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[vsnet-obs 2260] CVC 84 (DX And, NSV 4838, LY Hya, PG1104+022)

BELGIAN ASTRONOMICAL SOCIETY V.V.S. -  Working Group Variable Stars
Cataclysmic Variables Circular No.84                 1996, March 02
Ed.: T. Vanmunster, Walhostraat 1A, 3401 Landen, BELGIUM
     Internet: tvanmuns@innet.be                  TEL. 32-11-831504
     --------------------------------------------------------------
         The CATACLYSMIC VARIABLES Home Page: http://vsnet.cv.psi.edu
===================================================================

DX And [UG, 10.9p - 16.4p]
==========================

Lasse Jensen, Farum, Denmark reports an outburst of this dwarf nova,
which is on the TA/BAAVSS Recurrent Objects Programme. Confirmation 
has been received from Eric Broens, Mol, Belgium. 

1996 Feb. 24.750 UT, [14.2  (R. Fidrich, Hungary, 0.45-m refl.);
     Feb. 29.758 UT,  13.0  (L. Jensen, Denmark, 0.33-m refl.);
     Mar. 01.814 UT,  12.9: (E. Broens, Belgium, 0.33-m refl., low, clouds);
     Mar. 01.828 UT,  12.8  (E. Broens);

The last confirmed outburst of DX And was reported independently by
J. Nordby, NM and T. Vanmunster, Belgium on June 18, 1995. The object
reached mag. 12.1 [CVC 42]. A detailed photometric summary of that
outburst appeared in [CVC 45].

Spectroscopic and photometric observations of DX And, as well as its
physical parameters, are discussed in length in (Drew, J.E. et al., 
1993, MNRAS, 260, 803-818).


NSV 4838 [UG, 14.5 - 16.5p]
===========================

Peter Kroll, Sonneberg Observatory, Germany, emails : "My impression 
is that there might be something wrong with the NSV 4838 sequence 
published in the Cataclysmic Variables Home Page. I found a star of 
about 16m just 2 arcmin N to the position indicated in the finding chart 
and no star brighter than 19m at the given position. There are two very 
similar star constellations in the neighbourhood, so I guess the painted 
position is simply at the corresponding other (wrong) place."

Note from the Editor : most of the NSV based finder charts in the Cata-
clysmic Variables Home Page have been generated using coordinates re-
trieved from the NSV catalog. Only in a number of cases, it has been 
possible to compare these positions with additional reference material. 
It therefore is not unlikely that positional differences up to several 
arcminutes may exist.


LY Hya [UG:, 17.4v - 18.4v]
===========================

Steve Howell, Astrophysics Group, Planetary Science Institute, AZ emails :
"I did obtain IR spectra of LY Hya and it does look to be an SU UMa type 
variable. The spectra near 2 microns, show strong H emission lines 
(Brackett and Paschen series). But I do not believe there is much known 
about it in terms of outbursts. However, it should be a good target as it 
is fairly bright."


PG1104+022 (= Leo1) [CV:, 14.1B]
================================

Ron Downes, Space Telescope Science Institute, Baltimore, Maryland informs 
us that PG1104+022 (also known as 'Leo1' in 'A Catalog And Atlas of Cata-
clysmic Variables', and included in the CVAP), in reality is a hot degene-
rate, according to research done by Zwitter and Munari (published in 1994, 
A&A Supp. 107, 503).


Tonny Vanmunster