J/A+AS/121/499 BV and rg photometry of Pal 13 (Borissova+ 1997)
CCD photometry of the globular cluster Palomar 13
Borissova J., Markov H., Spassova N.
<Astron. Astrophys. Suppl. Ser. 121, 499 (1997)>
=1997A&AS..121..499B 1997A&AS..121..499B (SIMBAD/NED BibCode)
ADC_Keywords: Photometry, CCD ; Clusters, globular
Keywords: globular clusters: individual: Palomar 13 - Hertzprung-Russel diagram
Abstract:
A new CCD photometry of the halo cluster Palomar 13 is used to
construct a color-magnitude diagram in the Thuan-Gunn and the B, V
photometric systems. The color-magnitude diagram of the cluster shows
as already noted by Ortolani et al. (1985AJ.....90..473O 1985AJ.....90..473O) an extremely
poor red horizontal branch and a very sparsely populated giant branch.
Seven BSS candidates are identified in the field of Palomar 13. The
age of the cluster determined by fitting with the isochrones of
Proffitt & Vanden Berg (1991ApJS...77..473P 1991ApJS...77..473P) and Bergbusch & Vanden
Berg (1992ApJS...81..163B 1992ApJS...81..163B) and by a differential comparison of the
color-magnitude diagram with that of Pal 5 is 12±2Gyr.
Objects:
-------------------------------------------
RA (2000) DE Designation(s)
-------------------------------------------
23 06.5 +12 44 Pal 13 = C 2304+124
-------------------------------------------
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table6 35 80 B,V photometry of Pal 13
table7 36 175 g,r photometry of Pal 13
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table6
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 2 I2 --- ID Identification number
7- 11 F5.1 pix Xpos X position (1 pix = 0.30 arcsec)
15- 19 F5.1 pix Ypos Y position (1 pix = 0.34 arcsec)
24- 28 F5.2 mag Vmag V magnitude
32- 35 F4.2 mag B-V B-V color index
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table7
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
2- 4 I3 --- ID Identification number
8- 13 F6.2 pix Xpos X position (1 pix = 0.30 arcsec)
16- 21 F6.2 pix Ypos Y position (1 pix = 0.34 arcsec)
25- 29 F5.2 mag gmag g magnitude
32- 36 F5.2 mag g-r g-r color index
--------------------------------------------------------------------------------
Acknowledgements: J. Borissova
(End) Patricia Bauer [CDS] 28-Jun-1996