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J/AJ/132/2187  MCT1 photometry of NGC 5128 globular clusters (Harris+, 2006)

Structural parameters for globular clusters in NGC 5128. II. Hubble Space Telescope ACS imaging and new clusters. Harris W.E., Harris G.L.H., Barmby P., McLaughlin D.E., Forbes D.A. <Astron. J., 132, 2187-2197 (2006)> =2006AJ....132.2187H
ADC_Keywords: Galaxies, nearby ; Clusters, globular ; Photometry, CMT1T2V Keywords: galaxies: elliptical and lenticular, cD - galaxies: individual (NGC 5128) - galaxies: star clusters Abstract: We report the first results from an imaging program with the ACS on the Hubble Space Telescope designed to measure the structural characteristics of a wide range of globular clusters in NGC 5128, the nearest giant elliptical galaxy. From 12 ACS WFC fields we have measured a total of 62 previously known globular clusters and have discovered 69 new high-probability cluster candidates not found in any previous work. We present magnitudes and color indices for all of these, along with rough measurements of their effective diameters and ellipticities. Description: Our HST program 10260 was targeted at imaging many of the most massive known GCs in both M31 and NGC 5128. The M31 material will be presented in a later paper (P. Barmby et al. 2006, in preparation). In NGC 5128, 12 fields were imaged, centered on the clusters C3, C6, C7, C12, C14, C18, C19, C25, C29, C30, C32, and C37 (Harris et al., 1992AJ....104..613). We used the ACS in its Wide Field Channel (field size 3.3" and scale 0.05"/pix), and with a total exposure time on each field of one full orbit of 2500s divided into three equal subexposures, in the F606W ("Wide V") filter. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 88 62 ACS/WFC data for previously known NGC 5128 clusters table2.dat 80 69 ACS/WFC data for new NGC 5128 clusters table3.dat 47 27 Revised coordinates for clusters from paper I, Harris et al., 2002AJ....124.1435H
See also: J/ApJS/150/367 : Globular clusters in NGC 5128 (Peng+, 2004) J/A+A/369/812 : UVKs photometry of NGC 5128 globular clusters (Rejkuba, 2001) J/ApJ/560/675 : Chandra X-ray point sources in Cen A (Kraft+, 2001) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 14 A14 --- Cluster Cluster name (1) 16- 17 I2 h RAh Hour of Right Ascension (J2000) 19- 20 I2 min RAm Minute of Right Ascension (J2000) 22- 26 F5.2 s RAs Second of Right Ascension (J2000) 28 A1 --- DE- Sign of the Declination (J2000) 29- 30 I2 deg DEd Degree of Declination (J2000) 32- 33 I2 arcmin DEm Arcminute of Declination (J2000) 35- 38 F4.1 arcsec DEs Arcsecond of Declination (J2000) 40- 44 F5.2 arcmin R Radius from NGC 5128 center 46- 50 F5.1 deg PA Azimuthal angle measured East of North 52- 57 F6.3 mag T1mag Washington system T1 (red ∼633nm) magnitude 59- 63 F5.3 mag M-T1 Washington system M-T1 color index 65- 69 F5.3 mag C-T1 ? Washington system C-T1 color index 71- 74 F4.2 --- ell The imexamine ellipticity 76- 80 F5.2 pix FWHM The imexamine Moffat-profile FWHM (2) 82- 88 A7 --- Field ACS field(s)
Note (1): For the cluster identification numbers: CNNN = [VHH81] NN, Harris et al. (1992AJ....104..613H) GNNN = [HGH92] GNNN, Harris et al. (1992AJ....104..613H) PFFNN = [PFF2004] gc NNN, Peng et al., (2004, Cat. J/ApJS/150/367) WHHNNN = [WHH2005] NNN, Woodley et al. (2005AJ....129.2654W) fN-.GCNN = [R2001b] fN.GC-NN, Rejkuba (2001, Cat. J/A+A/369/812) AATNNNNN = [BBP2008] AATNNNNN, Beasley et al. (2006AJ....131..814B) and 2008, Cat. J/MNRAS/386/1443 KNNN = [KKF2001] NNN, Kraft et al. (2001, Cat. J/ApJ/560/675) Note (2): Conveniently, at the 3.9Mpc distance of NGC 5128, one pixel of 0.05" corresponds to a linear scale of very close to 1pc.
Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 4 A4 --- Cluster Cluster name (CNNN) (1) 6- 7 I2 h RAh Hour of Right Ascension (J2000) 9- 10 I2 min RAm Minute of Right Ascension (J2000) 12- 16 F5.2 s RAs Second of Right Ascension (J2000) 18 A1 --- DE- Sign of the Declination (J2000) 19- 20 I2 deg DEd Degree of Declination (J2000) 22- 23 I2 arcmin DEm Arcminute of Declination (J2000) 25- 28 F4.1 arcsec DEs Arcsecond of Declination (J2000) 30- 34 F5.2 arcmin R Radius from NGC 5128 center 36- 40 F5.1 deg PA Azimuthal angle measured East of North 42- 47 F6.3 mag T1mag Washington system T1 (red ∼633nm) magnitude 49- 53 F5.3 mag M-T1 ? Washington system M-T1 color index 55- 59 F5.3 mag C-T1 ? Washington system C-T1 color index 61- 64 F4.2 --- ell The imexamine ellipticity 66- 70 F5.2 pix FWHM The imexamine Moffat-profile FWHM (2) 72- 78 A7 --- Field ACS field(s) 80 I1 --- Note ? Additional note (3)
Note (1): Labelled continuing with the C-numbers from Harris et al. (1992AJ....104..613H) and Paper I (2002AJ....124.1435H), starting at C111. [VHH81] NNN in Simbad Note (2): Conveniently, at the 3.9 Mpc distance of NGC 5128, one pixel of 0.05 arcsecond corresponds to a linear scale of very close to 1 pc. Note (3): Note ad follows: 1 = Faint globular? 2 = Very crowded, in inner bulge region 3 = Very compact globular or possible star 4 = Possible globular, slightly elliptical 5 = Globular next to very bright star
Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
1- 4 A4 --- Cluster Cluster name (GNNN, CNNN) (1) 6- 7 I2 h RAh right ascension (J2000.0) 9- 10 I2 min RAm right ascension (J2000.0) 12- 16 F5.2 s RAs right ascension (J2000.0) 18 A1 --- DE- Declination sign (J2000.0) 19- 20 I2 deg DEd Declination (J2000.0) 22- 23 I2 arcmin DEm Declination (J2000.0) 25- 28 F4.1 arcsec DEs Declination (J2000.0) 30- 35 F6.3 mag T1mag Washington system T1 (red ∼633nm) magnitude 37- 41 F5.3 mag M-T1 Washington system M-T1 colour index 43- 47 F5.3 mag C-T1 Washington system C-T1 colour index
Note (1): CNNN are [VHH81] NNN in Simbad, GNNN are [HGH92] GNNN in Simbad
History: From electronic version of the journal References: Harris et al., Paper I 2002AJ....124.1435H McLaughlin et al., Paper III 2008MNRAS.384..563M
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 24-Jul-2008
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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