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[vsnet-obs 1693] CVC 74 (IP Peg, FS Aur a/o)
- Date: Sat, 16 Dec 1995 19:46:36 -0100
- To: observations@aavso.org, j.bortle@genie.geis.com, guy@tahq.demon.co.uk, tkato@kusastro.kyoto-u.ac.jp, gp@star.sr.bham.ac.uk, lasse.teist@thranethrane.dk400.dk, pvancaut@innet.be, bill.worraker@aea.orgn.uk, nogami@kusastro.kyoto-u.ac.jp, safnet@mesiob.obspm.fr, KFA02524@niftyserve.or.jp, sno@iris.elte.hu, vsnet-obs@kusastro.kyoto-u.ac.jp, NAH01147@niftyserve.or.jp, ebroens@innet.be, fidusz@alba.zpok.hu
- From: Tonny Vanmunster <tvanmuns@innet.be>
- Subject: [vsnet-obs 1693] CVC 74 (IP Peg, FS Aur a/o)
- Sender: owner-vsnet-obs@kusastro.kyoto-u.ac.jp
BELGIAN ASTRONOMICAL SOCIETY V.V.S. - Working Group Variable Stars
Cataclysmic Variables Circular No.74 1995, December 16
Ed.: T. Vanmunster, Walhostraat 1A, 3401 Landen, BELGIUM
Internet: tvanmuns@innet.be TEL. 32-11-831504
--------------------------------------------------------------
The CATACLYSMIC VARIABLES Home Page: hht://www.cv.psi.edu
===================================================================
IP Peg [UG, 12.0B - 16.6B]
==========================
This object has been detected in outburst by several observers. We
received independent reports from L. Szentasko (Hungary), T. Vanmunster
(Belgium) and J. Pietz (Germany). Additional confirmative observations
were communicated by E. Broens (Belgium) and A. Diepvens (Belgium) :
1995 12 08.776 UT, [13.8 (G. Poyner, 0.40-m refl., seq: TA);
12 10.747 UT, [13.8 (G. Poyner);
12 13.818 UT, [13.9 (E. Broens, 0.35-m refl., seq: VSOLJ);
12 15.701 UT 12.8 (L. Szentasko, 0.33-m refl.);
12 15.717 UT, 12.5 (T. Vanmunster, 0.35-m refl., seq: TA);
12 15.735 UT, 12.6 (E. Broens);
12 15.739 UT, 12.3 (A. Diepvens, 0.15-m refr., seq: AAVSO);
12 15.770 UT, 12.5 (J. Pietz, 0.40-m refl.);
IP Peg was last seen in outburst on September 6, 1995 by J. Pietz
(CVC 56), when it became as bright as mag. 12.0.
Bill Worraker, Didcot, UK is heading an international observing project
on IP Peg (a TA/BAAVSS initiative), to study the eclipse behaviour of this
dwarf nova. Observers are strongly encouraged to send their eclipse timings
(with full details on sequence and comparison stars) to Bill Worraker
(bill.worraker@aea.orgn.uk).
FS Aur [UGZ:, 14.4v - 16.2v]
============================
Eric Broens, Mol, Belgium reports his outburst detection of this CVAP
object. Confirmation came from Tonny Vanmunster, Landen, Belgium. We
have following observations available :
1995 12 10.465 UT, 15.9 (M. Iida, 20-cm refl.+CCD, unfiltered);
12 10.469 UT, 15.4 (M. Iida);
12 10.805 UT, [14.7 (G. Poyner, 0.40-m refl.);
12 14.487 UT, 15.8 (M. Iida);
12 15.917 UT, 14.8 (E. Broens, 0.35-m refl., seq: VSOLJ);
12 16.090 UT, 14.4 (T. Vanmunster, 0.35-m refl., seq: VSOLJ);
According to our records, the object was last seen in outburst (i.e.
brighter than mag 15) on 1995 January 26, when it reached mag. 14.9
(CVC 27).
KV And [UGSU, 14.6p - 22.5p]
============================
In response to CVC 73, which announced the KV And outburst, Lasse Jensen,
Farum, Denmark remarks : "The AAVSO chart (11/94) for KV And marks the star
at a wrong position, although a note on the chart says that the position
is improved compared to Downes & Shara. Checking it with Downes & Shara,
it seems that the position is identical. The GSC-based chart made by Paul
Van Cauteren (Belgian Astronomical Society VVS) has KV And at the correct
position (at least where I observed the variable)."
Available observations of the present outburst :
-----------------------------------------------------------------------
DATE (UT) MAGN MS SEQ OBSERVER REMARKS SOURCE
-----------------------------------------------------------------------
1995 11 23.03 [15.0 mv GSC Bortle, J. CVC 73
1995 11 24.912 14.0 mv GSC Vanmunster, T. CVC 73
1995 11 24.938 13.6 mv Jensen, L. VSNET
1995 11 25.095 14.0 mv GSC Bortle, J. CVC 73
1995 11 25.709 13.9 mv Pietz, J. VSNET
1995 11 25.772 13.9 mv GSC Vanmunster, T. VSNET
1995 11 26.74 14.2: mv Szentasko, L. VSNET
1995 11 26.789 13.9 mv GSC Poyner, G. VSNET
1995 11 27.958 14.1: mv GSC Poyner, G. VSNET
1995 11 28.085 14.2 mv GSC Vanmunster, T. VSNET
1995 11 28.798 14.1 mv GSC Vanmunster, T. VSNET
1995 11 28.832 14.0 mv GSC Broens, E. VSNET
1995 12 01.081 14.3 mv Jensen, L. VSNET
1995 12 08.981 [14.1 mv GSC Poyner, G. VSNET
1995 12 10.797 [14.5 mv GSC Poyner, G. VSNET
DM Lyr [UG, 13.6p - 18p]
========================
Several additional observations of the DM Lyr were received. The complete
photometric summary now looks as follows :
-----------------------------------------------------------------------
DATE (UT) MAGN MS SEQ OBSERVER REMARKS SOURCE
-----------------------------------------------------------------------
1995 11 19.795 [14.8 mv TA Poyner, G. VSNET
1995 11 20.748 14.2 mv Pietz, J. CVC72
1995 11 21.682 14.1 mv Szentasko, L. CVC72
1995 11 21.702 14.5 mv Jensen, L. CVC72
1995 11 21.725 14.2 mv *Pietz, J. VSNET
1995 11 22.400 [14.4 mv Takahashi, S. CVC72
1995 11 22.71 14.3 mv Szentasko, L. VSNET
1995 11 22.764 14.6 mv TA Poyner, G. VSNET
1995 11 22.771 14.8 mv TA Worraker, B. priv(WOR)
1995 11 22.788 14.7 mv TA *Day, J. VSNET
1995 11 25.722 13.9 mv *Pietz, J. VSNET
1995 11 25.737 14.5 mv TA *Vanmunster, T. VSNET
1995 11 26.7 13.9 mv *Szentasko, L. VSNET
1995 11 26.794 14.7 mv TA *Poyner, G. VSNET
1995 11 28.760 [14.8: mv TA *Broens, E. VSNET
1995 11 28.786 15.2 mv TA *Vanmunster, T. VSNET
V493 Lyr [UG, 13.2 - 18.0p]
===========================
As noted by Tonny Vanmunster, Belgium in a VSNET message on November 27,
1995, this variable showed brightness variations of nearly 0.5 magnitudes
in narrow time intervals, during its present outburst. The event has been
recorded several times. We refer to the Cataclysmic Variables Home Page
for a light curve showing the observed phenomenon.
It would of course be extremely interesting to monitor V493 Lyr in very close
detail (several observations a night by different observers) during a next
(super)outburst, in order to determine if the observed behaviour is true.
The photometric summary below lists all observations covering the present
outburst of V493 Lyr. The corresponding light curve, and the one of the
August 1994 outburst, are shown in the Cataclysmic Variables Home Page.
-----------------------------------------------------------------------
DATE (UT) MAGN MS SEQ OBSERVER REMARKS SOURCE
-----------------------------------------------------------------------
1995 11 18.757 [14.1 mv Day, J. VSNET
1995 11 19.760 [14.1 mv *Jensen, L. priv(JEN)
1995 11 20.718 14.1 mv Jensen, L. VSNET
1995 11 20.756 14.1 mv Pietz, J. CVC72
1995 11 21.681 13.9 mv Szentasko, L. CVC72
1995 11 21.701 14.0 mv Jensen, L. CVC72
1995 11 21.718 14.3 mv *Pietz, J. VSNET
1995 11 21.731 14.3 mv *Pietz, J. VSNET
1995 11 21.781 13.8 mv *Pietz, J. VSNET
1995 11 21.937 13.5 mv TA Worraker, B. CVC72
1995 11 22.7 14.0 mv Szentasko, L. VSNET
1995 11 22.765 13.7 mv Poyner, G. VSNET
1995 11 22.768 14.3 mv TA Worraker, B. priv(WOR)
1995 11 22.795 13.6 mv *Day, J. VSNET
1995 11 24.891 14.3: mv TA Vanmunster, T. VSNET
1995 11 25.704 14.4 mv *Pietz, J. VSNET
1995 11 25.736 14.0 mv TA *Vanmunster, T. VSNET
1995 11 25.737 14.1 mv *Pietz, J. VSNET
1995 11 25.811 14.0 mv TA *Vanmunster, T. VSNET
1995 11 26.70 14.4 mv *Szentasko, L. VSNET
1995 11 26.792 14.4 mv *Poyner, G. VSNET
1995 11 28.756 14.4 mv TA *Broens, E. VSNET
1995 11 28.769 14.3 mv TA *Broens, E. VSNET
1995 11 28.771 14.7 mv TA *Vanmunster, T. VSNET
1995 11 28.778 14.8 mv TA *Vanmunster, T. VSNET
1995 11 28.785 14.8 mv TA *Vanmunster, T. VSNET
1995 11 28.793 14.9 mv TA *Vanmunster, T. VSNET
1995 11 28.801 14.7 mv TA *Vanmunster, T. VSNET
1995 11 28.808 14.8 mv TA *Vanmunster, T. VSNET
1995 11 28.814 14.8 mv TA *Vanmunster, T. VSNET
1995 11 28.827 14.4: mv TA *Broens, E. VSNET
1995 11 30.725 [14.1 mv *Jensen, L. VSNET
1995 12 01.702 [14.1 mv *Jensen, L. VSNET
HT Cas [UGSU, 10.8v - 18.4v]
============================
The famous November 1995 outburst of HT Cas now is definitely over.
We present a final photometric summary below, covering observations
till the end of November. A light curve, showing the full outburst
of HT Cas, is presented in the Cataclysmic Variables Home Page.
-----------------------------------------------------------------------
DATE (UT) MAGN MS SEQ OBSERVER REMARKS SOURCE
-----------------------------------------------------------------------
1995 11 23.929 16.4 CU Rodriguez, D. 26-cm+CCD VSNET
1995 11 23.945 16.4 CU Rodriguez, D. 26-cm+CCD VSNET
1995 11 23.929 16.5 CU Rodriguez, D. 26-cm+CCD VSNET
1995 11 24.818 [13.9 mv Itoh, H. VSNET
1995 11 24.932 [14.7 mv AA Vanmunster, T. VSNET
1995 11 25.524 [14.5 mv Itoh, H. VSNET
1995 11 25.774 [14.7 mv AA Vanmunster, T. VSNET
1995 11 27.417 [13.9 mv Makiguchi, N. VSNET
1995 11 27.611 [14.3 mv Makiguchi, N. VSNET
1995 11 27.946 [15.5 mv Poyner, G. VSNET
DV Dra [UGWZ?, 15.0B - <21p]
============================
The (very) faint outburst of DV Dra, which first was announced in CVC 67
and later followed-up in CVC 69, has been further commented by Taichi Kato
and the Ouda team members of Kyoto University, Japan : "A 6-min V-band CCD
exposure of DV Dra taken at Ouda Station on November 25, 1995, clearly shows
DV Dra significantly brighter than in Downes & Shara (1993). Astrometry using
6 GSC stars (mean residual 0".3) gives a position of R.A.=18h17m24s.44 and
Decl.= +50d48'16".6 (J2000.0). This position is slightly different from that
given in Downes & Shara (1993), but is in good agreement with one (R.A. =
18h17m24s.44 , Decl.=+50d48'16".3) obtained by M. Iida from his outburst
CCD image (Iida, private communication). Reanalysis of the Nov. 13 CCD image
confirms this finding.
When adopting the POSS magnitude (<21), the present data seem to show that
the outburst may be still on its slow decline, or that the object may be in
"high-state" quiescence. Reexamination of POSS and the candidate by Downes &
Shara (1993) in digitized GSC survey plate would help identifying the nature
of this intriguing outburst."
The photometric summary, listed in CVC 69, thus becomes :
-----------------------------------------------------------------------
DATE (UT) MAGN MS SEQ OBSERVER REMARKS SOURCE
-----------------------------------------------------------------------
1995 10 30.398 17.8 CU GSC Iida, M. 20-cm+CCD VSNET
1995 10 30.405 17.5 CU GSC Iida, M. 20-cm+CCD VSNET
1995 10 30.411 17.2 CU GSC Iida, M. 20-cm+CCD VSNET
1995 10 31.372 17.8::CU GSC Iida, M. 20-cm+CCD VSNET
1995 11 01.394 17.5 CU GSC Iida, M. 20-cm+CCD VSNET
1995 11 13.388 18.60 V GSC *Ouda team 60-cm+CCD VSNET
1995 11 25.379 18.61 V GSC *Ouda team 60-cm+CCD VSNET
Tonny Vanmunster
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