Setting Up of the Strömvil System Standards and Standard Regions

AbstractCCD photometry of standard areas of the seven-color Strömvil photometric system in some open and globular clusters is described. The primary standards are being measured with a two-channel photoelectric photometer on the 1.5 meter telescope on Mt. Lemmon. CCD photometry of standard areas is in progress with the Vatican Advanced Technology Telescope on Mt. Graham and with the CASLEO 2.1 m telescope in Argentina. Two additional Strömvil projects are described.

Download Full-text

Precision CCD Photometry of the Horizontal Branch

Symposium - International Astronomical Union ◽

10.1017/s0074180900056801 ◽

1995 ◽

Vol 167 ◽

pp. 361-362

Author(s):

A. G. Davis Philip

Keyword(s):

Globular Clusters ◽

Photometric System ◽

Horizontal Branch ◽

Ccd Photometry ◽

Horizontal Branch Stars ◽

Color System

The Strömgren four-color system is well suited to the measure and analysis of horizontal-branch stars. The increased accuracy of the CCD photometric system and the ability to measure fainter stars in very crowded regions make the combination of the CCD system and four-color photometry an excellent one to study horizontal-branch stars in globular clusters.

Download Full-text

CCD-photometry of galactic globular clusters - III. NGC 6171

Monthly Notices of the Royal Astronomical Society ◽

10.1093/mnras/252.3.357 ◽

1991 ◽

Vol 252 (3) ◽

pp. 357-377 ◽

Cited By ~ 30

Author(s):

F. R. Ferraro ◽

G. Clementini ◽

F. Fusi Pecci ◽

R. Buonanno

Keyword(s):

Globular Clusters ◽

Ccd Photometry ◽

Galactic Globular Clusters

Download Full-text

The Integrated Photometry of Globular Clusters in the Vilnius Photometric System

Star Clusters ◽

10.1007/978-94-009-9007-4_87 ◽

1980 ◽

pp. 483-484

Author(s):

K. Zdanavičius ◽

V. Straižys

Keyword(s):

Globular Clusters ◽

Photometric System

Download Full-text

Globular Clusters in the Vilnius Photometric System

The Harlow-Shapley Symposium on Globular Cluster Systems in Galaxies ◽

10.1007/978-94-015-1104-9_87 ◽

1988 ◽

pp. 515-516

Author(s):

K. Zdanavičius

Keyword(s):

Globular Clusters ◽

Photometric System

Download Full-text

CCD Observations of Variable Stars in Globular Clusters

International Astronomical Union Colloquium ◽

10.1017/s0252921100011933 ◽

1989 ◽

Vol 111 ◽

pp. 285-285

Author(s):

H.A. Smith ◽

J.R. Kuhn ◽

J. Curtis

Keyword(s):

Globular Cluster ◽

Globular Clusters ◽

Variable Stars ◽

Michigan State University ◽

State University ◽

Ccd Photometry ◽

Rr Lyrae ◽

Short Period ◽

Ccd Observations ◽

Period Variable

AbstractBVR observations of the relatively metal-rich globular cluster NGC 6388 have been obtained with a CCD on the CTIO 0.9 m telescope. Eighteen possible short period variable stars have been discovered in or near the cluster. At least 10 of these are probable RR Lyrae members of NGC 6388. We confirm the finding of Hazen and Hesser that this cluster is one of the most metal-rich to contain a significant number of RR Lyraes. A program of CCD photometry of field and cluster variable stars has been initiated on the 0.6m telescope of the Michigan State University Observatory.

Download Full-text

Double-radial-mode SX Phoenicis stars in the globular clusters NGC 5466 and M71

International Astronomical Union Colloquium ◽

10.1017/s0252921100010551 ◽

2004 ◽

Vol 193 ◽

pp. 166-170

Author(s):

Young-Beom Jeon ◽

Myung Gyoon Lee ◽

Seung-Lee Kim ◽

Ho Lee

Keyword(s):

Time Series ◽

Globular Cluster ◽

Fundamental Mode ◽

Globular Clusters ◽

Radial Mode ◽

Ccd Photometry ◽

Period Ratio

AbstractThrough time-series CCD photometry of the globular cluster NGC 5466, we found three double-radial-mode SX Phe stars, all of which are consistent with the theoretical period ratio of the first overtone mode to the fundamental mode (P1H/PF); their period ratios are 0.7825, 0.7826 and 0.7919, respectively. We also detected a double-radial-mode SX Phe star in M71. Its period ratio is 0.781, which is also consistent with the theoretical value.

Download Full-text