\documentstyle[twoside, ibvs2, epsf]{article}


\begin{document}

\IBVShead{5557}{6 August 2004}

\IBVStitle{New Elements for 80 Eclipsing Binaries IV.}

\IBVSauth{Otero, Sebasti\'an A.$^{1,2}$; Dubovsky, Pavol A.$^3$}

\IBVSinst{Grupo Wezen 1 88, Buenos Aires, Argentina; e-mail: varsao@fullzero.com.ar}
\IBVSinst{Centro de Estudios Astron\'\i micos (CEA), Mar del Plata, Argentina}
\IBVSinst{Slovak Association of Amateur Astronomers, Podbiel, Slovakia; e-mail: vkco@isternet.sk}

\IBVStyp{ EA EB EW }

\IBVStyp{ variable stars, eclipsing binary, periods }

\IBVSabs{This research presents new elements for 80 eclipsing binaries found}
\IBVSabs{with the help of the ASAS-3, Hipparcos and NSVS databases.}


\begintext

The ASAS-3 (Pojmanski, 2002) and Hipparcos (Perryman et al., 1997) databases have been used as in the previous lists (Otero, 2003) to find new elements for 80 eclipsing binaries. Starting with this paper, the NSVS (Northern Sky Variability Survey) database (Wozniak et al., 2004) has also been used.
The NSVS observations were collected by the ROTSE-1 experiment using a robotic system of four unfiltered telephoto lenses equipped with CCD cameras. 
The spectral response ranges from 450 to 1000 nm covering from mid-B to mid-I Johnson-Cousins photometric passbands. Magnitudes were calibrated against 500-1000 Tycho stars per frame.
NSVS data have been combined with ASAS-3 and Hipparcos data to improve the period determinations and a systematic offset of all the ROTSE-1 magnitudes to the V magnitude of the stars has been applied. No amplitude difference has been found in any case so the ranges given are V-band magnitudes.
For stars more northern than +28\deg\ declination, when neither ASAS nor Hipparcos magnitudes were available, observations from the TASS (Droege, 2003) database have been used in combination with NSVS data. In these cases, extreme care was taken in order to avoid error dates or problems that can arise from the use of this experimental dataset (Droege, 2004). Light curves were cleaned of the dubious observations therein that showed clear deviation from the mean magnitude in the folded light curves, prior to deriving the final elements. Saturated data in ASAS-3 and flagged observations in the Hipparcos Epoch Photometry and the NSVS dataset were also discarded.
Hipparcos observations have been transformed to V using a table by the author published electronically in IBVS No.~5482 (Otero, 2003b).
The candidate stars were selected from the Hipparcos Variability Annex and the NSV catalogue (Kukarkin and Kholopov, 1982) and its supplement (NSVS) (Kazarovets et al., 1998). Stars classified as eclipsing binaries and those showing mean Hp magnitudes close to the maximum Hp values in the Hipparcos Variability Annex were identified and their ASAS-3 and/or NSVS data subsequently obtained. Stars classified as possible eclipsing systems (of all types) and those with a spectral type between O and G that had no given classification within the NSV catalogues were also checked.
The method of bisected chords was used to determine times of minima. The accuracy depends on the quantity and quality of the observations. Elements were found with AVE (Barber\'a, 1999) and a Microsoft Excel period search utility kindly provided by Patrick Wils (Wils, 2003).
Table 1 shows the list of variables. The first column gives the variable star designation according to the GCVS. The following columns give another identifier; the brightness range of the variable, with the magnitude of secondary eclipse between brackets; the epoch of minimum light derived from the complete dataset; the period; the variability class and the spectral type with a note to the spectral type source.


\begin{table}
\centerline{Table 1. New elements for 80 eclipsing binary stars.}
\small
\begin{center}
\begin{tabular}{ccc@{$-$}ccccc}
\hline
\multicolumn{2}{c}{Star Name} & \multicolumn{2}{c}{Magnitude range} &   Epoch &     Period& Type & Spectral type\\ 
 Variable  &  Other ID  & \multicolumn{2}{c}{($V$)} & (HJD2440000+)  & (days)  & &\\
\hline
AC Pyx   * & HIP 041811  &   7.78 &  8.06 (8.03) &  8503.246 &  7.66793    & EA &         A0/A1IV (4)\\
DP Cet   * & HIP 010099  &   6.79 &  6.99 (6.9:) &  8686.729 &  2.36817    & EA &         A2 (24)\\
DV Boo   * & HIP 070287  &   7.53 &  7.76 (7.69) &  8045.254 &  3.78264    & EA &         F1Vm (8)\\
GZ Dra   * & HIP 089243  &   9.46 &  9.78 (9.6:) &  8745.844 &  2.253355   & EA &         F0 (24)\\
GZ UMa     & HIP 052892  &  10.48 & 11.02(10.98) & 11556.830 &  6.5420     & EA &         G0 (28)\\
IL Lib   * & HIP 074127  &   7.56 &  7.84(7.81:) &  8443.842 &  5.76937    & EA &         F0V (5)\\
IV Lib   * & HIP 076480  &   8.35 &  8.95 (8.55) & 11932.900 &  6.8617     & EA/GS &    K1III+(F) (4)\\
IW CMa     & HIP 030583  &   6.88 &  7.02 (6.99) &  8799.850 &  6.23584    & EA &        A0V (3)\\
KV CMa   * & HIP 032856  &   7.16 &  7.40(7.40:) &  8353.430 & 68.3842     & EA &        B3n (44)\\
LL Aqr   * & HIP 111454  &   9.23 &  9.86 (9.59) &  8762.552 & 20.1784     & EA &        G1V (5)\\
LQ Mus   * & HIP 062801  &   9.04 &  9.66:(9.65) & 12712.719 &  7.50640    & EA &        F5V (1)\\
MP Del   * & HIP 100981  &   7.56 & 7.87 (7.81:) &  8246.300 & 21.3387     & EA &        A3mA8-F3 (27)\\
NSV 00233*  & GSC 0013 0919 & 11.97 & 12.52(12.41) & 11384.436 &  4.09242    & EB&\\
NSV 00726   & GSC 2317 0163 & 11.90 & 12.5:(12.05) & 11437.733 &  0.88198    & EB:	&\\
NSV 01403   & GSC 4327 0280 & 12.30 & 14.4 (12.47) & 11401.892 &  1.40856    & EA&\\
NSV 02470   & GSC 0714 0391 & 11.95 & 13.32 (12.3) & 12896.886 &  5.5416     & EA	&\\
NSV 03443   & GSC 9380 1419 & 12.45 & 14.6 (12.65) & 11935.585 &  4.5521     & EA&\\
NSV 03728   & GSC 0790 0482 & 11.32 & 11.95(11.83:) & 12971.806 &  2.14948    & EA &     \\
NSV 04638   & GSC 4631 1042 & 10.57 & 10.95(10.85) & 11278.439  & 0.690046   & EB&	F4(14)\\
NSV 05040   & GSC 3827 0163 & 12.68 & 13.4 (13.4:) & 11306.810  & 3.02405    & EA&\\	
NSV 05914   & GSC 6110 0930 & 12.76 & 14.7(13.05:) & 12086.498  & 1.78878    & EA&\\
NSV 06157* & HIP 064716   &  8.77 &  8.98 (8.87) & 11955.858 & 13.4197     & EA &        B1/2V (1)\\
NSV 06968   & GSC 7830 0775 & 12.15 & 14.2:(12.32) & 12441.566 &  5.4193     & EA&\\
NSV 07178* & HD  139337   &  9.20 &  9.56 (9.51) & 12062.557  & 3.2300     & EA &        B9IV (1)    \\    
NSV 07400* & HD  143511   &  8.33 &  8.88 (8.85) & 12104.552  & 5.5354     & EA &        A0IV/V (1)\\
NSV 07746   & GSC 7348 1787 & 12.88 & 14.2:(13.07) & 12924.412 &  2.918      & EA&\\
NSV 08499   & GSC 4568 0313 & 11.09 & 12.00(11.70) & 11274.913 &  0.32540    & EW &\\
NSV 10982*  & GSC 5699 2009 & 9.69 &  9.96 (9.93) & 12879.618  & 4.95232    & EA/KE  &   B1:V:pe (36)\\
NSV 11243* & HD  172666  &  10.05 & 10.55:(10.27) & 12104.605  & 6.4478     & EA &        A9IV (2)\\
NSV 11781* & HD  178755  &   8.60 & 9.05 (8.88:) & 12474.633 & 11.7902     & EA &        B9V (3)\\
NSV 12326   & GSC 8778 1496 & 12.76 & 13.74(12.9:) & 12069.712 &  0.844598   & EA&\\
NSV 12870*  & GSC 2679 2844 & 10.97 & 11.27 (11.2) & 11354.500 & 32.34       & EB/GS:&\\ 
NSV 13121   & GSC 0522 0799 & 12.25 & 12.45(12.93:) & 12832.775 &  0.646147   & EA&\\
NSV 13625*          &       & 13.4 &  14.1 (13.6) &  11282.392  & 1.31477    & EB&\\
NSV 15234* & HIP 004974  &   8.78 & 9.0: (8.92:) & 12559.740 & 14.7104     & EA &        F5/6V (3)\\
NSV 15375* & HIP 008156  &   8.44 &  8.54(8.51:) &  8648.639 &  1.69261    & EA &        F0 (24)\\
NSV 15730  & HIP 017094  &   9.73 & 10.03(10.0:) &  8678.948 &  3.76674    & EA &        A4IV (8)\\
NSV 16199* & HIP 022979  &   9.07 &  9.20(9.18:) &  8181.925 &  1.528311   & EA &        A0 (24)\\
NSV 16296* & HIP 025174  &   7.08 &  7.14 (7.12) &  8188.925  & 2.22878    & EA &        B9.5V (5)\\
NSV 17236* & HIP 033303  &   8.21 &  8.41 (8.41) & 12232.752 &  0.372457   & EW &       F6/8+G6/8 (5)\\
NSV 17283* & HIP 033844  &   7.73 &  7.82 (7.78) & 12942.804 &  3.37443    & EB &       A2V (3)\\
NSV 17436  & HIP 035624  &   8.74 &  8.92 (8.78) &  8536.929 &  1.04776    & EA &        A2 (24)\\
NSV 17456* & HIP 035859  &   7.98 &  8.11 (8.02) &  7912.729 &  2.198515   & EA &        B9III (3)\\
NSV 17552  & HIP 037455  &   8.12 &  8.33(8.30:) &  8196.000 & 31.4204     & EA &        B9.5/A0IV (5)\\
NSV 17578* & HD  062589  &   8.11 &  8.35 (8.33) & 12540.855 &  6.3177     & EA &        B3IVk (45)\\
NSV 17647* & HIP 038581  &   8.13 &  8.22 (8.20) &  8588.418 &  7.72461    & EA &        A0V (5)\\
NSV 17723* & HIP 039390  &   9.04 &  9.16 (9.10) &  7913.248 &  1.425902   & EA &        A0V (3)\\
NSV 18104* & HD  077207  &   9.37 &  9.48 (9.47) & 12714.620 & 11.4248     & EA &        B0IVnp (17)\\
NSV 18480* & HIP 052362  &   9.04 &  9.22 (9.22) &  8970.460 &  1.46857    & EA &        F2V (2)\\
NSV 18546* & HIP 053209  &   9.27 &  9.50(9.50:) &  8058.296 &  5.50762    & EA &        G5IV (42)\\
NSV 18553* & HIP 053357  &   9.47 &  9.63 (9.60) &  8603.597 &  2.354858   & EA &        A7III (24)\\
NSV 18786* & HIP 056249  &   7.88 &  7.96 (7.95) &  8502.854 &  5.48793    & EA &        B9.5V (1)\\
NSV 19698* & HIP 063245  &   9.78 & 10.03(9.99:) &  8557.320 &  7.1520     & EA &        A3 (24)\\
NSV 19703   & GSC 8994 2160 & 10.44 & 10.67(10.65) & 11985.818 & 11.0385     & EA &        B3-B5 (46)\\
NSV 19773* & HIP 065380   &  9.42 &  9.59 (9.50) &  8331.778  & 0.795629   & EA &        A1V (24)\\
\hline
\end{tabular}
\end{center}
\end{table}


\begin{table}
\centerline{Table 1. New elements for 80 eclipsing binary stars.}
\small
\begin{center}
\begin{tabular}{ccc@{$-$}ccccc}
\hline
\multicolumn{2}{c}{Star Name} & \multicolumn{2}{c}{Magnitude range} &   Epoch &     Period& Type & Spectral type\\ 
 Variable  &  Other ID  & \multicolumn{2}{c}{($V$)} & (HJD2440000+)  & (days)  & &\\
\hline
NSV 20174* & HIP 072178   &  8.66 &  8.75 (8.75) &  8347.805  & 7.06114    & EA/DM&     F3/F5V (2)\\
NSV 20433* & HIP 077972   &  8.67 &  9.06 (8.82) & 13170.910 & 29.6924     & EA &        F5 (24)\\
NSV 20782  & HIP 082378   &  7.96 &  8.07 (8.01) &  8704.307 &  4.49244    & EA &        O9.5IV (39)\\
NSV 20827* & HD  152333   &  7.96 &  8.19 (8.11) & 12439.649  & 2.15767    & EA/KE &    09.5IV (47)\\
NSV 20894* & HIP 083583   &  8.87 &  9.03(9.02:) &  8005.710 & 29.3467     & EA &        B9IV/V (3)\\
NSV 20913* & HIP 083634   &  8.26 &  8.43 (8.36) & 12787.824 & 10.8743     & EA &        A5 (33)\\
NSV 22984* & HIP 086058   &  9.04 &  9.15 (9.15) &  8604.780 &  3.10886    & EA &        A0 (24)\\
NSV 24620* & HIP 092754   &  9.68 &  9.96(9.96:) &  8017.991 &  1.21125    & EA &        G3V (2)\\
NSV 25862* & HIP 109743   &  9.09 &  9.25 (9.17) & 11450.602 &  6.00911    & EA &        B8 (24)\\
NSV 25928* & HIP 111590   &  9.84 & 10.04(10.02:) &  8305.198 &  6.15727    & EA &        B9V (8)\\
PQ Vel   * & HIP 044612   &  7.63 &  7.81(7.75:) &  8256.740 & 22.2632     & EA &        A2/3III(m) (2)\\
PS Ser   * & HIP 077045   &  8.08 &  8.37(8.16:) &  8596.364 & 15.8861     & EA/RS   &  F8+F8 (37)\\
QR Hya   * & HIP 053487   &  8.39 &  8.70(8.45:) &  8948.181 &  2.502939   & EA &        G1V (3)\\
QT Peg     & HIP 112058   &  7.43 &  7.75 (7.46) &  8645.097 &  3.5937     & EA &        A1V (27)\\
QY Vel   * & HIP 048185   &  8.13 &  8.30 (8.19) &  8753.850 & 46.390      & EA/GS  &   G5III (2)\\
V0339 Gem  & HIP 035428   &  8.86  & 9.37 (8.89) &  8361.280 &  2.88032    & EA &        A3m (32)\\
V0365 Pup* & HIP 035447   &  7.82 &  8.60(8.06:) &  8202.637 &  30.0338    & EA/DM    & A0V (3)\\
V0392 And* & HIP 116685   &  9.07  & 9.41 (9.41) &  8035.107 &  4.046275   & EA &        A2 (24)\\
V0394 Vul  & HIP 097500   &  8.70 &  8.98 (8.83) &  8248.702 &  3.080315   & EA &        A3 (24)\\
V0454 Cep* & HIP 113065   &  9.04 &  9.30 (9.13) &  8313.100 &  5.58450    & EA &        B1V (43)\\
V0467 Car* & HIP 040838   &  8.02 &  8.45 (8.09) &  8692.080 &  7.04615    & EA &        B9IV (1)\\
V0775 Cas* & HIP 008693   &  9.73 & 10.26(10.07) &  8766.027 &  5.39017    & EA &        B8V (38)\\
V0912 Her* & HIP 081967   &  8.59 &  8.73 (8.72) &  8002.955 &  3.40985    & EA &        G5 (24)\\
V1044 Sco* & HIP 078708   &  8.60 &  9.07 (8.92) & 13064.836 &  0.914833   & EA &        K0V (4)\\
V1126 Tau* & HIP 017040   & 10.37 & 10.54(10.53:) &  8527.515 &  3.38751    & EA &        F8 (28)\\
\hline
\end{tabular}
\end{center}
{\bf Sources of spectral type:} (1) Houk and Cowley, 1975. (2) Houk, 1978. (3) Houk, 1982. (4) Houk and Smith-Moore, 1988. (5) Houk and Swift, 1999. (8) Kennedy, 1983. (14) Kholopov et al., 2003. (17) Buscombe, 1998. (24) Ochsenbein, 1980. (27) Grenier et al., 1999. (28) Kharchenko, 2001. (32) Bartaya, 1987. (33) Cannon and Pickering, 1993. (36) Jaschek et al., 1964. (37) Batten et al., 1989. (38) Boulon and Fehrenbach, 1958. (39)~Schild et al., 1969. (42) Glebocki et al., 2000. (43) Hardorp et al., 1959-1965. (44) Rubin et al., 1962. (45) Skiff, 2003. (46) Sundman et al., 1974. (47) Jaschek, 1978.\\
~\\
{\bf Notes on individual stars:\\}
AC Pyx    = Eccentric system. Visual binary. $A$=8\fmm0; $B$=10\fmm0 Hp. Sep. 1\fmm91 (Perryman et al., 1997).\\
DP Cet    = Slightly eccentric. Wrong period in the HIP catalogue (3\fday1748 ).\\
DV Boo    = Wrong period of 1\fday26086 in the HIP catalogue.\\
GZ Dra    = Visual binary. $A$=9\fmm9; $B$=10\fmm9 Hp. Sep. 0\farcs43 (Perryman et al., 1997).\\
IL Lib    = Primary eclipse might be the secondary.\\
IV Lib    = Wrong period in the HIP catalogue (6\fday3605). Changing O'Connell effect. Visual binary. $B$=11\fmm8. Sep. 4\farcs2 (Dommanget et Nys, 2002).\\
KV CMa    = Eccentric system. Primary eclipse might be the secondary. Period found with help of visual observations by the author.\\
LL Aqr    = Eccentric system.\\
LQ Mus    = Wrong period in the HIP catalogue (4\fday0070). Primary eclipse might be the secondary.\\
MP Del    = Eccentric system.\\
NSV 00233 = Strong and variable O'Connell effect. Max. II $V$=12\fday07.\\
NSV 06157 = Eccentric system. Not classified as variable in the HIP catalogue although there were 3 secondary eclipses recorded.\\
NSV 07178 = Eccentric system.\\
NSV 07400 = Eccentric system.\\
NSV 10982 = Classified as a GCAS star in the NSV catalogue (Kukarkin and Kholopov, 1982).\\
NSV 11243 = Slightly eccentric.\\
NSV 11781 = Eccentric system.\\
NSV 12870 = Classified as LB in the NSV catalogue (Kukarkin and Kholopov, 1982). Tycho-2 $B-V$=0\fmm82 (Hog et al., 2000)\\
\end{table}

\begin{table}
\small
NSV 13625 = Inaccurate position in the GCVS. The star is USNO-A2.0 1275-15145487. UCAC2 (Zacharias et al., 2003) position is 21\hr 15\mm 37\fsec231 +38\deg 02\arcm 27\farcs70 (2000.0). ROTSE1 magnitudes, no data from TASS.\\
NSV 15234 = Eccentric system. Visual binary. $A$=9\fmm5; $B$=9\fmm8 Hp. Sep. 0\farcs80 (Perryman et al., 1997).\\
NSV 15375 = Visual binary. $A$=9\fmm1; $B$=9\fmm8. Sep. 0\farcs2 (Dommanget et Nys, 2002).\\
NSV 16199 = Visual binary. $A$=10\fmm0; $B$=9\fmm8 Hp. Sep. 0\farcs86 (Perryman et al., 1997).\\
NSV 16296 = Visual binary. $A$=7\fmm72; $B$=7\fmm98 V (Shatsky et al., 1999). Sep. 4\farcs76 (Perryman et al., 1997)\\
NSV 17236 = Period given is based only on ASAS-3 data. Possible period change, HIP observations are noisy due to duplicity but only fit at a period of 0\fday372461. Visual binary. $A$=8\fmm6v; $B$=9\fmm84 (Mermilliod et al., 1997). Combined brightness given. Sep. 13\farcs9 (Perryman et al., 1997).\\
NSV 17283 = Period 1\fday6872 in the HIP catalogue with no variability type.\\
NSV 17456 = Eccentric system.\\
NSV 17578 = Eccentric system. Visual binary. $A$=8\fmm6; $B$=9\fmm1 V. Sep. 0\farcs2 (Dommanget et Nys, 2002).\\
NSV 17647 = ASAS-3 V-magnitudes are 0.05 mag. fainter than Hipparcos V-magnitudes. ASAS mag. were adopted.\\
NSV 17723 = Visual binary. $A$=9\fmm65; $B$=10\fmm0 Hp. Sep. 8\farcs59 (Perryman et al., 1997).\\
NSV 18104 = Slightly eccentric.\\
NSV 18480 = Slightly eccentric system. Primary eclipse might be the secondary.\\
NSV 18546 = Period might be half the value given. Visual binary. $A$=9\fmm6; $B$=11\fmm9 Hp. Sep 1\farcs12 (Perryman et al., 1997).\\
NSV 18553 = Koen an Eyer (2002) give a wrong period of 0.5886647 d.\\
NSV 18786 = Eccentric system.\\
NSV 19698 = Slightly eccentric.\\
NSV 19773 = Koen and Eyer (2002) give per = 0.3977978 d.\\
NSV 20174 = Period might be half the value given. Primary eclipse might be the secondary.\\
NSV 20433 = Very eccentric system. Total eclipses. \\
NSV 20827 = Spectroscopic binary with a period of 2\fday1579 in Batten et al., 1989.\\
NSV 20894 = Period might be half the value given.\\
NSV 20913 = Eccentric system. Visual binary. $A$=8\fmm6; $B$=10\fmm1 Hp. Sep. 1\farcs44 (Perryman et al., 1997).\\
NSV 22984 = Primary eclipse might be the secondary.\\
NSV 24620 = Visual binary. $A$=9\fmm9; $B$=13\fmm3 Hp. Sep. 3\farcs14 (Perryman et al., 1997).\\
NSV 25862 = Visual binary. $A$=9\fmm2; $B$=12\fmm7 Hp. Sep 0\farcs72 (Perryman et al., 1997).\\
NSV 25928 = Period might be half the value given. \\
PQ Vel    = Eccentric system. Period 22\fday25 in the HIP catalogue. Very few observations at minimum II.\\
PS Ser    = RS period is 18\fday843 Koen and Eyer (2002) give per= 18\fday769 Known as a spectroscopic binary with a period of 15\fday8880 (Batten et al., 1989) Visual binary. $A$=8\fmm7; $B$=9\fmm3 Hp. Sep. 0\farcs4 (Perryman et al., 1997). B is also a spectroscopic binary. AB-combined light given. The F8+F8 spectrum is for the unresolved A and B stars.\\
QR Hya    = Eccentric system.\\
QY Vel    = Wrong period in the HIP catalogue (9\fday571).\\
V0365 Pup = Eccentric system. Period 30\fday01 in the HIP catalogue.\\
V0392 And = Period might be half the value given. Primary eclipse might be the secondary. Visual binary. $A$=9\fmm3; $B$=11\fmm5 Hp. Sep. 2\farcs28 (Perryman et al., 1997). Hipparcos $B-V$ (0\fmm14) is wrong. $B-V$ from Tycho-2 is 0\fmm42, consistent with TASS V magnitude.\\
V0454 Cep = Slight apsidal motion. Batten et al. (1989) give a spectroscopic period of 5\fday6556.\\
V0467 Car = Eccentric system.\\
V0775 Cas = Eccentric system. Wrong period suggested in the HIP catalogue (2\fday95946).\\
V0912 Her = Primary eclipse might be the secondary.\\
V1044 Sco = Visual binary. $A$=8\fmm8; $B$=11\fmm5 Hp. Sep. 10\farcs3 (Perryman et al., 1997). Cutispoto et al. (1999) give spectral type G9V+M0:V+K7:V. According to Woolley et al. (1970), the M0 star is the visual binary.\\
V1126 Tau = Visual binary. $A$=10\fmm7; $B$=12\fmm5 Hp. Sep. 0\farcs28 (Perryman et al., 1997).\\
\end{table}

\IBVSetable{5557-t2.tex}
\IBVSecomment{The table with light curve links}

\IBVS2fig{7cm}{5557-f1.eps}{Light curve of LL Aqr showing ASAS-3, Hipparcos and NSVS observations.}{5557-f2.eps}{Light curve of NSV 00233 showing ASAS-3 and NSVS observations.}
\IBVSfigKey{5557-f1.eps}{LL Aqr}{light curve}
\IBVSfigKey{5557-f2.eps}{NSV 00233}{light curve}

\IBVS2fig{7cm}{5557-f3.eps}{Light curve of NSV 17283 showing ASAS-3 and Hipparcos observations.}{5557-f4.eps}{Light curve of NSV 20827 showing ASAS-3 observations.}
\IBVSfigKey{5557-f3.eps}{NSV 17283}{light curve}
\IBVSfigKey{5557-f4.eps}{NSV 20827}{light curve}

\IBVSfig{7cm}{5557-f5.eps}{Light curve of V0467 Car showing ASAS-3 and Hipparcos observations.}
\IBVSfigKey{5557-f5.eps}{V0467 Car}{light curve}

Acknowledgements: The author wants to thank John Greaves and Patrick Wils for their collaboration and suggestions. This research has made use of the SIMBAD and VizieR databases operated at the Centre de Donn‰es Astronomiques (Strasbourg) in France and the data from the Northern Sky Variability Survey created jointly by the Los Alamos National Laboratory and University of Michigan. The NSVS was funded by US Department of Energy, the National Aeronautics and Space Administration and the National Science Foundation.

\newpage
\references

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\endreferences

\bigskip
\bigskip
\bigskip

%From IBVS 5724
\IBVSerratum{5557}

Sebastian Otero reported the following error:

\begin{table}[h!]
\begin{tabular}{c l l l}
\hline
IBVS No. & item & printed & correct \\
\hline

5557 & identifier (NSV 233) & GSC 0013-0919 & GSC 0013-0976 \\

\hline
\end{tabular}
\end{table}

\end{document}
