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J/A+A/319/850       V, I , and Gunn z imaging of Terzan 4       (Ortolani+ 1997)

High quality seeing V, I, and Gunn z imaging of Terzan 4: a blue horizontal branch bulge globular cluster Ortolani S., Barbuy B., Bica E. <Astron. Astrophys. 319, 850 (1997)> =1997A&A...319..850O (SIMBAD/NED BibCode)
ADC_Keywords: Clusters, globular ; Photometry Keywords: globular clusters: individual: Terzan 4, M 30; general - HR diagram - Galaxy: center Abstract: We study the globular cluster Terzan 4 projected close to the Galactic center, by means of V, I and Gunn z Colour-Magnitude Diagrams. The images were obtained under exceptional seeing conditions (0.35"-0.55") at the ESO New Technology Telescope equipped with SUSI. We derive a reddening of E(B-V)=2.35 and a distance from the Sun d=8.3kpc for Terzan 4. From the similarity of the VI Colour-Magnitude Diagrams of Terzan 4 and M30, in particular the presence of a blue horizontal branch, it could be as metal-poor as [Fe/H]≃-2.0. It is therefore another blue horizontal branch globular cluster located close to the Galactic center. Objects: ------------------------------------------- RA (2000) DE Designation(s) ------------------------------------------- 17 30 38 -31 35.8 Terzan 4 = C 1727-315 ------------------------------------------- File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file ter4iz 36 10280 I, Gunn z photometry of Terzan 4 ter4vi 36 2078 V, I photometry of Terzan 4
Byte-by-byte Description of file: ter4vi
Bytes Format Units Label Explanations
1- 5 I5 --- Seq Sequence number 7- 13 F7.2 pix Xpos x pixel coordinate in Fig. 1 15- 21 F7.2 pix Ypos y pixel coordinate in Fig. 1 23- 28 F6.3 mag Vmag ? V magnitude 30- 36 F7.3 mag V-I ? V-I color index
Byte-by-byte Description of file: ter4iz
Bytes Format Units Label Explanations
1- 5 I5 --- Seq Sequence number 7- 13 F7.2 pix Xpos x pixel coordinate in Fig. 1 15- 21 F7.2 pix Ypos y pixel coordinate in Fig. 1 23- 28 F6.3 mag Imag ? I magnitude 30- 36 F7.3 mag I-z ? I-z color index
Acknowledgements: Beatriz Barbuy
(End) Patricia Bauer [CDS] 25-Sep-1996
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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