J/A+A/351/526 NGC 2172 CCD BVI photometry (Ripepi+, 1999)
CCD photometry of young MC clusters. I: NGC 2172.
Ripepi V., Brocato E., Castellani V.
<Astron. Astrophys. 351, 526 (1999)>
=1999A&A...351..526R 1999A&A...351..526R
ADC_Keywords: Magellanic Clouds ; Clusters, open ; Photometry, CCD
Keywords: stars: evolution - stars: fundamental parameters -
stars: luminosity function, mass function -
galaxies: Magellanic Clouds - galaxies: star clusters
Abstract:
We present a new CCD photometry for the young LMC cluster NGC 2172,
giving B, V, I magnitudes for more than 600 stars within 70" from the
cluster center, down to -approximately- V=21mag. After correction
for completeness and field stars contamination, we discuss the cluster
HR diagram and the MS luminosity function in the light of current
evolutionary theories and in connection with the problem of cluster
age.
Description:
Observations were carried out in the BV and iGunn filters during
November 1996 with the 0.9m. "Dutch" telescope at ESO (La Silla,
Chile). The telescope was equipped with a TEK 512x512 pixels CCD
(ESO #33); the scale was 0.44 arcsec/pixel, with a total field of about
3.8 arcmin.
Objects:
------------------------------------------
RA (2000) DE Designation(s)
------------------------------------------
06 00 05.0 -68 38 12 NGC 2172
------------------------------------------
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table2.dat 73 897 BVI photometry
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table2.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 4 I4 --- RBC Sequential number,
Cl* NGC 2172 RBC NNNN in Simbad
6- 11 F6.2 pix Xpos X position (1)
13- 18 F6.2 pix Ypos Y position (1)
20- 25 F6.3 mag Vmag V magnitude
27- 32 F6.3 mag B-V ?=0.000 B-V colour index
34- 39 F6.3 mag V-I ?=0.000 V-I (Gunn) colour index
41- 45 F5.3 mag e_Vmag rms uncertainty on Vmag
47- 51 F5.3 mag e_Bmag ?=0.000 rms uncertainty on Bmag
53- 57 F5.3 mag e_Imag ?=0.000 rms uncertainty on Gunn Imag
59- 60 I2 --- o_Vmag Number of observation in V band
62- 63 I2 --- o_Bmag Number of observation in B band
65- 66 I2 --- o_Imag Number of observation in Gunn I band
68- 73 F6.2 arcsec Dist Distance to the cluster center
--------------------------------------------------------------------------------
Note (1): 1 pix = 0.44".
Center coordinates: 06 00 05.6 -68 38 14 (J2000.0)
--------------------------------------------------------------------------------
History: Copied at ftp://ftp.na.astro.it/pub/NGC2172/n2172.dat
(End) Patricia Vannier [CDS] 15-Nov-2004