Photometric determination of the [Fe/H] ratio for the globular cluster M 92

Abstract

CCD observations of the northern globular cluster M 92 were obtained in the PXYVS colors of the Vilnius photometric system. The results for 230 stars in an area centered on the cluster and for 178 stars in an area west of the cluster down to V = 17.0 mag are presented. After a brief outline of the data pathway from observations to reduction via IRAF and a discussion of the photometric errors, the [Fe/H] ratio of the globular cluster M 92 is determined by multicolor PXYVS Vilnius photometry.

Photometric procedure for quantitative analysis of Aflatoxin B1 in peanuts by thin-layer chromatography using charge coupled device detector

“…29 ImageJ is widely used in medicine 30,31 and IRAF (Image Reduction Astronomical Facility) is practically the universal package for photometric reduction in Astronomy. 32 The simplest way to measure the spots brightness is with the so called diaphragm photometry. In that mode one choose the diaphragm size and form (we adopted circular diaphragms due to the spots symmetry).…”