Publications (6)
The Determination Of Reddening From Intrinsic VR Colors Of RR Lyrae Stars
Andrea Kunder, Brian Chaboyer, Andrew Layden
New R-band observations of 21 local field RR Lyrae variable stars are used to explore the reliability of minimum light (V-R) colors as a tool for measuring interstellar reddening.…
Long Period Variable Stars in the Globular Cluster M5
Michael Wehrung, Andrew Layden
We report results of VI time series photometry for the bright globular cluster M5 taken between 2007-2011 using the 0.5-m telescope at Bowling Green State Univ. and the PROMPT #4 t…
Colors of c-type RR Lyrae Stars and Interstellar Reddening
Andrew Layden, Tyler Anderson, Paul Husband
RR Lyrae stars pulsating in the fundamental mode have long been used to measure interstellar reddening, based on their observed uniformity of color at minimum light after sma…
Variable Stars in Metal-Rich Globular Clusters. IV. Long Period Variables in NGC 6496
Mohamad Abbas, Andrew Layden, Katherine Guldenschuh +6
We present VI-band photometry for stars in the metal-rich globular cluster NGC 6496. Our time-series data were cadenced to search for long period variables (LPVs) over a span of ne…
The RR Lyrae variables and Horizontal Branch of NGC6656 (M22)
Andrea Kunder, Peter B. Stetson, Santi Cassisi +10
The first calibrated broadband UBVI time-series photometry is presented for the RR Lyrae variable stars in NGC6656 (M22), with observations spanning a range of twenty-two years. We…
CCD Photometry of the Globular Cluster NGC 4833 and Extinction Near the Galactic Plane
Jason Melbourne, Ata Sarajedini, Andrew Layden +1
We present CCD photometry for the Galactic globular cluster NGC 4833. Our BVI color magnitude diagrams (CMD) extend from above the red giant branch (RGB) tip to several magnitudes…