AAVSO NEWS FLASH No. 25
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: ER UMa, HS1804+675, No. 25
V503 Cyg, SU UMa May 23, 1996
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ER URSAE MAJORIS
The very interesting dwarf nova type (SU UMa subclass) cataclysmic variable
ER UMa appears to be in superoutburst as indicated by the following
observations:
AAVSO Observer AAVSO Observer
UT Mag. Initials UT Mag. Initials
MAY 19.2153 <14.0 BTH MAY 21.89 12.6 FRF
MAY 20.2167 <14.0 BTH MAY 21.941 12.8 SQN
MAY 21.2181 12.8 BTH MAY 23.0465 12.4 BRJ
MAY 21.89 12.6 SNO MAY 23.2104 12.0 BTH
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HS1804+675
The cataclysmic variable HS1804+675 is in outburst as indicated by the
following observations:
AAVSO Observer
UT Mag. Initials
MAY 21.2833 <13.3 BTH
MAY 23.0604 13.1 BRJ
MAY 23.2347 12.9 BTH
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V503 CYGNI
The dwarf nova type cataclysmic variable V503 Cyg appears to be declining
from an outburst as indicated by the following observations:
AAVSO Observer
UT Mag. Initials
MAY 20.2931 13.5 GRI
MAY 21.94 13.6 SNO
MAY 21.962 14.2 SQN
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SU URSAE MAJORIS
The dwarf nova type (SU UMa subclass prototype) cataclysmic variable
SU UMa is now declining from a recent outburst as indicated by the following
observations:
AAVSO Observer AAVSO Observer
UT Mag. Initials UT Mag. Initials
MAY 16.2271 <14.1 HSG MAY 21.939 12.0 SQN
MAY 20.929 13.5 SPK MAY 21.951 12.2 SPK
MAY 21.89 12.6 SNO MAY 23.0451 12.9 BRJ
MAY 21.89 12.1 FRF MAY 23.2347 13.0 HSG
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We thank the following contributors for the data that they have provided
for this News Flash:
BRJ - J. Bortle, USA HSG - G. Hanson, USA
BTH - T. Burrows, USA SNO - L. Szentasko, Hungary
FRF - R. Fidrich, Hungary SPK - P. Schmeer, Germany
GRI - J. Griese, USA SQN - L. Shaw, USA
Please monitor these stars closely and phone-in, fax, or e-mail your
observations to the AAVSO.
Good observing!
Rebecca Pellock, Technical Assistant
in the absence of
Janet A. Mattei, Director
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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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If you would like data from the AAVSO International Database for
research purposes, please send your request to:
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We look forward to including your observations in future editions
of AAVSO NEWS FLASH!
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