper - Help Validate Data
VStar - Java Visualization & Analysis Tool
The AAVSO Photometric All-Sky Survey (APASS)
AAVSOnet
Getting Started
What Are Variable Stars?
Things to Do
Find a Mentor
Online Forum for Help and Advice
Star Tutorials
10-Star Tutorial (Visual Observations of Variable Stars)
5-Star Tutorial (Data Analysis)
AAVSO
49 Bay State Rd. Cambridge, MA 02138
aavso@aavso.org
617-354-0484