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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
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
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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