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 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:
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RA (2000) DE Designation(s)
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16 17 02.4 -22 58 30 M 80 = NGC 6093 = C 1614-228
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
photom.dat 50 4899 UBVRI in M80
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Byte-by-byte Description of file: photom.dat
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Bytes Format Units Label Explanations
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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
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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