[vsnet-obs 23434] (fwd) Hassforther's new variable stars

[Taichi Kato <tkato>]

(fwd) Hassforther's new variable stars

From: Bela1996@aol.com
Date: Sat, 25 Sep 1999 19:53:19 EDT
Subject: new variable stars

Hello,

I've found some new variable Stars in the Stardial-Field 1900.

Here are the first ten stars with positions, identifications and some
comments. I checked a couple of catalogs (GCVS, NSV, MISAO, TASS and
some other) and made recherches in SIMBAD - nothing was found, so I'm
sure, that these stars are new. I checked the variability of my=20
findings with the TASS-Database
 http://vsnet.tass-survey.org/tass/www_scripts/make_chart.html
and could verify all but one star (declination too much in the south for=20
TASS).
Lightcurves are published on my homepage=20
http://members.aol.com/bela1998/stard2.htm=20
One star (No 04) is already published in the IBVS (No 4742), for
another star (No 22) I published a lightcurve in the magazin of the
German Working Group on Variable Stars (BAV) No 3 / 1999, p. 144.

The Stardial-images (http://vsnet.astro.uiuc.edu/stardial/) are immediately
available on the web. Three years of sky-patrol provide a rich
hunting-ground for the variable-star-observer. The new variables were
found by blinking only four images! By verifying the findings in
animation-mode (with 30 images) I found some more new stars.
For the light-curves all good images were used (ca 190).
Some stars (Nos 05, 10, 11) are too faint, therefore I took=20
the TASS-measurements for a first evaluation.

The Stardial-project is one of the most fascinating aspects of the WEB,
many thanks to Peter McCullough!!
The TASS-Database was a very valuable source to check and verify my
findings. Many thanks to the TASS-people!!
This reaearch made use of the SIMBAD data base, operated by the
CDS at Strasbourg, France.

Bela Hassforther, Ringstr. 27, D-69115 Heidelberg, Germany
email: bela1996@aol.com

----------------------------------------------------------------

Positions and Identifications

No  (2000)                 GSC        IRAS         USNO-A2.0      TASS_ID

04  19 06 05.7  -01 29.98  -          19035-0134   0825-14421517  12051011

05  19 08 53.1  -02 01.31  =E2=80=93          19062-0206   =E2=80=93          
    =
11949916

08  19 01 58.6  -02 00.78  5132 390   18593-0205   0825-14114980  1717020

10  19 05 04.5  -03 00.80  5132 1421  =E2=80=93            0825-14347108  11=
949324

11  19 02 22.3  -03 13.34  5132 1707  =E2=80=93            0825-14145606  17=
19810

12  18 58 57.3  -03 04.98  5119 1004  18563-0309   =E2=80=93              11=
948281

15  19 08 47.6  -04 02.76  =E2=80=93          19061-0407   0825-14616754  17=
66554

20  19 02 04.1  -07 42.99  5707 2085  18593-0747   =E2=80=93              =
=E2=80=93

22  19 14 17.7  -03 04.91  5133 1747  19116-0310   0825-14981814  1803550

27  19 01 40.5  -02 11.96  5132 1121  18590-0216   0825-14092135  1714878


Comments:

No  Type     Magnitudes (TASS)  Comments

04  M        V=3D13.43 I=3D10.87    see IBVS 4742; P ca 250d

05  M        I=3D10.97 - < 12.0   P ca 320d, Max before 2450620, around 2450=
920,
                                well before 2451310, very faint, very red

08  SR       V=3D12.52, I=3D 8.42   amplitude ca 0.7, very red

10  EB/EW    V=3D11.09, I=3D10.68   in Tycho-Cat., Period not sure (aliasses=
!)

11  EB/EW    V=3D11,26, I=3D10,76   Period not sure (aliasses!)

12  SR       V=3D11.92, I=3D8.28    rather small amplitude

15  M        V=3D14.09, I=3D8.70    P ca 400d, extremly red (V-I =3D 5,4) (!=
!)

20  M/SRA                       P ca 190 or 380 d (large seasonal gaps)
                                not in USNO; SERC-V: ca 13,1mag

22  SR       V=3D12.62, I=3D8.57    P =3D 75 and 700 d, very red

27  SR       V=3D13.63, I=3D8.68    P ca 100 d, extremly red (V-I =3D 5)

VSNET Home Page

Return to Daisaku Nogami

---

vsnet-adm@kusastro.kyoto-u.ac.jp