STELLAR PHOTOMETRY INCLUDING SATURATED IMAGES - RESULTS ON M67 WITH WFPC2

被引：26

作者：

GILLILAND, RL

机构：

[1] Space Telescope Science Institute, Baltimore, MD 21218

来源：

ASTROPHYSICAL JOURNAL | 1994年 / 435卷 / 01期

关键词：

BINARIES; VISUAL; METHODS; DATA ANALYSIS; OPEN CLUSTERS AND ASSOCIATIONS; INDIVIDUAL; (M67); TECHNIQUES; PHOTOMETRIC;

D O I：

10.1086/187595

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The Wide Field and Planetary Camera 2 (WFPC2) on HST is providing unsurpassed imaging capabilities and supporting accurate stellar photometry over large fields of view at high angular resolution. I discuss a feature of the WFPC2 CCD systems that nominally limits the dynamic range attainable with single exposures: a 12 bit analog to digital converter that does not allow sampling of the CCD full-well depth even at the low gain (14e-/DN) setting. I demonstrate that accurate stellar photometry can be performed on stellar images that are strongly saturated. Two 40 s exposures in V and I bands on the old open cluster M67 are analyzed to demonstrate photometric capabilities with a dynamic range of over 12 mag from single exposures. New photometric results for both bright and faint objects in M67 are derived from the WFPC2 data.

引用

页码：L63 / &

共 8 条

[1]

BURROWS CJ, 1994, WFPC2 INSTRUMENT HDB

[2] NEW PHOTOELECTRIC OBSERVATIONS OF STARS IN OLD GALACTIC CLUSTER M67 [J].