\documentstyle[twoside,epsf,hyperref,longtable]{article}
\input ibvs2.sty
\input ibvse.sty


\begin{document}
\IBVSheadDOI{63}{6220}{27 October 2017}

\IBVStitletl{OAN-TNT Results of Observations - Photoelectric}{ Maxima of Pulsating Stars}


\IBVSauth{Pe\~na, J. H.$^{1,2,3}$; Renteria, A.$^{1,2}$; Pi\~na, D. S.$^{1,2}$; Villarreal, C.$^{1,2}$; Calderon,  J.$^{1,2}$; Pani, A.$^3$; Huepa, H.$^3$; students from the Latin American School of Observational Astronomy (ESAOBELA) 16 and 17 as well as the students from the Advanced Observational Courses (AOA) 15, and 16 at Facultad de Ciencias, UNAM and students of the workshop in Observational Astronomy (TAO)}

\IBVSinst{Instituto de Astronom\'ia, Apartado Postal 70-264, M\'exico D.F. 04510, M\'exico, 
jhpena@astro.unam.mx} %email
\IBVSinst{Facultad de Ciencias, Universidad Nacional Aut\'onoma de M\'exico, M\'exico D.F., M\'exico.}
\IBVSinst{Observatorio Astron\'omico Nacional, Tonantzintla, M\'exico.}



\begintext

In this second compilation of OAN-TNT results, photoelectric and CCD
observations of 10 variable stars obtained from 2016 to January
2017, are presented giving 72 maxima of pulsating stars. The
observations were made at both the Observatorio Astron\'omico
Nacional at Tonantzintla (TNT) and San Pedro M\'artir (SPM), both
belonging to Universidad Nacional Aut\'onoma de M\'exico (UNAM). The
CCD reduction was done with AstroImageJ (Collins \& Kielkopf 2012) and the
photoelectric observations were reduced using a classical procedure
(see Pe\~na et al., 2016 for details). All times of maxima are
heliocentric and were determined with a fifth grade polynomial
fitting to the light curve. The epoch values and period to determine
the O-C were taken from GCVS (Samus et al., 2017) and are given
in days. The star BO Lyn was not listed in this source so its values
were taken from Pe\~na et al. (2016). The values in column O-C are
determined without incorporation of nonlinear terms. The errors were
determined from the RMS error of the residuals evaluated for the
times of maxima and are about 0.016 day. The accuracy of each point
is given by the exposure time and varies between 3 min for the
1-meter telescope and 1 min for the smaller telescopes. It may seem
contradictory to give a longer integration time to the larger
aperture telescope. However, this is done since the mounting of the
smaller telescopes is of an altazimuth type, which does not allow
long integration times. For the 1-meter telescope there were around
40,000 counts, and for the 10-inch telescope there were 11,000
counts, enough to secure high precision. The photoelectric
measurements and all the light curves can be requested for
inspection.


In Table 1, the stellar coordinates refer to epoch 2000 and the V values
are given in magnitudes. All information about telescopes,
photometers and filters is specified in the Table remarks. In Table
2 the following quantities are listed: Column 1 is the ID, column 2
the time in HJD, in column 3, N gives the number of data points in
each run, column 4 $\Delta t$ is the time span in days of the run,
column 5 the telescope, column 6 the filter used, column 7 detector,
column 8 the O-C value, and finally column 9 gives the observers and
reducers. Observers and reducers are specified in the remarks at the end of the
Table.

\newpage

\begin{center}
\small
\begin{longtable}{lcccccll}
\caption{Characteristics of the observed stars} \\
\hline
Star    &   RA (2000)   &DEC (2000)   &V (mag)    &  SpTyp  &T$_0$ (d)     &\multicolumn{1}{c}{P (d)}        &Observatory         \\
\hline
\endfirsthead
\multicolumn{8}{c}
{{\tablename\ \thetable{}: cont.}} \\
\hline
Star    &   RA (2000)   &DEC (2000)   &V (mag)    &  SpTyp  &T$_0$ (d)     &\multicolumn{1}{c}{P (d)}        &Observatory         \\
\hline
\endhead
\hline
\endfoot
\hline
\endlastfoot
GP And  &   00 55 18 &  $+$23 09 49.36 & 10.79 &  A3     & 2433861.438   &  0.07868270  & TNT \& SPM  \\
RV Ari  &   02 15 07 &  $+$18 04 27.90 & 11.61 &  A      & 2435017.5124  &  0.093128264 & TNT \\
V367 Cam&   04 40 55 &  $+$53 38 06.45 & 10.80 &  F3VI   &               &              & TNT \\
AD CMi  &   07 52 47 &  $+$01 35 50.50 &  9.38 &  F3III  & 2442429.458   &  0.12297443  & TNT \& SPM     \\
RR Gem  &   07 21 33 &  $+$30 52 59.46 & 11.92 &  A8     & 2441357.205   &  0.03973106  & TNT \\
KZ Hya  &   10 50 54 &  $-$25 21 14.00 & 10.06 &  B9III  & 2442516.158   &  0.059510421 & TNT \& SPM \\
EH Lib  &   14 58 55 &  $-$00 56 53.05 &  9.38 &  F0     & 2433438.608   &  0.088413245 & TNT  \\
SZ Lyn  &   08 09 35 &  $+$44 28 17.61 &  9.43 &  F2     & 2438124.398   &  0.120534920 & TNT   \\
BO Lyn  &   08 43 01 &  $+$40 59 51.78 & 11.49 &  A5-A8  & 2457412.8196  &  0.093357995 & TNT \& SPM  \\
AE UMa  &   09 36 53 &  $+$44 04 00.39 & 11.35 &  A9     & 2435604.338   &  0.086017055 & TNT    \\
\end{longtable}
\end{center}



\begin{center}
\small
\begin{longtable}{lcrcccccl}
\caption{Times of maxima of pulsating stars} \\
\hline
ID  &     HJD$-$2450000&   N&      $\Delta$t (d)&      Telescope&      Fil&         Detector&       O$-$C &    Observers/Reducers    \\
\hline
\endfirsthead
\multicolumn{9}{c}
{{\tablename\ \thetable{}: cont.}} \\
\hline
ID  &     HJD$-$2450000&  N &      $\Delta$t (d)&      Telescope&      Fil&         Detector&       O$-$C &    Observers/Reducers    \\
\hline
\endhead
\hline
\endfoot
\hline
\endlastfoot
GP And& 7713.7160 & 145 & 0.2074 & 1M & V & 1001 &0.0070  & DSP/DSP \\
& 7713.7949 &  &  &  &  &  & 0.0072 &  \\
& 7731.2073 & 35 & 0.072 & 84 & y & phot & 0.0307 & DSP/DSP \\
& 7731.7343 & 31 & 0.0701 & 1M & G & 8300 &0.0069  & TAO/CVR \\
& 7732.6793 & 59 & 0.1096 & 1M & G & 8300 &0.0077 & TAO/CVR \\
RV Ari& 7732.7919 & 100 & 0.1059 & m1 &V  &1001 & & TAO/JHP,ARL\\
& 7733.8260 & 116 & 0.1290 & m1 &V &1001 & & TAO/JHP,ARL\\
& 7736.7160 & 160 & 0.1519 & m1 &V &1001 & & TAO/JHP,ARL\\
& 7736.8068 & & & & & & & \\
V367 Cam& 7732.7775 &185 &0.165 & m2 &G &ST8 & & TAO/JCC \\
&7768.7170 &155 &0.1355 & m2 &V &1001 & & TAO/JCC \\
&7776.7329 &170 &0.176 & 1M &V &1001 & & ESAOBELA17/JCC \\
&7776.8535 & & & & & & &  \\
&7772.7204 &169 &0.136 & m1 &V &1001 & & ESAOBELA17/JCC \\
&7773.7927 &61 &0.0839 & m1 &V &1001 & & ESAOBELA17/JCC \\
&7767.7426 &164 &0.1695 & me &V &1001 & & ESAOBELA17/ARL,JCC \\
&7768.8225 &115 &0.09132 & me &V &1001 & & ESAOBELA17/ARL,JCC \\
AD CMi& 7400.8690 & 48 & 0.01 & 84 & y & phot & $-$0.0002 & AAS,JGT/JHP\\
& 7409.8501 & 179 & 0.14 & m2 & V & 1001 &0.0037  & ESAOBELA16/DSP \\
& 7430.7541 & 130 & 0.13 & m2 & V & 1001 &0.0020 & ESAOBELA16/DSP \\
RR Gem& 7772.6941 & 182 & 0.2460 & m2 &G &ST8 &$-$0.1929 & ESAOBELA17/JHP\\
& 7777.8590 & 53 & 0.0640 & m2 &G &ST8 &$-$0.1931 & ESAOBELA17/JHP\\
KZ Hya& 7399.9693 & 41 & 0.08 & 84 & y & phot & 0.0166 & ASS,JGT/DSP\\
& 7411.8755 & 87 & 0.09 & m1 & G & ST8 &0.0207 & ESAOBELA16/DSP\\
& 7412.8265 & 113 & 0.07 & m2 & V & 1001 &0.0195 & ESAOBELA16/DSP\\
& 7459.8400 & 82 & 0.10 & m2 & V & 1001 & 0.0198 & AOA16/DSP\\
& 7459.8989 & & & & & & 0.0192 & \\
& 7460.7921 & 52 & 0.06 & m2 & V & 1001 & 0.0197 & AOA16/DSP\\
& 7470.7894 & 154 & 0.13 & m1 & V & 1001 & 0.0193 & DSP/DSP\\
& 7470.8491 & & & & & &0.0194 & \\
& 7471.7419 & 192 & 0.17 & m1 & V & 1001 & 0.0196 & DSP/DSP\\
& 7471.8013 & & & & & & 0.0195 & \\
& 7471.8611 & & & & & & 0.0198 & \\
& 7770.9547 & 75 & 0.07 & m2 & G & ST8 & 0.0140 & ESAOBELA17/DSP\\
& 7772.8602 & 212 & 0.16 & m1 & V & 1001 & 0.0152 & ESAOBELA17/DSP\\
& 7772.9198 & & & & & & 0.0152 & \\
& 7772.9791 & & & & & & 0.0150 & \\
& 7774.8247 & 150 & 0.147 & m1 & V & 1001 &0.0158 & ESAOBELA17/DSP\\
& 7774.8858 & & & & & & 0.0174& \\
& 7774.9449 & & & & & & 0.0170& \\
& 7778.8709 & 89 & 0.09 & m1 & V & 1001 &0.0153 & ESAOBELA17/DSP\\
& 7778.9311 & & & & & & 0.0159& \\
EH Lib& 6753.9800 & 280 & 0.1552 & m1 & wo &    8300 &0.0035 & DSP/DSP\\
&   7459.8721 & 103 & 0.0878 & m1 & V & 1001 &0.0043 & AOA16/CVR\\
EH Lib& 7460.8441 & 103 & 0.0803 & m1 & V & 1001 &0.0037 & AOA16/CVR\\
& 7481.8879 & 90 & 0.1339 & m1 & G & 8300 &0.0052 & AOA16/CVR\\
& 7481.9756 & & & & & & 0.0045& \\
SZ Lyn&     7730.8865&  56&     0.06&       m1&         V&      1001&0.0371         &       TAO/ARL      \\
    &   7764.8761&  166&        0.14&       m1&         G&      ST8&        0.0359  &        ESAOBELA17/ARL     \\
    &   7765.8415&  161&        0.13&       m1&         G&      ST8&    0.0370      &        ESAOBELA17/ARL     \\
    &   7766.8055&  155&        0.13&       m1&         V&      1001&   0.0367  &        ESAOBELA17/ARL      \\
    &   7777.7738&  90&     0.06&       me&         G&      ST8&    0.0363      &       ESAOBELA17/ARL   \\
BO Lyn& 7399.9256 & 37 & 0.0790 & 84 & v & phot &  & AAS,JG/JHP\\
& 7401.9861 & 41 & 0.086 & 84 & v & phot & & AAS,JG/JHP\\
& 7409.8305 & 297 & 0.228 & m14 & G & 8300 & & ESAOBELA16/JCC\\
& 7409.9249 & & &  & & & & \\
& 7411.8816 & 266 & 0.123 & m14 & G & 8300 & & ESAOBELA16/JCC\\
& 7412.7273 & 356 & 0.165 & m14 & G & 8300 & & ESAOBELA16/JCC\\
& 7412.8212 & & & & & & & \\
& 7425.7953 & 469 & 0.227 & m2 & & & & AAS,JG/\\
& 7425.8890 & & & & & & & \\
& 7770.8271 & 161 & 0.1268 & m1 & V & 1001 & & ESAOBELA17/CVR\\
& 7774.8653 & 148 & 0.1424 & m2 & G & ST8 & & ESAOBELA17/CVR\\
& 7776.8271 & 130 & 0.1367 & m2 & G & ST8 & & ESAOBELA17/CVR\\
& 7775.7983 & 106 & 0.1081 & me & G & 8300 & & ESAOBELA17/JCC\\
AE UMa& 7480.7170 &  &  & 1M & G & 8300 &0.0055 & JG/ARL\\
& 7480.7995 & & & & & &0.0020 & \\
& 7776.7838 & 290 & 0.23 & m1 & V & 1001 &0.0015 & ESAOBELA17/DSP\\
& 7776.8661 & & &  &  &  &$-$0.0021 & \\
& 7776.9566 & & &  &  &  &0.0023 & \\
& 7778.8489 & & & me & G & 8300 &0.0023 & ESAOBELA17/DSP\\
\end{longtable}
\end{center}


\normalsize{
\noindent
\begin{tabular}{lll}
\textbf{Remarks:}       &                   &   \\
1. Telescope            &   2. Detector         &   3. Filter\\
1M - 1m telescope       &   ST8  - CCD camera ST-8      &   V - V-filter in UBV system\\
me - 10" Meade telescope equatorial & &\\
m1 - 10" Meade telescope    &   1001 - CCD camera ST-1001   &   G - green in RGB set\\
m2 - 10" Meade telescope    &   8300 - CCD camera ST-8300   &   y - y-filter in \textit{uvby} system\\
c11 - 11" Celestron telescope   &   phot - \textit{uvby} photometer &   wo - without filter\\
84 - 0.84m telescope        &   e2v2 - CCD camera e2v-4290  &   \\
\end{tabular}
\\
\vskip 0.5cm
\noindent
\begin{tabular}{ll}
AAS:& A. A. Soni\\
OTA:& O. Trejo\\
ARL:& A. Renter\'ia\\
JHP:& J. H. Pe\~na\\
CVR:& C. Villarreal\\
 AP:& A. Pani\\
DSP:& D. S. Pi\~na\\
JGT:& J. Guillen\\

\end{tabular}


\vskip 0.5cm

\noindent ESAOBELA16: Rojas, Cesar; Chac\'on, Melissa; Osorio, Mabel; Escobar, Amalia; Osorto, Ram\'on; Rodr\'iguez, Andrea; G\'omez, Jorge; Valera, V\'ictor; Rodr\'iguez, Alexis; Aguilar, Jamie; Arango, Rafael; Agudelo, Malory.

\noindent ESAOBELA17: Ramirez, Vanesa; Rodr\'iguez, Mariana; Vargas, Stephany; Castell\'on, Cindy; Salgado, Ricardo; Mata, Joaquin; Santa Cruz, Ra\'ul; Chipana, Karol; Gonzales, Lisseth; Rodr\'iguez, Reina; De la Fuente, Diana.

\noindent TAO: Lenis, Yessica; Palacio, Karla; Montes, Daniela; Rojas, Carolina; Cutiva, Alejandra; Deras, Dan; Miriam, Rojas; Sanchez, Javier; Hern\'andez, \'Erika.

\noindent AOA16: Juarez, Karen; Lozano, Karen; Padilla, Artemio; Vel\'azquez, Roberto; Santillan, Priscila.

\noindent AO17: Calder\'on, Jossette; Garc\'ia, Diego; Gonz\'alez, Erik; Paredes, Jes\'us.



\newpage

\large

\noindent{\bf Acknowledgments:} We would like to thank the staff of
the observatories for their assistance in securing the observations,
A. D\'iaz, C. Guzm\'an, F. Ru\'iz, E. Colorado and F. Angeles for
technical support. This work was partially supported by IAU and
DGAPA through PE113016 and IN106615. Typing and proofreading were
done by J. Orta and J. Miller, respectively.


\references

Collins, K., Kielkopf, J., 2012, {\tt http://ascl.net/1309.001}

Pe\~na, J. H., Villarreal, C., Pi\~na, D. S.,  et al., 2016, {\it RevMexAA}, {\bf 52}, 385

Samus N. N., Kazarovets E. V., Durlevich O.V., Kireeva N. N.,
Pastukhova E. N., 2017, {\it Astronomy Reports}, {\bf 61}, 80 \DOI{10.1134/S1063772917010085}

\endreferences}

\end{document}
