AAVSO NEWS FLASH No. 14
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: T CrB, V348 Sgr No. 14
April 25, 1996
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T CORONAE BOREALIS
The brightest recurrent nova, T CrB, has been reported to be showing
some activity as indicated by the following recent observations:
AAVSO Observer
UT JD Mag. Initials
APR 10.2035 2450183.7035 9.9 DIL
APR 16.872 2450190.372 9.9 DPA
APR 16.903 2450190.403 10.4 SPK
APR 17.960 2450191.46 10.4 SPK
APR 18.948 2450192.448 10.4 SPK
APR 19.962 2450193.462 10.2 SPK
APR 21.024 2450194.524 9.8 DPA
APR 21.1132 2450194.6132 10.0 SET
APR 21.2049 2450194.7049 10.1 DLA
APR 21.885 2450195.385 9.8 DPA
APR 22.140 2450195.64 9.9 SNE
APR 22.848 2450196.348 10.0 DPA
APR 23.4063 2450196.9063 10.0 DLA
APR 25.053 2450198.553 9.8 DPA
APR 25.1854 2450198.6854 9.9 DIL
APR 25.5278 2450199.0278 9.6 RR
This recurrent nova has an orbital period of 227.59 days (Warner, B.
1995, Cataclysmic Variable Stars, Cambridge University Press, Cambridge)
that can be seen in the light curve as small amplitude periodic modulations.
The recent activity may be due to this and deserves the attention of
our observers.
The last major outburst of this recurrent nova was in 1946 when it
reached magnitude 2.0.
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V348 SAGITTARII
Astronomers at the University of Colorado and also Louisiana State
University are scheduled to observe the interesting R CrB star, V348 Sgr
with the Hubble Space Telescope on April 28th at 22:00 UT. They hope to
observe this star at its maximum.
V348 Sgr faded from maximum between April 15th and April 20th and is now
slowly recovering, with oscillations, from this short duration fading as
indicated by the following observations:
AAVSO Observer
UT JD Mag. Initials
APR 15.4243 2450188.9243 12.0 HAV
APR 21.01 2450194.51 <13.2 OB
APR 22.01 2450195.51 <13.2 OB
APR 23.06 2450196.56 12.4 OB
APR 23.2175 2450196.7175 12.74 CCDV LIW
APR 23.2584 2450196.7584 12.52 CCDV LIW
APR 23.3035 2450196.8035 12.4 HAV
APR 23.4819 2450196.9819 12.4 RR
APR 25.2220 2450198.7220 12.82 CCDV LIW
APR 25.2585 2450198.7585 12.88 CCDV LIW
APR 25.3111 2450198.8111 12.4 HAV
APR 25.4889 2450198.9889 12.4 RR
Please keep a close eye on V348 Sgr and keep us informed of its
behavior. If it starts to fade again, from now until April 29,
let us know by phone/e-mail/fax immediately.
An "f" scale AAVSO Preliminary chart for V348 Sgr can be obtained
from our ftp site:
ftp://ftp.aavso.org/pub/charts/
or through the chart page on our web site:
http://www.aavso.org/netscaped/charts.html
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We thank our contributors listed below for the data they have provided for
this News Flash:
DIL - W. Dillon, USA OB - M. Overbeek, South Africa
DLA - A. Dill, USA SET - C. Stephan, USA
DPA - A. Diepvens, Belgium SNE - N. Simmons, USA
GRL - B. Granslo, Norway SPK - P. Schmeer, Germany
HAV - R. Harvan, USA RR - R. Royer, USA
LIW - W. Liller, Chile
Please monitor these and other variable stars closely and phone-in, fax,
or e-mail your observations to the AAVSO.
Good observing!
Janet A. Mattei
________________________________________________________________________________
AAVSO NEWS FLASH is a new electronic publication of the AAVSO intended
to provide observers with timely information on unusual variable star
activity. The basis of the data in this publication will be the
observations reported to AAVSO Headquarters.
The AAVSO NEWS FLASH will not replace the AAVSO Alert Notice. It will
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