PAL 13 SHARSIMON YULDUZ TO‘DASINING FOTOMETRIK TADQIQOTI
This article is devoted to the multi-color photometric analysis of the globular cluster Palomar 13 based on observational data
obtained at the Maidanak Observatory. The object was observed during a three-day autumn campaign using four wide-band filters
(B, R, V, I) with seven distinct exposure times. To process the Pal 13 images, PSF (Point Spread Function) and aperture photometry
methods were implemented using the IRAF software package. Taking advantage of the superior astronomical climate at the
Maidanak Observatory, precise stellar magnitudes in the V, R, and I bands and spatial coordinates were determined, despite the
cluster's low surface brightness. The resulting color-magnitude relationships provided key insights into the photometric structure
of Pal 13. These findings are of significant importance for refining evolutionary models of the Galactic halo formation.
1. Ortolani S., Rosino L., Sandage A., 1985, AJ, 90, 473
2. Borissova J., Markov H., Spassova N., 1997, AASS, 121, 499
3. Bradford J.D., Geha M. et al., 2011, 743, 167
4. A. D. Mackey and Sidney van den Bergh “The properties of Galactic globular cluster subsystems Astron. Soc. 360, 631–645
(2005)”, pp.1-5
5. Borissova, H. Markov, and N. Spassova “CCD photometry of the globular cluster Palomar 13” Astron. Astrophys. Suppl.
Ser. 121, 499-505 (1997), pp.1-7
6. Kathleen Grabowski va boshqalar “Absolute Magnitudes of Turnoff Stars in Globular Clusters Palomar 13 and Whiting 1”,
Journal of Undergraduate Research in Physics, March 2013, MSI2024OBR, pp.1-6
7. L.Lee Clark and Eric L. “ The blue straggler and main-sequence binary population of the low-mass globular cluster Palomar
13”, The Astrophysical Journal, Printed in the U.S.A., 2004 September, 128.3019-3033, pp.1-3
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