J/AJ/130/1693 HST-ACS observations of 5 globular clusters (Brown+, 2005)
Stellar cluster fiducial sequences with the Advanced Camera for Surveys.
Brown T.M., Ferguson H.C., Smith E., Guhathakurta P., Kimble R.A.,
Sweigart A.V., Renzini A., Rich R.M., Vandenberg D.A.
<Astron. J., 130, 1693-1706 (2005)>
=2005AJ....130.1693B 2005AJ....130.1693B
ADC_Keywords: Clusters, globular ; Clusters, open ; Photometry
Keywords: globular clusters: general - globular clusters: individual
(NGC 6341, NGC 6752, NGC 104, NGC 5927, NGC 6528) -
open clusters and associations: individual (NGC 6791)
Abstract:
We present color-magnitude diagrams of five Galactic globular clusters
and one Galactic open cluster spanning a wide range of metallicity
(-2.1≲[Fe/H]≲+0.3), as observed in the F606W (broad V) and F814W (I)
bands with the Advanced Camera for Surveys (ACS) on the Hubble Space
Telescope. These clusters are part of two large ACS programs measuring
the star formation history in the Andromeda halo, tidal stream, and
outer disk. In these programs, the clusters serve as empirical
isochrones and as calibrators for the transformation of theoretical
isochrones to the ACS bandpasses. To make these data more accessible
to the community, for each cluster we provide a ridgeline tracing the
stars on the main sequence, subgiant branch, and red giant branch,
plus the locus of stars on the horizontal branch. In addition, we
provide the transformation of the Victoria-Regina isochrones to the
ACS bandpasses.
Description:
The globular clusters were observed as part of HST program GO-9453,
while NGC 6791 was observed as part of HST program GO-10265.
Objects:
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RA (2000) DE Designation(s) (Files)
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17 17 07.3 +43 08 12 NGC 6341 = M 92 (table2,table8)
19 10 51.8 -59 58 55 NGC 6752 = GCl 108 (table3,table9)
00 24 05.2 -72 04 58 NGC 104 = GCl 1 (table4,table10)
15 28 00.4 -50 40 22 NGC 5927 = GCl 35 (table5,table11)
18 04 49.6 -30 03 21 NGC 6528 = ESO 456- 48 (table6,table12)
19 20 53.0 +37 46 18 NGC 6791 = C 1919+377 (table7,table13)
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 43 31 NGC 6341 ridgeline and reddening coefficients
table3.dat 43 34 NGC 6752 ridgeline and reddening coefficients
table4.dat 43 41 NGC 104 ridgeline and reddening coefficients
table5.dat 43 35 NGC 5927 ridgeline and reddening coefficients
table6.dat 43 36 NGC 6528 ridgeline and reddening coefficient
table7.dat 43 24 NGC 6791 ridgeline and reddening coefficients
table8.dat 43 247 NGC 6341 HB locus and reddening coefficients
table9.dat 43 49 NGC 6752 HB locus and reddening coefficients
table10.dat 43 430 NGC 104 HB locus and reddening coefficients
table11.dat 43 272 NGC 5927 HB locus and reddening coefficients
table12.dat 43 181 NGC 6528 HB locus and reddening coefficients
table13.dat 43 5 NGC 6791 HB locus and reddening coefficients
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Byte-by-byte Description of file: table?.dat table1?.dat
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Bytes Format Units Label Explanations
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1- 6 F6.3 mag F606Wmag STMAG in F606W filter
8- 13 F6.3 mag alpha(F606W) α reddening coefficient in F606W (1)
15- 21 F7.3 --- beta(F606W) β reddening coefficient in F606W (1)
23- 28 F6.3 mag F814Wmag STMAG in F814W filter
30- 35 F6.3 mag alpha(F814W) α reddening coefficient in F814W (1)
37- 43 F7.3 --- beta(F814W) β reddening coefficient in F814W (1)
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Note (1): R=A/E(B-V)=α+βE(B-V)
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Marianne Brouty [CDS] 17-Feb-2006