\documentstyle[twoside]{article}
\input ibvs2.sty
\begin{document}

\IBVShead{5701}{3 May 2006}

\IBVStitle{Times of Maxima for Selected Delta Scuti Stars}

\IBVSauth{Klingenberg, G.$^{1}$; Dvorak, S. W.$^{2}$; Robertson, C. W.$^{3}$}

\IBVSinst{Bossmo Observatory, Mo i Rana, Norway; e-mail: geir.klingenberg@gmail.com}
\IBVSinst{Rolling Hills Observatory, Clermont, FL USA; e-mail: sdvorak@rollinghillsobs.org}
\IBVSinst{SETEC Observatory, Goddard, Kansas USA; e-mail:cwr@pixius.net}

\SIMBADobj{CC And}
\SIMBADobj{GP And}
\SIMBADobj{V356 Aur}
\SIMBADobj{YZ Boo}
\SIMBADobj{BL Cam}
\SIMBADobj{V871 Cas}
\SIMBADobj{DQ Cep}
\SIMBADobj{AD CMi}
\SIMBADobj{XX Cyg}
\SIMBADobj{V2088 Cyg}
\SIMBADobj{V2129 Cyg}
\SIMBADobj{GW Dra}
\SIMBADobj{QS Gem}
\SIMBADobj{V345 Gem}
\SIMBADobj{DY Her}
\SIMBADobj{V830 Her}
\SIMBADobj{V927 Her}
\SIMBADobj{V966 Her}
\SIMBADobj{VX Hya}
\SIMBADobj{AN Lyn}
\SIMBADobj{BE Lyn}
\SIMBADobj{BO Lyn}
\SIMBADobj{CQ Lyn}
\SIMBADobj{SZ Lyn}
\SIMBADobj{TV Lyn}
\SIMBADobj{BP Peg}
\SIMBADobj{DY Peg}
\SIMBADobj{AE UMa}
\SIMBADobj{GG UMa}
\SIMBADobj{HH UMa}
\SIMBADobj{IP UMa}
\SIMBADobj{TU UMi} 

\IBVStyp{ DSCT, SXPHE }
\IBVSkey{CCD photometry} 

\begintext

We are presenting 120 previously unpublished times of maxima for 32 Delta Scuti and
SX Phe stars. The observations where obtained in the period 2002 - 2006, using the 
telescopes and CCD-detectors listed in Tables 1 and 2. CCD-frame calibration and
differential aperture photometry where performed using AIP4WIN software (Berry and 
Burnell, 2005), sextractor and custom-written applications. The times of maxima, 
presented in Table 3, are all heliocentric, and where determined by polynomial
fitting using Peranso software (Vanmunster, 2006).

\vskip 1cm
\small
\begin{center}

{\bf Table 1: Telescopes and Observatories}
\vskip 2mm
\begin{tabular}{llll}
\hline
Telescope type & Aperture & F-ratio & Observatory\\
\hline
Newtonian & 20 cm & f/4 & Bossmo Observatory (BMO)\\
Catadioptric & 25 cm & f/10 & Rolling Hills Observatory (RHO)\\
Catadioptric & 30 cm & f/5 & SETEC Observatory (SEO)\\
\hline
\end{tabular}

\vskip 1cm

{\bf Table 2: Detectors}
\vskip 2mm
\begin{tabular}{lllll}
\hline
CCD type & Chip & FOV & Pixels & Observatory\\
\hline
SBIG ST-7 & Kodak KAF-400    & $19\farcm4 \times 28\farcm8$ & 765 $\times$ 510 & BMO\\
SBIG ST-9XE & Kodak KAF-0261 & $18\farcm5 \times 18\farcm5$ & 512 $\times$ 512 & RHO\\
SBIG ST-8 & Kodak KAF-1603ME & $19\farcm3 \times 29\farcm3$ & 1530 $\times$ 1020 & SEO\\
\hline
\end{tabular}

\vskip 1cm

{\bf Table 3: Times of Maxima}
\vskip 2mm
\begin{tabular}{lcccc}
\hline
Star & HJD & +/- & Filter & Obs\\
\hline
CC And&2452609.67358&0.00010&$V$&SEO\\
&2452609.80426&0.00046&$V$&SEO\\
&2453280.31612&0.00094&$V$&BMO\\
&2453280.43954&0.00108&$V$&BMO\\
GP And&2453680.35518&0.00031&None&BMO\\
V356 Aur&2453708.60049&0.00140&None&BMO\\
\hline
\end{tabular}

\newpage

{\bf Table 3: (cont.)}
\vskip 3mm
\begin{tabular}{lcccc}
\hline
YZ Boo&2452374.70620&0.00121&None&SEO\\
&2452374.81064&0.00102&None&SEO\\
&2452392.71252&0.00024&None&SEO\\
&2452392.81760&0.00033&None&SEO\\
&2452392.91966&0.00074&None&SEO\\
&2452432.68370&0.00053&$V$&SEO\\
&2452432.78942&0.00062&$V$&SEO\\
&2453798.47144&0.00054&None&BMO\\
&2453798.57500&0.00051&None&BMO\\
&2453798.67870&0.00052&None&BMO\\
&2453800.86516&0.00044&$V$&RHO\\
&2453800.96972&0.00015&$V$&RHO\\
BL Cam&2453809.30025&0.00004&None&BMO\\
&2453809.33812&0.00005&None&BMO\\
UY Cam&2453808.42249 &0.00292&None&BMO\\
V871 Cas&2453816.46696&0.00051&None&BMO\\
&2453816.60251&0.00094&None&BMO\\
DQ Cep&2453710.23224&0.00074&None&BMO\\
&2453797.69160&0.00052&None&BMO\\
AD CMi&2453810.62591&0.00030&$V$&RHO\\
XX Cyg&2453169.84064&0.00015&$V$&RHO\\
&2453499.85607&0.00049&$V$&RHO\\
&2453538.69645&0.00045&$V$&RHO\\
&2453626.62920&0.00040&$V$&RHO\\
&2453660.61528&0.00059&$V$&RHO\\
&2453686.50947&0.00056&$V$&RHO\\
&2453695.27639&0.00047&None&BMO\\
&2453695.41071&0.00043&None&BMO\\
V2028 Cyg&2453708.27713&0.00155&None&BMO\\
V2129 Cyg&2453442.33548&0.00027&None&BMO\\
GW Dra&2453713.19876&0.00018&None&BMO\\
&2453713.31692&0.00031&None&BMO\\
QS Gem&2453709.69030&0.00118&$V$&BMO\\
V345 Gem&2453443.36334&0.00170&None&BMO\\
DY Her&2452786.65844&0.00064&$V$&RHO\\
&2453054.93914&0.00015&$V$&RHO\\
&2453132.67363&0.00005&$V$&RHO\\
&2453489.83381&0.00018&$V$&RHO\\
&2453535.61256&0.00039&$V$&RHO\\
V830 Her&2453817.57388&0.00092&None&BMO\\
V927 Her&2453803.51891&0.00095&None&BMO\\
&2453803.66209&0.00099&None&BMO\\
&2453804.56891&0.00020&None&BMO\\
V966 Her&2453807.54554&0.00031&None&BMO\\
VX Hya&2452735.60669&0.00069&$V$&RHO\\
&2453016.91220&0.00042&$V$&RHO\\
&2453113.63636&0.00022&$V$&RHO\\
&2453467.69577&0.00106&$V$&RHO\\
&2453476.59757&0.00151&$V$&RHO\\
AN Lyn&2453796.32690&0.00072&None&BMO\\
&2453802.61728&0.00084&$V$&RHO\\
&2453802.71466&0.00067&$V$&RHO\\
BE Lyn&2453416.27845&0.00047&None&BMO\\
&2453416.37521&0.00046&None&BMO\\
&2453443.60274&0.00040&None&BMO\\
&2453798.31817&0.00024&None&BMO\\
BO Lyn&2453795.53561&0.00044&None&BMO\\
&2453795.63339&0.00037&None&BMO\\
CQ Lyn&2453709.38329&0.00069&$V$&BMO\\
&2453709.49681&0.00076&$V$&BMO\\
\hline
\end{tabular}

\newpage

{\bf Table 3: (cont.)}
\vskip 3mm
\begin{tabular}{lcccc}
\hline
SZ Lyn&2452321.73578&0.00063&None&SEO\\
&2452343.79563&0.00042&None&SEO\\
&2452623.55155&0.00058&$V$&SEO\\
&2452623.67342&0.00035&$V$&SEO\\
&2452640.54936&0.00035&$V$&SEO\\
&2452640.66976&0.00056&$V$&SEO\\
&2452643.44217&0.00118&$V$&SEO\\
&2452643.56365&0.00062&$V$&SEO\\
&2452643.68337&0.00081&$V$&SEO\\
&2452647.42013&0.00047&$V$&SEO\\
&2452647.54057&0.00051&$V$&SEO\\
&2452647.65949&0.00023&$V$&SEO\\
&2452648.50325&0.00056&$V$&SEO\\
&2452648.62321&0.00082&$V$&SEO\\
&2452658.63939&0.00036&$V$&RHO\\
&2453064.72252&0.00024&$V$&RHO\\
&2453338.81318&0.00097&$V$&RHO\\
&2453395.58528&0.00022&$V$&RHO\\
&2453416.55775&0.00050&$V$&BMO\\
&2453745.73923&0.00064&$V$&RHO\\
&2453758.76187&0.00016&$V$&SEO\\
&2453758.88451&0.00035&$V$&SEO\\
&2453759.60604&0.00007&$V$&SEO\\
&2453759.72692&0.00002&$V$&SEO\\
&2453759.84713&0.00061&$V$&SEO\\
&2453759.96792&0.00027&$V$&SEO\\
&2453798.41955&0.00049&None&BMO\\
TV Lyn&2453806.53233&0.00062&None&BMO\\
BP Peg&2453709.23216&0.00025&None&BMO\\
DY Peg&2452518.74991&0.00053&None&SEO\\
&2452518.82371&0.00043&None&SEO\\
&2452522.75997&0.00061&None&SEO\\
&2452522.83366&0.00071&None&SEO\\
&2452522.90871&0.00058&None&SEO\\
&2452524.73135&0.00078&None&SEO\\
&2452524.80295&0.00022&None&SEO\\
&2452524.87576&0.00043&None&SEO\\
&2452524.94893&0.00039&None&SEO\\
&2453295.21602&0.00015&$V$&BMO\\
&2453295.28932&0.00014&$V$&BMO\\
AE UMa&2453409.52857&0.00024&None&BMO\\
&2453409.61085&0.00032&None&BMO\\
&2453409.69405&0.00058&None&BMO\\
&2453794.36194&0.00029&None&BMO\\
&2453795.31152&0.00031&None&BMO\\
&2453795.39982&0.00013&None&BMO\\
&2453827.65701&0.00130&$V$&RHO\\
GG UMa&2453711.29412&0.00064&$V$&BMO\\
HH UMa&2453801.92005&0.00193&$V$&RHO\\
IP UMa&2453712.50592&0.00041&$V$&BMO\\
&2453712.60750&0.00074&$V$&BMO\\
&2453797.34943&0.00061&None&BMO\\
&2453797.45183&0.00082&None&BMO\\
TU UMi&2453713.50846&0.00045&$V$&BMO\\

\hline
\end{tabular}
\end{center}

\newpage
\large

{\bf Remarks:}\\
Many Delta Scuti stars have multiple periods, and in these cases $O - C$ 
values might show some scatter due to the beating of the periods.
Still, averaged $O - C$ values are useful when looking for long term
trends (Fauvud et al., 2006) or sudden period changes (Breger et
al., 1998), if analyzed with care.

\vskip 1cm

{\bf Acknowledgements:}\\
This work has made use of the SIMBAD database, operated at CDS, Strasbourg, France.

\reference

Berry, R., Burnell, J., 2005, Handbook of Astronomical Image Processing,
Willmann-Bell {\tt http://www.willbell.com/aip/index.htm}

Breger, M., Pamyatnykh, A. A., 1998, {\it A\&A}, {\bf 332}, 958
%%\BIBCODE{1998A&A..332.958}.

Fauvaud, S., Rodr{\'\i}guez, E., Zhou, A.Y. et al., 2006, ``A comprehensive study of the SX Phe star BL Cam'', accepted for publication in {\it A\&A}

Vanmunster, T., 2006, {\tt http://www.peranso.com}

\endreferences

\vfill

%From: IBVS 5739
\IBVSerratum{5701}

The star listed as V2028 Cyg in IBVS 5701 should be V2088 Cyg.

\bigskip

Geir Klingenberg


\end{document}
