WIYN Tip-Tilt Module Observations of the Old Open Cluster NGC 1193

Details WIYN Tip-Tilt Module Observations of the Old Open Cluster NGC 1193 WIYN Tip-Tilt Module Observations of the Old Open Cluster NGC 1193

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aas...20916502s&link_type=abstract

2007 AAS/AAPT Joint Meeting, American Astronomical Society Meeting 209, #165.02; Bulletin of the American Astronomical Society,

Astronomy and Astrophysics

Astronomy

Scientific paper

We present the analysis of new photometric data in the BVI system of the old Galactic open cluster NGC 1193 obtained at the WIYN 3.5 m on Kitt Peak with the WIYN Tip-Tilt Module. CCD image reductions were performed using IRAF's CCDRED package and final photometry was obtained with IRAF's DAOPHOT package. Our preliminary results from the analysis of five color-magnitude diagrams with the 2004 Yonsei-Yale isochrones give an age estimate of 5 Gyr for NGC 1193 which is 3 Gyr younger than the original estimate of Kaluzny in 1988 and the reanalysis of the same data by Tadross in 2004. Although our metallicity estimate for NGC 1193 is [Fe/H]=-0.30 is in agreement with those of Kaluzny and Tadross, we find that the cluster has a significantly higher apparent distance modulus in V of (m-M)_V = 14.12 mag due to our larger reddening estimate of E(B-V)=0.20 mag which is in agreement with the E(B-V)=0.21 mag estimate of Schlegel, Finkbeiner, and Davis that was based on their analysis of infrared dust maps. We discuss the impact this new analysis of NGC 1193 has on our understanding of Galactic open clusters.
Myra Stone's research was supported by the NOAO/KPNO Research Experiences for Undergraduates (REU) Program which is funded by the National Science Foundation through Scientific Program Order No. 3 (AST-0243875) of the Cooperative Agreement No. AST-0132798 between the Association of Universities for Research in Astronomy (AURA) and the NSF.

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