J/MNRAS/485/3042 UBVRI photometry in 48 globular clusters (Stetson+, 2019)
Homogeneous photometry. VII. Globular clusters in the Gaia era.
Stetson P.B., Pancino E., Zocchi A., Sanna N., Monelli M.
<Mon. Not. R. Astron. Soc., 485, 3042-3063 (2019)>
=2019MNRAS.485.3042S 2019MNRAS.485.3042S (SIMBAD/NED BibCode)
ADC_Keywords: Clusters, globular ; Photometry, UBVRI
Keywords: standards - techniques: photometric - catalogues -
globular clusters: general
Abstract:
We present wide-field, ground-based Johnson-Cousins UBVRI photometry
for 48 Galactic globular clusters based on almost 90000 public and
proprietary images. The photometry is calibrated with the latest
transformations obtained in the framework of our secondary standard
project, with typical internal and external uncertainties of order a
few millimagnitudes. These data provide a bridge between existing
small-area, high-precision HST photometry and all sky-catalogues from
large surveys like Gaia, SDSS, or LSST. For many clusters, we present
the first publicly available photometry in some of the five bands
(typically U and R). We illustrate the scientific potential of the
photometry with examples of surface density and brightness profiles
and of colour-magnitude diagrams, with the following highlights: (i)
we study the morphology of NGC 5904, finding a varying ellipticity and
position angle as a function of radial distance; (ii) we show
$U$-based colour-magnitude diagrams and demonstrate that no cluster in
our sample is free from multiple stellar populations, with the
possible exception of a few clusters with high and differential
reddening or field contamination, for which more sophisticated
investigations are required. This is true even for NGC 5694 and Terzan
8, that were previously considered as (mostly) single-population
candidates.
Description:
These tables contain a summary of the used datasets, the cluster list,
and more details on the data credits and data sources.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 102 37 Observation summary
table2.dat 154 48 Cluster list and fits image informations
table4.dat 185 4890955 Final catalogue
tablea1.dat 271 390 Run listing with data credits
tablea2.dat 72 1416 Data statistics by cluster
fits/* . 48 Individual fits images
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See also:
J/PASP/110/533 : BR photometry of Fornax bright stars (Stetson+ 1998)
J/PASP/115/413 : BVI photometry in the open cluster NGC 6791 (Stetson+, 2003)
J/PASP/117/1325 : BVRI photometry in NGC 4147 (Stetson+, 2005)
J/PASP/126/616 : Variable stars in Leo I dSph (Stetson+, 2014)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 16 A16 --- Site Observing site
18- 30 A13 --- Tel Telescope
32- 62 A31 --- Inst Instruments list
64- 72 A9 --- Date Years covered
74- 77 I4 --- nU Number of images in U band
79- 82 I4 --- nB Number of images in B band
84- 87 I4 --- nV Number of images in V band
89- 92 I4 --- nR Number of images in R band
94- 97 I4 --- nI Number of images in I band
99-102 I4 --- nO Number of images in other bands
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 7 A7 --- Cluster Cluster name
10- 18 A9 --- AltName Alternate cluster name, if any
20- 21 I2 h RAh Right Ascension (J2000)
23- 24 I2 min RAm Right Ascension (J2000)
26- 30 F5.2 s RAs Right Ascension (J2000)
32 A1 --- DE- Declination sign (J2000)
33- 34 I2 deg DEd Declination (J2000)
36- 37 I2 arcmin DEm Declination (J2000)
39- 42 F4.1 arcsec DEs Declination (J2000)
44- 48 F5.2 [-] [Fe/H] Cluster metallicity from Harris catalogue
50- 53 F4.2 mag E(B-V) Cluster reddening from Harris catalogue
55- 60 F6.2 mag VMAGtot Cluster magnitude from Harris catalogue
62- 66 F5.2 mag (M-m)V Cluster distance modulus from Harris catalogue
68- 71 I4 --- Nimages Number of images used
73- 78 I6 --- Nstars Number of stars in table4.dat
80- 82 I3 --- NRR Number of found RR Lyrae
84- 87 I4 pix X0 X of cluster centroid in pixel coordinates
89- 92 I4 pix Y0 Y of cluster centroid in pixel coordinates
94- 96 I3 --- Rank Cluster rank
98-102 I5 --- Nx Number of pixels along X-axis
104-108 I5 --- Ny Number of pixels along Y-axis
110-132 A23 "datime" Obs.date Observation date
134-139 I6 Kibyte size Size of FITS file
141-154 A14 --- FileName Name of FITS file, in subdirectory fits
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 7 A7 --- Cluster Globular cluster (GC) name
9- 14 I6 --- Star Star ID (unique for each GC)
16- 24 F9.3 arcsec Xpos X coordinate in arcseconds
26- 34 F9.3 arcsec Ypos Y coordinate in arcseconds
36- 41 F6.3 mag Umag ? Johnson U magnitude
43- 48 E6.4 mag e_Umag ? U magnitude error
50- 51 I2 --- o_Umag Number of U measurements
53- 58 F6.3 mag Bmag ? Johnson B magnitude
60- 65 E6.4 mag e_Bmag ? B magnitude error
67- 70 I4 --- o_Bmag Number of B measurements
72- 77 F6.3 mag Vmag Johnson V magnitude
79- 84 E6.4 mag e_Vmag V magnitude error
86- 89 I4 --- o_Vmag Number of V measurements
91- 96 F6.3 mag Rmag ? Cousins R magnitude
98-103 E6.4 mag e_Rmag ? R magnitude error
105-108 I4 --- o_Rmag Number of R measurements
110-115 F6.3 mag Imag ? Cousins I magnitude
117-122 E6.4 mag e_Imag ? I magnitude error
124-126 I3 --- o_Imag Number of I measurements
128-133 F6.3 --- Chi DAOPHOT's χ parameter
135-143 F9.3 --- Sharp DAOPHOT's sharp parameter
145-154 F10.3 --- Vary Welch-Stetson variability index
156-161 F6.1 --- Weight Weight of variability index
163-164 I2 h RAh Right ascension (J2000)
166-167 I2 min RAm Right ascension (J2000)
169-173 F5.2 s RAs Right ascension (J2000)
175 A1 --- DE- Declination sign (J2000)
176-177 I2 deg DEd Declination (J2000)
179-180 I2 arcmin DEm Declination (J2000)
182-185 F4.1 arcsec DEs Declination (J2000)
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Byte-by-byte Description of file: tablea1.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- Run Run unique label
12- 34 A23 --- Date Run date
36- 51 A16 --- Site Observing site
53- 65 A13 --- Tel Telescope
67- 85 A19 --- Inst Instrument
87- 89 I3 --- nU Number of U band images
91- 93 I3 --- nB Number of B band images
95- 98 I4 --- nV Number of V band images
100-103 I4 --- nR Number of R band images
105-107 I3 --- nI Number of I band images
109-111 I3 --- nO Numbero of images in other bands
113-114 I2 --- Multiplex ? Number of CCD in case of CCD mosaics
116-187 A72 --- Program Information about observing program, if any
189-256 A68 --- Observer Information about observer(s), if any
258-271 A14 --- Source Information about data source(s), if any
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Byte-by-byte Description of file: tablea2.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- Cluster Cluster name
11- 20 A10 --- Run Unique run label
22- 44 A23 --- Dates Observation date(s)
46- 47 I2 --- nU Number of U band images
49- 51 I3 --- nB Number of B band images
53- 56 I4 --- nV Number of V band images
58- 61 I4 --- nR Number of R band images
63- 65 I3 --- nI Number of I band images
67- 69 I3 --- nO Number of images in other bands
71- 72 I2 --- Multiplex ? Number of CCDs in case of CCD mosaics
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Acknowledgements:
Elena Pancino, pancino(at)arcetri.inaf.it
References:
Stetson et al., Paper I 1998PASP..110..533S 1998PASP..110..533S, Cat. J/PASP/110/533
Stetson, Paper II 2000PASP..112..925S 2000PASP..112..925S
Stetson et al., Paper III 2003PASP..115..413S 2003PASP..115..413S, Cat. J/PASP/115/413
Stetson, Paper IV 2005PASP..117..563S 2005PASP..117..563S
Stetson et al., Paper V 2005PASP..117.1325S 2005PASP..117.1325S, Cat. J/PASP/117/1325
Stetson et al., Paper VI 2014PASP..126..616S 2014PASP..126..616S, cat. J/PASP/126/616
(End) Elena Pancino [INAF, Italy], Patricia Vannier [CDS] 23-May-2019