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J/ApJ/682/135             CCD photometry of M60                     (Lee+, 2008)

Washington CCD photometry of the globular cluster system of the giant elliptical galaxy M60 in Virgo. Lee M.G., Park H.S., Kim E., Hwang H.S., Kim S.C., Geisler D. <Astrophys. J., 682, 135-154 (2008)> =2008ApJ...682..135L
ADC_Keywords: Clusters, globular ; Photometry, CCD ; Galaxies, nearby ; Photometry, CMT1T2V Keywords: galaxies: clusters: general - galaxies: individual (M60) - galaxies: photometry - galaxies: star clusters Abstract: We present a photometric study of the globular clusters (GCs) in the giant elliptical galaxy M60 in the Virgo Cluster, based on deep, relatively wide field Washington CT1 CCD images. The CMD reveals a significant population of GCs in M60 and a large number of young luminous clusters in NGC 4647, a small companion spiral northwest of M60. The color distribution of the GCs in M60 is clearly bimodal, with a blue peak at (C-T1)=1.37 and a red peak at (C-T1)=1.87. We derive two new transformation relations between the (C-T1)0 color and [Fe/H] using the data for the GCs in our Galaxy and M49. Using these relations, we derive the metallicity distribution of the GCs in M60, which is also bimodal: a dominant metal-poor component with center at [Fe/H]=-1.2, and a weaker metal-rich component with center at [Fe/H]=-0.2. We estimate the total number of the GCs in M60 to be 3600±500 and the specific frequency to be SN=3.8±0.4. Description: CCD images of M60 were obtained on the photometric nights of 1997 April 9 and 10 (UT) at the Kitt Peak National Observatory (KPNO) 4m telescope using the 2048x2048 pixel CCD camera at the prime focus. Washington C and Kron-Cousins R filters were used. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table3.dat 68 4708 CT1 photometry of the measured point sources with σ(C-T1)<0.3 in M60
See also: J/ApJ/674/857 : Radial velocities and CT1 magnitudes in M60 galaxy (Lee+, 2008) J/MNRAS/355/608 : NGC 4649 (M60) globular clusters (Forbes+, 2004) Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
1- 5 I5 --- Seq Source ID number (<[LHP2008] NNNNN> in Simbad) 7- 13 F7.2 pix Xpix The X-coordinate on the chip (1) 15- 21 F7.2 pix Ypix The Y-coordinate on the chip (1) 23- 32 F10.6 deg RAdeg Right Ascension (J2000) in decimal degrees 34- 42 F9.6 deg DEdeg Declination (J2000) in decimal degrees 44- 49 F6.3 mag T1mag The T1 band magnitude 51- 55 F5.3 mag e_T1mag Error in T1mag 57- 62 F6.3 mag C-T1 The (C-T1) color index 64- 68 F5.3 mag e_C-T1 Error in C-T1
Note (1): Xpix and Ypix increase toward east and north, respectively. A pixel corresponds to 0.47 arcsec.
History: From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 04-Nov-2010
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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