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J/AJ/116/2415       CCD UBVRI Photometry of M80                 (Alcaino+ 1998)

Multicolor CCD photometry of the poorly studied globular cluster M80. Alcaino G., Liller W., Alvarado F., Kravtsov V., Ipatov A., Samus N., Smirnov O. <Astron. J. 116, 2415 (1998)> =1998AJ....116.2415A
ADC_Keywords: Photometry, UBVRI ; Photometry, CCD ; Clusters, globular Description: The table photom.dat contains the first multicolour (UVBRI) CCD photometry of 4899 stars in a 4'x7' field of the poorly studied globular cluster M80. The observations were acquired on 1994 June 13-16 using the 2.5m telescope of the Las Campanas Observatory, with a 2x1024x1024 pixel CCD. Two observing 4'x4' fields were observed, the first one at the cluster center, and the second one centered at approximately 3' to the East of the cluster center. The limiting magnitude was deeper in the the second frame by approximately DV=2.5mag. The exposures were 8 to 500s, with a total of 7 frames in U, 17 frames in B, 20 frames in V, and 18 frames in I. Objects: --------------------------------------------------- RA (2000) DE Designation(s) --------------------------------------------------- 16 17 02.4 -22 58 30 M 80 = NGC 6093 = C 1614-228 --------------------------------------------------- File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file photom.dat 50 4899 UBVRI in M80
Byte-by-byte Description of file: photom.dat
Bytes Format Units Label Explanations
2- 5 I4 --- Seq [1-6443] Running number 7- 14 F8.3 pix xpos Coordinate (along DEC, increases to the south) 16- 23 F8.3 pix ypos Coordinate (along RA, increases to the east) 25- 30 F6.3 mag Vmag V magnitude 32- 37 F6.3 mag U-B ? U-B color 39- 43 F5.3 mag B-V ? B-V color 45- 50 F6.3 mag V-I V-I color
Acknowledgements: It is a pleasure to thank Nikolai N. Samus who kindly supplied the data files to CDS.
(End) Francois Ochsenbein [CDS] 20-Jan-1999
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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