J/MNRAS/370/1429 V photometry of bright stars of M33 (Shporer+, 2006)
Long-term V-band monitoring of the bright stars of M33 at the Wise Observatory.
Shporer A., Mazeh T.
<Mon. Not. R. Astron. Soc. 370, 1429 (2006)>
=2006MNRAS.370.1429S 2006MNRAS.370.1429S
ADC_Keywords: Galaxies, nearby ; Stars, variable ; Photometry
Keywords: galaxies: individual (M33) - stars: variable: other
Abstract:
We have conducted a long-term V-band photometric monitoring of M33 on
95 nights during four observing seasons (2000-2003). A total number
of 6418 light curves of bright objects in the range of 14-21mag
have been obtained. All measurements are publicly available. A total
of 127 new variables were detected, of which 28 are periodic. 10
previously known non-periodic variables were identified as periodic,
three of which are Cepheids, and another previously known periodic
variable was identified as an eclipsing binary. Our derived periods
range from 2.11 to almost 300d. For 50 variables we have combined our
observations with those of the DIRECT project, obtaining light curves
of up to 500 measurements, with a time-span of ∼7yr. We have
detected a few interesting variables, including a 99.3d periodic
variable with a 0.04mag amplitude, at the position of supernova
remnant (SNR) 19.
Description:
We observed M33 with the 1-m telescope at the Wise Observatory from
2000 September until 2003 November. Observations were carried out with
a standard Cousins-Johnson V filter.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table11.dat 85 290 List of identified variables
--------------------------------------------------------------------------------
See also:
J/AJ/121/870 : BVI photometry of Variables in M33 (Macri+, 2001)
J/AJ/121/861 : BVI photometry of central part of M33 (Macri+, 2001)
J/AJ/121/2032 : DIRECT variables in M33A field (Mochejska+, 2001)
J/AJ/122/2477 : DIRECT variables in M33B field (Mochejska+, 2001)
Byte-by-byte Description of file: table11.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 6 A6 --- [SM2006] Object designation (WNNNN)
8- 9 I2 h RAh Right ascension (J2000.0)
11- 12 I2 min RAm Right ascension (J2000.0)
14- 18 F5.2 s RAs Right ascension (J2000.0)
20 A1 --- DE- Declination sign (J2000.0)
21- 22 I2 deg DEd Declination (J2000.0)
24- 25 I2 arcmin DEm Declination (J2000.0)
27- 30 F4.1 arcsec DEs Declination (J2000.0)
32 A1 --- Type Variability type
34- 45 E12.7 d Per ?=- Period of periodic variables
("-" for non-periodic)
47- 67 A21 --- Name Designation of known variables, usually taken
from the DIRECT project ("-" for new variables)
69 A1 --- TypeL Previously known variability type
("-" for new variables)
71- 80 E10.4 d PerL ?=- Previously known period of periodic variables
("-" for non-periodic or new variables)
82- 85 A4 --- Com Comments (coma separated) (1)
--------------------------------------------------------------------------------
Note (1): References in comments use the following numbers:
1 = New variable.
2 = Newly classified variable.
3 = Position in DIRECT M33C field, reported in Table 9 of
Macri et al. (2001AJ....121..870M 2001AJ....121..870M)
4 = Position in DIRECT M33C field (new variable).
5 = Position outside all DIRECT fields (new variable).
6 = Object detected as periodic variable by Shemmer et al.
(2000MNRAS.311..698S 2000MNRAS.311..698S).
7 = Astrometric matching between Wise and DIRECT objects can not be
determined accurately due to the crowded region.
8 = classified as a Long Period Variable (LPV) by Kinman,
Mould & Wood (1987AJ.....93..833K 1987AJ.....93..833K).
9 = Object detected as variable by Hubble & Sandage (1953ApJ...118..353H 1953ApJ...118..353H)
10 = Period derived from the combined light curve (See sub-section 3.3)
--------------------------------------------------------------------------------
Acknowledgements: A. Shporer, shporer(at)wise.tau.ac.il
(End) Avi Shporer [TAU, Israel], Patricia Vannier [CDS] 29-Jul-2006