J/MNRAS/350/679 BV photometry of NGC 300 variables (Mennickent+, 2004)
The Araucaria Project. Variable stars outside the Local Group: NGC 300.
Mennickent R.E., Pietrzynski G., Gieren W.
<Mon. Not. R. Astron. Soc., 350, 679-684 (2004)>
=2004MNRAS.350..679M 2004MNRAS.350..679M
ADC_Keywords: Stars, variable ; Photometry, UBV
Keywords: supergiants - Cepheids - stars: Wolf - Rayet -
galaxies: stellar content
Abstract:
We have performed a search for variable stars in the Sculptor Group
spiral galaxy NGC 300 using wide-field multi-epoch BV photometry up to
a limiting magnitude V∼23. Apart from the Cepheid variables in this
galaxy already reported in an earlier paper by Pietrzynski et al.
(2002, Cat. J/AJ/123/789) and the variable blue supergiants reported
by Bresolin et al. (2002ApJ...567..277B 2002ApJ...567..277B), we have identified 26
additional periodic variables, with periods ranging from 0.2 to 190d,
and 121 slow variables. Two of these newly discovered variables are
Galactic foreground stars (one of them is a W UMa system), and three
correspond to previously identified Wolf-Rayet stars. 16 stars are new
Cepheids, and the other objects span a huge range in colours and
represent a mixture of different types of luminous variables.
Description:
CCD BV images centered on NGC 300 were obtained with the Wide-Field
Camera at the 2.2m ESO/MPI telescope on La Silla during 29 nights
spread over a 5.3 month interval. The observations started on 1999
July 31 and lasted until 2000 January 8.
Objects:
-----------------------------------------
RA (2000) DE Designation(s)
-----------------------------------------
00 54 53.5 -37 40 59 NGC 300
-----------------------------------------
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 56 147 Detected variable stars
--------------------------------------------------------------------------------
See also:
J/AJ/123/789 : ARAUCARIA project: NGC 300 Cepheid var. (Pietrzynski+, 2002)
J/AJ/128/1167 : ARAUCARIA project: NGC 300 Cepheid Var. II (Gieren+, 2004)
Byte-by-byte Description of file: table1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 3 I3 --- [MPG2004] Sequential number
5- 6 I2 h RAh Right ascension (J2000.0)
8- 9 I2 min RAm Right ascension (J2000.0)
11- 15 F5.2 s RAs Right ascension (J2000.0)
17 A1 --- DE- Declination sign (J2000.0)
18- 19 I2 deg DEd Declination (J2000.0)
21- 22 I2 arcmin DEm Declination (J2000.0)
24- 27 F4.1 arcsec DEs Declination (J2000.0)
29- 31 I3 --- o_<B-V> Number of B,V pairs (1)
33- 37 F5.2 mag <B-V> Mean B-V colour index
40- 43 F4.2 mag e_<B-V> rms uncertainty on <B-V>
46- 50 F5.2 mag <Vmag> Mean V magnitude
53- 56 F4.2 mag e_<Vmag> rms uncertainty on <Vmag>
--------------------------------------------------------------------------------
Note (1): This is a lower limit for the number of V data points.
--------------------------------------------------------------------------------
History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 11-Feb-2005