J/AJ/134/2168 BVI photometry of M33 star clusters (Park+, 2007)
A catalog of new M33 star clusters based on Hubble space telescope WFPC2 images.
Park W.-K., Lee M.G.
<Astron. J., 134, 2168-2178 (2007)>
=2007AJ....134.2168P 2007AJ....134.2168P
ADC_Keywords: Galaxies, nearby ; Associations, stellar ; Photometry, UBVRI
Keywords: galaxies: clusters: general - galaxies: individual (M33) -
galaxies: photometry - galaxies: star clusters
Abstract:
We present the results of a survey for star clusters in M33 using HST
WFPC2 archive images. We have found 104 star clusters, including 32
new ones, in the images of 24 fields that were not included in
previous studies. Combining these with previous data in the
literature, we increase the number of M33 star clusters found in the
HST images to 242. We have derived BVI integrated photometry of these
star clusters from the CCD images taken with the CFH12k mosaic camera
at the CFHT.
Description:
We used WFPC2 images of M33 in the HST archive that were not used in
the previous studies by Chandar et al. (1999, Cat. J/ApJS/122/431,
2001, Cat. J/A+A/366/498). The images were obtained using various
filter combinations of F300W, F336W (U), F436W (B), F555W, F606W (V),
and F814W (I).
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table2.dat 74 32 Catalog of new M33 star clusters discovered in
this study
table3.dat 107 72 Catalog of previously known M33 star clusters
confirmed in this study
table4.dat 114 138 Catalog of previously known M33 star clusters
--------------------------------------------------------------------------------
See also:
J/AcA/48/455 : Globular Clusters in M31 and M33 (Mochejska+, 1998)
J/ApJS/122/431 : Star Clusters in M33 (Chandar+, 1999)
J/A+A/366/498 : VI photometry of M33 star clusters (Chandar+, 2001)
J/A+A/444/831 : New star clusters in M33 (Bedin+, 2005)
J/AJ/131/2478 : M31 and M33 UBVRI photometry (Massey+, 2006)
J/AJ/134/447 : Catalog of star cluster candidates in M 33 (Sarajedini+, 2007)
Byte-by-byte Description of file: table2.dat table3.dat table4.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 3 I3 --- [PL2007] Source number
4 A1 --- f_[PL2007] [*#] Flag about photometry (1)
6 I1 h RAh Hour of Right Ascension (J2000)
8- 9 I2 min RAm Minute of Right Ascension (J2000)
11- 15 F5.2 s RAs Second of Right Ascension (J2000)
17 A1 --- DE- Sign of Declination (J2000)
18- 19 I2 deg DEd Degree of Declination (J2000)
21- 22 I2 arcmin DEm Arcminute of Declination (J2000)
24- 28 F5.2 arcsec DEs Arcsecond of Declination (J2000)
30- 35 F6.3 mag Vmag ? The V band magnitude
36 A1 --- f_Vmag Near-edge of off V magnitude (2)
38- 42 F5.3 mag e_Vmag ? Error in Vmag
44- 49 F6.3 mag B-V ? The (B-V) color index
50 A1 --- f_B-V Near-edge of off (B-V) color (2)
52- 56 F5.3 mag e_B-V ? Error in B-V
58- 63 F6.3 mag V-I ? The (V-I) color index
65- 69 F5.3 mag e_V-I ? Error in V-I
71- 74 F4.2 mag E(B-V) The reddening (3)
76- 79 F4.2 mag e_E(B-V) ? Error in E(B-V)
81-114 A34 --- ONames Cross-identification with previous catalogs (4)
--------------------------------------------------------------------------------
Note (1): Flags as follows:
* = Magnitude and colors of the star cluster is measured on HST/WFPC2
image with r=2.2" and 1.0" apertures for V and color measurement,
respectively instead of CFH12k mosaic CCD image with r=4.0" and
r=2.0" apertures for V and color measurement, respectively.
# = No photometry could be made from CFH12k mosaic CCD images nor
HST/WFPC2 images
Note (2): Flags as follows:
: = the cluster is located near the edge of the CCD chip, leading to
measurement was made with smaller apertures
f = Happened to be off from CFHT CFH12k images
Note (3): Measured with UBVRI PSF photometry data by Massey et al. (2006,
Cat. J/AJ/131/2478). The uncertainties of the values are 0.05.
Note (4): Identifications are abbreviated as:
* B from Bedin et al. (2005, Cat. J/A+A/444/831),
* CBF from Chandar et al. (1999, Cat. J/ApJS/122/431 and
2001, Cat. J/A+A/366/498)
* CS from Christian & Schommer (1982ApJS...49..405C 1982ApJS...49..405C)
* MKKSS from Mochejska et al. (1998, Cat. J/AcA/48/455)
* MD from Melnick & D'Odorico (1978A&AS...34..249M 1978A&AS...34..249M) based on the
coordinates given by Ma et al. (2002ChJAA...2..197M 2002ChJAA...2..197M),
* SBGHS from Sarajedini et al. (2007, Cat. J/AJ/134/447)
--------------------------------------------------------------------------------
History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 07-Feb-2010