\documentstyle[twoside,epsf]{article}

\input ibvs2.sty
\input ibvst.sty

\begin{document}

\IBVShead{4708}{17 May 1999}

\IBVStitletl{BV Photometry of SX P\lowercase{he} Blue Stragglers }{ in the Globular Cluster NGC~5466}

\IBVSauth{Jennwood Chen, T. Michael Corwin }

\IBVSinsto{UNC Charlotte, Charlotte, NC 28223, USA [e-mail: mcorwin@uncc.edu] }

\begintext

\IBVSTnam{Blue stragglers NH 27, NH 29, NH 35, NH 38, NH 39, NH 49 in the 
globular cluster NGC 5466.  }

\IBVSTcoo{14\hr 03\fmm 2}{+28\deg 46\arcm}{1950
}

\IBVSTobs{The images were obtained with the No.\,1 0.9-meter telescope at 
Kitt Peak National Observatory.
}

\IBVSTdet{The $800 \times 800$ TI\#2 CCD with a pixel scale of 0.43 arcsec 
(1991) and the $2048 \times 2048$ T2KA CCD with a pixel scale of 0.69 
arcsec (1992, 1993, 1995, 1997).
}

\IBVSTfil{The Harris $B$ and $V$ filters were used, with exposure times
of 300~s for the $V$ frames and 500~s for the $B$ frames.}

\IBVSTcomp{Four stars in the field were selected as local magnitude 
standards for relative photometry (185, 272, 276, and 281 Buonanno et al.\ 
1984).
}

\IBVSTsys{$UBV$
}{Twenty-nine standard stars select\-ed from Landolt (1983) with a range in 
$(B-V)$ from $-0.186$ to +2.527 mag were observed.
}

\IBVSTdata{Through IBVS Web-site as 4708-t1.txt, 4708-t2.txt, 4708-t3.txt, 4708-t4.txt,\\ 4708-t5.txt, and 4708-t6.txt.
}

\IBVSTtyp{ SX Phe
}

\IBVSTrem{We present a new photometric study of the six SX Phe blue 
stragglers in NGC 5466 discussed by Nemec et al.\ (1994). The images used 
in this study were obtained during May 1991, May 1992, April 1993, June 
1995, and June 1997. The raw data frames were processed and reduced 
following standard procedures using ALLSTAR in DAOPHOTX in IRAF. The 
resulting ephemerides for maxima are: NH 27: 0.050697 day, epoch 2448383.934 $\pm$ 0.005 days; NH 29: 0.040295 day, epoch 2450618.753 $\pm$ 0.005 day; NH 35: 0.049848 day, epoch 2448383.921 $\pm$ 0.002 days; NH 38: 0.055078 day, epoch 2448383.760 $\pm$ 0.005 day; NH 39: 0.050480 day, epoch 2448382.686 $\pm$ 0.002 day; and NH 49: 0.045070 day, epoch 2448383.668 $\pm$ 0.005 day.\\
The light curves are for the $B$ data. The filled squares are 1991 data, open squares are 1992 data, filled triangles are 1993 data, open triangles are 1995 data, and filled circles are 1997 data. The finding chart is published in Nemec and Harris (1987).
}


\IBVS2fig{7.5cm}{4708-f1.ps}{}{4708-f2.ps}{}

\newpage

\IBVS2fig{7.5cm}{4708-f3.ps}{}{4708-f4.ps}{}

\IBVS2fig{7.5cm}{4708-f5.ps}{}{4708-f6.ps}{}



\references

Buonanno, R., Buscema, G., Corsi, C., Iannicola, G., and Fusi Pecci, F. 
1984, {\it A\&AS\/}, {\bf 56}, 79

Landolt, A. 1983, {\it AJ\/}, {\bf 88}, 439

Nemec, J., Nemec, A., and Lutz, T. 1994, {\it AJ\/}, {\bf 108}, 222

Nemec, J. and Harris, H. 1987, {\it ApJ\/}, {\bf 316}, 172

\endreferences


\IBVSedata{4708-t1.txt}
\IBVSedata{4708-t2.txt}
\IBVSedata{4708-t3.txt}
\IBVSedata{4708-t4.txt}
\IBVSedata{4708-t5.txt}
\IBVSedata{4708-t6.txt}

\end{document}

