THE AMERICAN ASSOCIATION OF VARIABLE STAR OBSERVERS
25 Birch Street, Cambridge, MA 02138 USA
Tel. 617-354-0484 Fax 617-354-0665
http://www.aavso.org
* * * AAVSO NEWS FLASH * * *
Subject: 1135+12B SN 2000ew 0524-03 V1159 ORI No. 704
0309-22 EF ERI 0641+28 IR GEM November 30, 2000
0109+37 FO AND 0845+03 CT HYA
0130+31 TW TRI 1307-60 NN CEN
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1135+12B SUPERNOVA 2000ew IN NGC 3810 IN LEO
We have been informed by the Central Bureau for Astronomical Telegrams
(IAU Circular 7530) that T. Puckett and A. Langoussis, Mountain Town,
GA, have discovered a supernova on November 28.48 UT at unfiltered CCD
magnitude 14.9 on an image taken with the Puckett Observatory 0.30-m
automated supernova patrol telescope.
The supernova was also present on unfiltered CCD frames taken by
G. J. Garradd, Biosphere 2 Observatory, on Nov. 29.39 UT with a 0.6-m
reflector.
Nothing appears at the location of the supernova on unfiltered CCD
images taken by Puckett February 8 - May 8, nor does anything appear
down to magnitude ~21.0 on on Palomar Sky Survey images from April 4,
1989, and April 17, 1991.
Spectroscopy by M. Dennefeld and J. Patris, Institut d'Astrophysique,
Paris, on Nov. 30.35 UT shows that SN 2000ew is a type Ia supernova
about two weeks past maximum (IAU Circular 7532).
SN 2000ew is located at
R.A. = 11h 40m 58.52s Decl. = +11 degrees 27' 55.9" (2000.0)
which is 1.9" west and 20.7" south of the center of NGC 3810 (IAU
Circular 7530) .
NGC 3810 was also the site of 1135+12 SN 1997dq (IAU Circular 6770).
An AAVSO preliminary chart for 1135+12B SN 2000ew has been posted on
the AAVSO web site at the following address:
http://charts.aavso.org/PRELIM/LEO/NGC_3810/
Congratulations to Tim Puckett and A. Langoussis on their discovery!
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UPDATED FINDER CHART FOR 0309-22 EF ERI
The finder chart for the magnetic cataclysmic variable EF Eri
mentioned in yesterday's News Flash (No. 703) has been updated with
comparison star magnitudes replacing the letter sequence. This
finder chart can be found on the AAVSO web page at the following
address:
http://www.aavso.org/newsflash/cvcharts.stm
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0109+37 FO ANDROMEDAE
The dwarf nova type (SU UMA subclass) cataclysmic variable FO AND appears
to be in outburst, as indicated by the following observations:
AAVSO Observer AAVSO Observer
UT Mag. Initials UT Mag. Initials
NOV 26.846 <15.7 PYG NOV 29.8611 <14.7 DPV
NOV 27.874 <15.2 RMQ NOV 29.908 15.1 PYG
NOV 28.8986 <14.0 DPV
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0130+31 TW TRIANGULI
The dwarf nova type (Z CAM subclass) cataclysmic variable TW TRI appears to
be in outburst, as indicated by the following observations:
AAVSO Observer AAVSO Observer
UT Mag. Initials UT Mag. Initials
NOV 25.8392 15.84 DRG NOV 29.983 13.7 MUY
NOV 26.765 <13.9 MUY
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0524-03 V1159 ORIONIS
The dwarf nova type (SU UMA subclass) cataclysmic variable V1159 ORI is in
outburst, as indicated by the following observations:
AAVSO Observer AAVSO Observer
UT Mag. Initials UT Mag. Initials
NOV 27.069 14.8 PYG NOV 29.758 13.9 PEX
NOV 27.486 <14.6 SRX NOV 29.9167 13.4 DPV
NOV 27.508 15.0: NLX NOV 30.014 13.6 MUY
NOV 27.871 <13.6 RMQ NOV 30.051 13.3 PYG
NOV 29.690 13.8 SRX
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0641+28 IR GEMINORUM
The dwarf nova type (SU UMA subclass) cataclysmic variable IR GEM is in
outburst, as indicated by the following observations:
AAVSO Observer AAVSO Observer
UT Mag. Initials UT Mag. Initials
NOV 27.072 <15.2 PYG NOV 29.701 13.6 SRX
NOV 27.219 <13.6 MUY NOV 29.9028 12.5 DPV
NOV 28.897 <13.6 MUY NOV 30.026 12.0 MUY
NOV 28.9931 <14.2 DPV NOV 30.032 12.1 PYG
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0845+03 CT HYDRAE
The dwarf nova type (SS CYG subclass) cataclysmic variable CT HYA is in
outburst, as indicated by the following observations:
AAVSO Observer AAVSO Observer
UT Mag. Initials UT Mag. Initials
NOV 25.797 <15.0 PEX NOV 29.721 14.5 SRX
NOV 27.713 <14.6 SRX NOV 29.794 14.4 PEX
NOV 29.700 14.5 SRX NOV 29.825 14.4 PEX
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1307-60 NN CENTAURI
The dwarf nova type (SS CYG subclass) cataclysmic variable NN CEN is in
outburst, as indicated by the following observations:
AAVSO Observer AAVSO Observer
UT Mag. Initials UT Mag. Initials
NOV 24.825 <15.3 PEX NOV 27.709 <13.7 SRX
NOV 25.710 <14.0 SRX NOV 29.710 13.7 SRX
NOV 25.804 <14.5 PEX NOV 29.817 13.6 PEX
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We thank the following contributors for the data that they
have provided for this News Flash:
DPV - P. DUBOVSKY, SLOVAKIA PEX - A. PEARCE, AUSTRALIA
DRG - R. DIETHELM, SWITZERLAND PYG - G. POYNER, ENGLAND
MUY - E. MUYLLAERT, BELGIUM RMQ - M. RESZELSKI, POLAND
NLX - P. NELSON, AUSTRALIA SRX - R. STUBBINGS, AUSTRALIA
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, Director
Rebecca Pellock, Technical Assistant
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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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An archive of past issues of the News Flash is available
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http://www.aavso.org/newsflash/
We look forward to including your observations in future editions
of AAVSO NEWS FLASH!
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