AAVSO NEWS FLASH No. 33
THE AMERICAN ASSOCIATION OF VARIABLE STAR OBSERVERS
25 Birch Street, Cambridge, MA 02138 USA
Tel. 617-354-0484 Fax 617-354-0665
INTERNET: aavso@aavso.org
* * * AAVSO NEWS FLASH * * *
Subject: SS Cyg, FG Sge, AB Dra, SU UMa No. 33
June 27, 1996
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SS CYGNI
The dwarf nova type (SS Cyg subclass prototype) cataclysmic variable is in
outburst as indicated by the following observations:
AAVSO Observer AAVSO Observer
UT Mag. Initials UT Mag. Initials
JUN 25.0001 12.1 PYG JUN 26.1986 9.5 SWT
JUN 25.073 12.2 SPK JUN 26.2042 8.6 RTY
JUN 25.2042 11.9 HSG JUN 26.2778 9.0 SCE
JUN 25.961 10.6 SPK JUN 26.2833 9.1 BTH
JUN 25.9792 10.0 BMM JUN 26.288 9.1 CCDV ZRE
JUN 25.988 10.1 GMC JUN 26.3299 9.0 HAB
JUN 26.0174 10.2 PYG JUN 26.3507 8.6 SQN
JUN 26.073 10.1 SPK JUN 26.60 9.3 DGP
JUN 26.0965 10.0 RTY JUN 27.0160 8.4 BMM
JUN 26.1201 9.4 RTY JUN 27.1271 8.4 HAV
JUN 26.1347 9.3 RTY JUN 27.1375 8.6 BRJ
JUN 26.1347 9.8 HAB JUN 27.1743 8.7 DIL
JUN 26.1514 9.1 RTY JUN 27.1910 8.5 BTB
JUN 26.1646 9.0 RTY JUN 27.2014 8.5 SWT
JUN 26.1736 9.6 BRJ JUN 27.2062 8.4 RTY
JUN 26.1806 9.7 BTB JUN 27.4160 8.2 SLZ
This star is scheduled to be observed with several satellites during its
next long outburst (see AAVSO Alert Notices 221 and 222). Analyzing the
AAVSO data going back to 1987, we have predicted the current outburst to be
a narrow one. Please monitor SS Cyg closely and send in your observations
daily (until the end of the outburst) so that we can confirm the duration
of the current outburst.
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FG SAGITTAE
FG Sge, the central star of a planetary nebula, appears to be recovering
slowly from its earlier dramatic fading (see News Flash No. 18, AAVSO Alert
Notice 221). The following observations show this brightening trend over
the past month:
AAVSO Observer AAVSO Observer
UT Mag. Initials UT Mag. Initials
MAY 26.200 16.10CCDV ZRE JUN 12.97 <15.0 VET
MAY 31.289 15.51CCDV ZRE JUN 15.261 15.37CCDV ZRE
JUN 3.4792 16.5 CCDV RR JUN 18.4063 15.0 CCDV RR
JUN 6.240 15.59CCDV ZRE JUN 26.1694 <14.5 BRJ
JUN 7.97 <15.0 VET JUN 26.250 14.74CCDV ZRE
JUN 9.1688 <14.5 HAV
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AB DRACONIS
The dwarf nova type (Z Cam subclass) cataclysmic variable is in outburst as
indicated by the following observations:
AAVSO Observer
UT Mag. Initials
JUN 26.278 13.8 CCDV ZRE
JUN 27.1368 13.0 BRJ
JUN 27.1882 12.9 SWT
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SU URSAE MAJORIS
The dwarf nova type (SU UMa subclass prototype) cataclysmic variable SU UMa
appears to be in outburst as indicated by the following observations:
AAVSO Observer
UT Mag. Initials
JUN 22.1792 <14.0 HSG
JUN 27.1132 12.3 BRJ
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We thank the following contributors for the data that they have provided
for this News Flash:
BMM - M. Biesmans, Belgium PYG - G. Poyner, England
BRJ - J. Bortle, USA RR - R. Royer, USA
BTB - T. Bretl, USA RTY - T. Rogers, USA
BTH - T. Burrows, USA SCE - C. Scovil, USA
GMC - M. Gill, England SLZ - G. Schott, Germany
DGP - G. Dyck, USA SPK - P. Schmeer, Germany
DIL - W. Dillon, USA SQN - L. Shaw, USA
HAB - R. Hays, USA SWT - R. Stewart, USA
HAV - R. Harvan, USA VET - M. Verdenet, France
HSG - G. Hanson, USA ZRE - R. Zissell, USA
Please monitor these and other stars closely and phone-in, fax, or e-mail
your observations to the AAVSO.
Good observing!
Janet A. Mattei
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Symbols may include: < = fainter than magnitude given (variable not seen)
: = uncertain
CCDV = Charge-coupled device with (V) filter
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observations of unusual variable star activity to:
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If you would like data from the AAVSO International Database for
research purposes, please send your request to:
Janet Mattei, AAVSO Director, at aavso@aavso.org
We look forward to including your observations in future editions
of AAVSO NEWS FLASH!
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