J/ApJ/518/262 CCD VIc Photometry of M30 Stars (Sandquist+, 1999)
Wide-field CCD photometry of the globular cluster M30.
Sandquist E.L., Bolte M., Langer G.E., Hesser J.E., De Oliveira C.M.
<Astrophys. J., 518, 262-283 (1999)>
=1999ApJ...518..262S 1999ApJ...518..262S
ADC_Keywords: Clusters, globular ; Photometry, CCD ; Photometry, VRI
Keywords: globular clusters: individual (M30) - stars: abundances -
stars: evolution
Description:
The file contains VIc data of the globular cluster M30. All frames were
taken using a 2048x2048 pixel CCD with pixels covering 0.44 arcseconds
on a side, for a total field of approximately 15 arcminutes on a side.
Data were taken on 1994 July 78 at the Cerro Tololo Inter-American
Observatory (CTIO) 4m telescope.
The data were calibrated against Landolt (1983, Cat. II/118)
standard stars.
Objects:
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RA (2000) DE Designation(s)
-----------------------------------------
21 40 22.0 -23 10 45 M30 = NGC 7099
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 68 25279 VIc Photometry for M30 stars
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See also:
J/AJ/116/1757 : M30 UBV photometry (Guhathakurta+, 1998)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 5 I5 --- ID Identification
7- 14 F8.3 pix Xpos X coordinate in pixels (1)
16- 23 F8.3 pix Ypos Y coordinate in pixels (1)
26- 32 F7.4 mag Vmag V magnitude
35- 41 F7.4 mag e_Vmag V magnitude error
44- 50 F7.4 mag V-Ic V-Ic colour
53- 59 F7.4 mag e_V-Ic V-Ic colour error
62- 68 F7.4 --- chi2 Reduced chi2
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Note (1): Pixel coordinates can be roughly transformed to delta RA and
delta DEC positions (in arcseconds relative to the cluster center
defined by Guhathakurta et al. (1998AJ....116.1757G 1998AJ....116.1757G)) using
the following transformations:
delta RA = -321.302 + 0.00106 * Xpos + 0.43704 * Ypos
delta DE = -453.752 + 0.43520 * Xpos - 0.00151 * Ypos
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Acknowledgements: Eric Sandquist
(End) Eric Sandquist [San Diego State University] 29-Jul-2004