AAVSO NEWS FLASH - No. 9
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: UV Per, GK Per No. 9
April 3, 1996
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UV PERSEI
As indicated by the following observations, UV Per recently returned to
minimum following its last superoutburst (see News Flash No. 5-7) and has
now started to brighten once again. This is an unprecedented behavior for
UV Per.
UT JD Mag. Observer
MAR 26.791 2450169.291 12.5 (L. T. Jensen, Denmark)
MAR 27.028 2450169.528 13.01 CCDV (R. Zissell, USA)
MAR 27.028 2450169.528 13.01 CCDV (Zissell)
MAR 27.1833 2450169.6833 13.5 (G. Hanson, USA)
MAR 28.020 2450170.52 13.73 CCDV (Zissell)
MAR 29.1597 2450171.6597 <13.6 (T. Burrows, USA)
MAR 30.033 2450172.533 16.25 CCDV (Zissell)
MAR 31.046 2450173.546 16.34 CCDV (Zissell)
APR 01.065 2450174.565 16.61 CCDV (Zissell)
APR 1.899 2450175.399 <12.8 (G. Poyner, England)
APR 3.035 2450176.535 13.91 CCDV (Zissell)
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GK PERSEI
The minor outburst of this old nova continues as indicated by the following
observations.
UT JD Mag. Observer
MAR 26.808 2450169.308 10.5 (L. T. Jensen, Denmark)
MAR 26.82 2450169.32 10.3 (G. Comello, Netherlands)
MAR 27.0167 2450169.5167 10.3 (J. McKenna, USA)
MAR 27.1722 2450169.6722 10.6 (G. Hanson, USA)
MAR 27.833 2450170.333 10.2 (K. Medway, England)
MAR 29.0333 2450171.5333 10.6 (S. O'Connor, Canada)
MAR 29.1701 2450171.6701 10.4 (T. Burrows, USA)
MAR 30.0306 2450172.5306 10.7 (M. A. Komorous, Canada)
MAR 30.1576 2450172.6576 10.4 (Burrows)
MAR 31.1083 2450173.6083 10.3 (W. Dillon, USA)
MAR 31.1625 2450173.6625 10.6: moon (Burrows)
APR 1.897 2450175.397 10.8 (G. Poyner, England)
APR 3.0507 2450176.5507 10.6 (O'Connor)
Dr. J. Osborne has been observing GK Per with the XTE satellite since
the start of the outburst. We have been transmitting your data to him
regularly. He wrote:
"This sequence of XTE observations will show the X-ray behaviour
of a magnetic CV {cataclysmic variable} under conditions of
changing mass transfer for the first time in a systematic way.
The AAVSO observations play a very significant role in this,
and {XTE} observations have been made at magnitudes of
approximately 12.2, 11.9, 10.8 and 10.4 so far."
The next and last XTE observation will be scheduled on the decline
of the outburst. Your observations are crucial in the scheduling
of the satellite and correlating the data.
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Please monitor these stars closely and phone-in, fax, or e-mail your
observations to the AAVSO. When reporting observations please indicate
the source of the finder chart and the comparison stars used.
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
be more frequent and shorter.
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If you would like data from the AAVSO International Database for
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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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