\documentstyle[twoside, epsf, hyperref]{article}
\input ibvsn.sty
\input ibvs2.sty
\begin{document}
%\IBVSNhead{6200}
\IBVSheadDOI{62}{6200}{24 February 2017}
\IBVStitle{Reports on New Discoveries}
\IBVSabs{List of newly discovered variables.}
% Previous reports can be found in \IBVSshortlink{http://www.konkoly.hu/cgi-bin/IBVS?6100}{IBVS No. 6100}.
\IBVSnews{04 July 2014}
{Martignoni, Massimiliano - Stazione Astronomica Betelgeuse, Magnago, Milano, Italy, massimiliano.martignoni@alice.it \\ %email
}{1}
\IBVSnstar{
17 17 45.37 }
{ 11 09 32.5 }
{DSCT }
{13.15 - 13.35 (V)}
{ 0.217045 d }
{2456745.613 }
{ UCAC4 506-065333 =
CSS J171745.4+110932
}
{finding chart, \IBVSefigure{6200-f1.ps}
\IBVSfigKey{6200-f1.ps}{UCAC4 506-065333}{finding chart}
light curve, \IBVSefigure{6200-f2.ps}
\IBVSifigure{6200-f2}
\IBVSfigKey{6200-f2.ps}{UCAC4 506-065333}{light curve}
data file \IBVSedata{6200-t1.txt}
\IBVSdataKey{6200-t1.txt}{UCAC4 506-065333}{photometry}
}{1}
Remark: UCAC4 506-065333 is a DSCT type pulsating variable star in the field of view of V452 Oph.
It was observed with a 0.25\,m Schmidt-Cassegrain telescope (f/10) of the Stazione Astronomica Betelgeuse in Magnago, Italy equipped with a 512$\times$512 pixels Kodak KAF261E CCD cooled to (typ.) $-$20$\deg$C; 1.6 arcsec per pixel (1$\times$1 binning); 14\arcm$\times$14\arcm~field of view, with {\it V} and $R_C$ photometric filters.
As comparison and check stars were used UCAC4 506-065387 and UCAC4 506-065389.
A total of 119 measurements in {\it V} band and 94 in $R_C$ band were collected; reduction to the standard photometric system was not performed.
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\IBVSnews{15 August 2014}
{Essam, Ahmed - Astronomy Department, National Research Institute of Astronomy and Geophysics (NRIAG),
11421 Helwan, Egypt, address:essam60@yahoo.com \\ %email
}{2}
\IBVSnstar{
15 58 28.08 }
{ --02 57 53.6 }
{EW }
{15.03 - 15.74 (V)}
{ 0.361456 d }
{2456827.46801 $\pm$ 0.000334}
{ UCAC4 436-062932 = 2MASS J15582807-0257536 = CSS J155828.1-025753 = USNO-B1.0 0870-0361232
}
{finding chart, \IBVSefigure{6200-f3.eps}
\IBVSfigKey{6200-f3.eps}{UCAC4 436-062932}{finding chart}
light curve, \IBVSefigure{6200-f4.eps}
\IBVSifigure{6200-f4}
\IBVSfigKey{6200-f4.eps}{UCAC4 436-062932}{light curve}
data file \IBVSedata{6200-t2.txt}
\IBVSdataKey{6200-t2.txt}{UCAC4 436-062932}{photometry}
}{2}
Remark: All the observations have been carried out by using the EEV CCD 42-40 camera with a format of 2048$\times$2048 pixels, cooled by liquid nitrogen attached on the Newtonian focus of the 1.88~m Kottamia reflector telescope in Egypt.
Comparison star: UCAC4 436-062934. Check star: GSC~0502300278.
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\IBVSnews{15 December 2014}
{Liakos, A. - National Observatory of Athens, Institute for Astronomy, Astrophysics, Space Applications, and Remote Sensing, Palaia Penteli, Athens, Hellas (Greece), alliakos@noa.gr \\%email
Dakanalis, I. - National and Kapodistrian University of Athens, Department of Astrophysics, Astronomy and Mechanics, Zografos, Athens, Hellas (Greece); National Observatory of Athens, Institute for Astronomy, Astrophysics, Space Applications, and Remote Sensing \\
Niarchos, P. - National and Kapodistrian University of Athens, Department of Astrophysics, Astronomy and Mechanics, pniarcho@phys.uoa.gr\\%email
}{3}
\IBVSnstar{
20 27 52.536 }
{ +24 41 30.96 }
{EW? }
{14.9 (R)}
{ 0.35806(7) d }
{2455391.447(1) }
{ USNO-A2.0 1125-16060074 = 2MASS 20275251+2441305 }
{finding chart, \IBVSefigure{6200-f5.eps}
\IBVSfigKey{6200-f5.eps}{USNO-A2.0 1125-16060074}{finding chart}
light curve, \IBVSefigure{6200-f6.eps}
\IBVSifigure{6200-f6}
\IBVSfigKey{6200-f6.eps}{USNO-A2.0 1125-16060074}{light curve}
data file \IBVSedata{6200-t3.txt}
\IBVSdataKey{6200-t3.txt}{USNO-A2.0 1125-16060074}{photometry}
}{3}
\IBVSnstar{
20 28 36.715 }
{ +24 56 04.70 }
{RR }
{13.1 (R)}
{ 0.3468(2) d }
{2455392.337(3) }
{ USNO-A2.0 1125-16097188 = NOMAD1 1149-0516720 }
{finding chart, \IBVSefigure{6200-f7.eps}
\IBVSfigKey{6200-f7.eps}{USNO-A2.0 1125-16097188}{finding chart}
light curve, \IBVSefigure{6200-f8.eps}
\IBVSifigure{6200-f8}
\IBVSfigKey{6200-f8.eps}{USNO-A2.0 1125-16097188}{light curve}
data file \IBVSedata{6200-t4.txt}
\IBVSdataKey{6200-t4.txt}{USNO-A2.0 1125-16097188}{photometry}
}{4}
Remark: Both stars detected in the FoV of AW Vul and the newly discovered variable (marked as NV1 in the finding chart) 2MASS J20275736+2453029 (Liakos \& Niarchos 2010).
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\IBVSnews{15 December 2014}
{Liakos, A. - National Observatory of Athens, Institute for Astronomy, Astrophysics, Space Applications, and Remote Sensing, Palaia Penteli, Athens, Hellas (Greece), alliakos@noa.gr \\%email
Nanouris, N. - National Observatory of Athens, Institute for Astronomy, Astrophysics, Space Applications, and Remote Sensing, Palaia Penteli, Athens, Hellas (Greece), nanouris@noa.gr\\%email
}{4}
\IBVSnstar{
22 19 10.737 }
{ +70 55 55.94 }
{S }
{19.7 (R)}
{ Multiperiodic }
{-- }
{ NOMAD1 1609-0153378 = USNO B1.0 1609-0151173 }
{finding chart, \IBVSefigure{6200-f9.eps}
\IBVSfigKey{6200-f9.eps}{NOMAD1 1609-0153378}{finding chart}
light curve (continuous), \IBVSefigure{6200-f10.eps}
\IBVSifigure{6200-f10}
\IBVSfigKey{6200-f10.eps}{NOMAD1 1609-0153378}{light curve}
light curve (stacked), \IBVSefigure{6200-f11.eps}
\IBVSifigure{6200-f11}
\IBVSfigKey{6200-f11.eps}{NOMAD1 1609-0153378}{light curve}
data file \IBVSedata{6200-t5.txt}
\IBVSdataKey{6200-t5.txt}{NOMAD1 1609-01533788}{photometry}
}{5}
\IBVSnstar{
22 19 47.743 }
{+70 57 55.88 }
{EA }
{17.6 (R)}
{ -- }
{-- }
{ NOMAD1 1609-0153459 = USNO B1.0 1609-0151253 }
{finding chart, \IBVSefigure{6200-f12.eps}
\IBVSfigKey{6200-f12.eps}{NOMAD1 1609-0153459}{finding chart}
light curve, \IBVSefigure{6200-f13.eps}
\IBVSifigure{6200-f13}
\IBVSfigKey{6200-f13.eps}{NOMAD1 1609-0153459}{light curve}
data file \IBVSedata{6200-t6.txt}
\IBVSdataKey{6200-t6.txt}{NOMAD1 1609-0153459}{photometry}
}{6}
Remark: Both stars detected in the FoV of the planetary nebula PNG 111.0+11.6. The C-K light curve is given for comparison. NOMAD1 1609-0153378 shows variations on $\sim2$ d and $\sim2-3$ h timescales, therefore it has been classified as ``S -- Unstudied variable star with rapid light changes". \\
NOMAD1 1609-0153459: a single primary and a potential secondary eclipse has been observed, $\sim 2.1$ days apart.
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\IBVSnews{19 December 2014}
{Gazeas, K. - Department of Astrophysics, Astronomy and Mechanics, National and Kapodistrian University of Athens, GR 15784, Zografos, Athens, Greece, kgaze@phys.uoa.gr\\%email
Iliopoulos, I., AKTIS Astronomical Observatory, Oreokastro GR 57013, Thessaloniki, Greece\\%email
}{5}
\IBVSnstar{
19 17 27.07 }
{+06 29 51.7 }
{DSCT }
{ 10.4 (R)}
{0.13727(1) d }
{ 2455062.4224(5) }
{ GSC 0476-1362 = TYC 0476-1362-1 }
{finding chart, \IBVSefigure{6200-f14.eps}
\IBVSfigKey{6200-f14.eps}{GSC 0476-1362}{finding chart}
light curve, \IBVSefigure{6200-f15.eps}
\IBVSifigure{6200-f15}
\IBVSfigKey{6200-f15.eps}{GSC 0476-1362}{light curve}
data file \IBVSedata{6200-t7.txt}
\IBVSdataKey{6200-t7.txt}{GSC 0476-1362}{photometry}
}{7}
Remark: Detected on 29 September 2007 in the FoV of NGC 6781. Epoch refers to maximum light.
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\IBVSnews{7 February 2015}
{Gazeas, K. - Department of Astrophysics, Astronomy and Mechanics, National and Kapodistrian University of Athens, GR 15784, Zografos, Athens, Greece, kgaze@phys.uoa.gr\\%email
Karampotsiou, E. - Department of Astrophysics, Astronomy and Mechanics, National and Kapodistrian University of Athens, GR 15784, Zografos, Athens, Greece, sevi.kar@gmail.com\\%email
}{6}
\IBVSnstar{
05 21 08.24 }
{+03 02 51.9 }
{EA}
{ 11.33 ($V_{\rm T}$ - TYC2)}
{ -- }
{ 2456680.4139(7) }
{ GSC 0104-0634 = TYC 0104-0634-1 }
{finding chart, \IBVSefigure{6200-f16.eps}
\IBVSfigKey{6200-f16.eps}{GSC 0104-0634}{finding chart}
light curve, \IBVSefigure{6200-f17.eps}
\IBVSifigure{6200-f17}
\IBVSfigKey{6200-f17.eps}{GSC 0104-0634}{light curve}
data file \IBVSedata{6200-t8.txt}
\IBVSdataKey{6200-t8.txt}{GSC 0104-0634}{photometry}
}{8}
Remark: Detected on 22 January 2014 in the FoV of 1SWASP J052036.84+030402.1.
\IBVSnstar{
07 33 35.77 }
{$-$20 44 37.2 }
{EA}
{ 12.19 ($V_{\rm T}$ -TYC2)}
{--}
{ 2456730.22(5) }
{ GSC 5991-1106 = TYC 5991-1106-1 }
{finding chart, \IBVSefigure{6200-f18.eps}
\IBVSfigKey{6200-f18.eps}{GSC 5991-1106}{finding chart}
light curve, \IBVSefigure{6200-f19.eps}
\IBVSifigure{6200-f19}
\IBVSfigKey{6200-f19.eps}{GSC 5991-1106}{light curve}
data file \IBVSedata{6200-t9.txt}
\IBVSdataKey{6200-t9.txt}{GSC 5991-1106}{photometry}
}{9}
%Corrected: Tue Mar 10 15:41:17 CET 2015
Remark: Detected on 13 March 2014 in the FoV of TY Pup.
\IBVSnstar{
07 32 38.99 }
{$-$20 46 52.1 }
{DSCT}
{ 11.14 ($V_{\rm T}$ - TYC2)}
{0.18236(2) }
{ 2456714.2422(5) }
{ GSC 5991-1727 = TYC 5991-1727-1 }
{finding chart, \IBVSefigure{6200-f20.eps}
\IBVSfigKey{6200-f20.eps}{GSC 5991-1727}{finding chart}
light curve, \IBVSefigure{6200-f21.eps}
\IBVSifigure{6200-f21}
\IBVSfigKey{6200-f21.eps}{GSC 5991-1727}{light curve}
data file \IBVSedata{6200-t10.txt}
\IBVSdataKey{6200-t10.txt}{GSC 5991-1727}{photometry}
}{10}
Remark: Detected on 19 February 2014 in the FoV of TY Pup. Epoch refers to maximum light.
\IBVSnstar{
07 32 44.65 }
{ $-$20 43 11.6 }
{DSCT}
{ 11.48 ($V_{\rm T}$ -TYC2)}
{0.04954(5)}
{ 2456719.3069(2) }
{ GSC 5991-1865 = TYC 5991-1865-1 }
{finding chart, \IBVSefigure{6200-f22.eps}
\IBVSfigKey{6200-f22.eps}{GSC 5991-1865}{finding chart}
light curve, \IBVSefigure{6200-f23.eps}
\IBVSifigure{6200-f23}
\IBVSfigKey{6200-f23.eps}{GSC 5991-1865}{light curve}
data file \IBVSedata{6200-t11.txt}
\IBVSdataKey{6200-t11.txt}{GSC 5991-1865}{photometry}
}{11}
Remark: Detected on 2 March 2014 in the FoV of TY Pup. Epoch refers to maximum light.
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\IBVSnews{10 June 2015}
{Karampotsiou, E. - Department of Astrophysics, Astronomy and Mechanics, National and Kapodistrian University of Athens, GR 15784, Zografos, Athens, Greece, sevi.kar@gmail.com\\%email
Gazeas, K. - Department of Astrophysics, Astronomy and Mechanics, National and Kapodistrian University of Athens, GR 15784, Zografos, Athens, Greece, kgaze@phys.uoa.gr\\%email
}{7}
\IBVSnstar{
19 08 03.875 }
{ +37 53 59315 }
{EW}
{ 15.0 (Rmag - USNO-A2.0)}
{ 0.2812(3) }
{ 2457155.419(1) }
{ USNO-A2.0 1275-10813091 = GSC2.2 N030320212363 = 2MASS 19080387+3753591 = SDSS J190803.87+375359.1 = KIC 2557987 }
{finding chart, \IBVSefigure{6200-f24.eps}
\IBVSfigKey{6200-f24.eps}{USNO-A2.0 1275-10813091}{finding chart}
light curve, \IBVSefigure{6200-f25.eps}
\IBVSifigure{6200-f25}
\IBVSfigKey{6200-f25.eps}{USNO-A2.0 1275-10813091}{light curve}
data file \IBVSedata{6200-t12.txt}
\IBVSdataKey{6200-t12.txt}{USNO-A2.0 1275-10813091}{photometry}
}{12}
Remark: Detected on 12th May 2015 in the FoV of KIC 2835289. Differential magnitudes are given with respect to a sum of several comparison stars in the field.
\IBVSnstar{
19 08 00.309 }
{ +38 01 57.20 }
{EW}
{ 15.4 (Rmag - USNO-A2.0) }
{ 0.3974(3) }
{ 2457155.484(1) }
{ USNO-A2.0 1275-10811543 = GSC2.2 N030320219127 = 2MASS 19080032+3801570 = SDSS J190800.33+380157.1 = KIC 2835711 }
{finding chart, \IBVSefigure{6200-f26.eps}
\IBVSfigKey{6200-f26.eps}{USNO-A2.0 1275-10811543}{finding chart}
light curve, \IBVSefigure{6200-f27.eps}
\IBVSifigure{6200-f27}
\IBVSfigKey{6200-f27.eps}{USNO-A2.0 1275-10811543}{light curve}
data file \IBVSedata{6200-t13.txt}
\IBVSdataKey{6200-t13.txt}{USNO-A2.0 1275-10811543}{photometry}
}{13}
Remark: Detected on 12th May 2015 in the FoV of KIC 2835289. Differential magnitudes are given with respect to a sum of several comparison stars in the field.
\IBVSnstar{
19 07 19.580 }
{ +37 55 15.74 }
{ EW }
{ 16.0 (Rmag - USNO-A2.0) }
{ 0.2850(3) }
{ 2457155.506(1) }
{ USNO-A2.0 1275-10794124 = GSC2.2 N030320213311 = 2MASS 19071959+3755155 = SDSS J190719.58+375515.6 = KIC 2696006 }
{finding chart, \IBVSefigure{6200-f28.eps}
\IBVSfigKey{6200-f28.eps}{USNO-A2.0 1275-10794124}{finding chart}
light curve, \IBVSefigure{6200-f29.eps}
\IBVSifigure{6200-f29}
\IBVSfigKey{6200-f29.eps}{USNO-A2.0 1275-10794124}{light curve}
data file \IBVSedata{6200-t14.txt}
\IBVSdataKey{6200-t14.txt}{USNO-A2.0 1275-10794124}{photometry}
}{14}
Remark: Detected on 12th May 2015 in the FoV of KIC 2835289. Differential magnitudes are given with respect to a sum of several comparison stars in the field.
\IBVSnstar{
19 07 05.799 }
{ +37 54 34.77 }
{ EW }
{ 16.4 (Rmag - USNO-A2.0) }
{ 0.2921(6) }
{ 2457155.539(2) }
{ USNO-A2.0 1275-10788218 = GSC2.2 N030320212746 = 2MASS 19070579+3754343 = SDSS J190705.80+375434.3 = KIC 2695854 }
{finding chart, \IBVSefigure{6200-f30.eps}
\IBVSfigKey{6200-f30.eps}{USNO-A2.0 1275-10788218}{finding chart}
light curve, \IBVSefigure{6200-f31.eps}
\IBVSifigure{6200-f31}
\IBVSfigKey{6200-f31.eps}{USNO-A2.0 1275-10788218}{light curve}
data file \IBVSedata{6200-t15.txt}
\IBVSdataKey{6200-t15.txt}{USNO-A2.0 1275-10788218}{photometry}
}{15}
Remark: Detected on 12th May 2015 in the FoV of KIC 2835289. Differential magnitudes are given with respect to a sum of several comparison stars in the field.
\IBVSnstar{
19 08 09.638 }
{ +37 56 16.85 }
{ EW }
{ 16.1 (Rmag - USNO-A2.0) }
{ 0.2691(8) }
{ 2457155.556(1) }
{ USNO-A2.0 1275-10815489 = GSC2.2 N030320214179 = 2MASS 19080965+3756163 = SDSS J190809.64+375616.3 = KIC 2696645 }
{finding chart, \IBVSefigure{6200-f32.eps}
\IBVSfigKey{6200-f32.eps}{USNO-A2.0 1275-10815489}{finding chart}
light curve, \IBVSefigure{6200-f33.eps}
\IBVSifigure{6200-f33}
\IBVSfigKey{6200-f33.eps}{USNO-A2.0 1275-10815489}{light curve}
data file \IBVSedata{6200-t16.txt}
\IBVSdataKey{6200-t16.txt}{USNO-A2.0 1275-10815489}{photometry}
}{16}
Remark: Detected on 12th May 2015 in the FoV of KIC 2835289. Differential magnitudes are given with respect to a sum of several comparison stars in the field.
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\IBVSnews{10 November 2015}
{Gazeas, K. - Department of Astrophysics, Astronomy and Mechanics, National and Kapodistrian University of Athens, GR 15784, Zografos, Athens, Greece, kgaze phys.uoa.gr \\%email
}{8}
\IBVSnstar{
20 32 24.06}
{+05 16 28.1 }
{EW}
{ 7.9(Vmag-USNO-A2.0)}
{ 0.3682(1) }
{ 2456495.6525(9) }
{ HD 195634 = GSC 0518-1033 = SAO 125914 = 2MASS J20322406+0516281 = USNO-A2.0 0900-18660708 }
{finding chart, \IBVSefigure{6200-f34.eps}
\IBVSfigKey{6200-f34.eps}{HD 195634}{finding chart}
light curve, \IBVSefigure{6200-f35.eps}
\IBVSifigure{6200-f35}
\IBVSfigKey{6200-f35.eps}{HD 195634}{light curve}
data file \IBVSedata{6200-t17.txt}
\IBVSdataKey{6200-t17.txt}{HD 195634}{photometry}
}{17}
Remark: Detected 21 July 2013 in the FoV of MR Del.
\IBVSnstar{
06 03 37.68 }
{+27 35 11.4}
{EW}
{ 12.9(Rmag - USNO A2.0)}
{ 0.50316(2) }
{ 2456401.2640(9) }
{ 2MASS J06033762+2735111 = USNO-A2.0 1125-03275240 = GSC N22213109574 = USNO-B1.0 1175-0139046 }
{finding chart, \IBVSefigure{6200-f36.eps}
\IBVSfigKey{6200-f36.eps}{2MASS J06033762+2735111}{finding chart}
light curve, \IBVSefigure{6200-f37.eps}
\IBVSifigure{6200-f37}
\IBVSfigKey{6200-f37.eps}{2MASS J06033762+2735111}{light curve}
data file \IBVSedata{6200-t18.txt}
\IBVSdataKey{6200-t18.txt}{2MASS J06033762+2735111}{photometry}
}{18}
Remark: Detected 12 November 2012 in the FoV of BG Gem.
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\IBVSnews{9 May 2016}
{Liska, J. - Department of Theoretical Physics and Astrophysics, Masaryk University, Kotlarska 2, 611 37 Brno, Czech Republic, jiriliska@post.cz \\%email
Janik, J. - Department of Theoretical Physics and Astrophysics, Masaryk University, Kotlarska 2, 611 37 Brno, Czech Republic, honza@physics.muni.cz \\%email
Zejda, M. - Department of Theoretical Physics and Astrophysics, Masaryk University, Kotlarska 2, 611 37 Brno, Czech Republic, zejda@physics.muni.cz \\%email
}{9}
\IBVSnstar{
14 09 07.15}
{-45 18 18.0 }
{probably RR Lyrae star of RRab type}
{ 17.35(2) mag (R) = mean V-C value + USNO R magnitude of Comparison star}
{ - }
{ 2457478.771(2) HJD (maximum) }
{ CzeV843 Cen }
{finding chart, \IBVSefigure{6200-f38.eps}
\IBVSfigKey{6200-f38.eps}{CzeV843 Cen}{finding chart}
light curve, \IBVSefigure{6200-f39.eps}
\IBVSifigure{6200-f39}
\IBVSfigKey{6200-f39.eps}{CzeV843 Cen}{light curve}
data file \IBVSedata{6200-t19.txt}
\IBVSdataKey{6200-t19.txt}{CzeV843 Cen}{photometry}
}{19}
Remark: Variability detected 31 March 2016 in the FOV of V834 Cen. The CzeV843 Cen is in the vicinity (about 3.5 arcsec) of a star USNO-A2 0375-20155518 with similar brightness (CzeV843 Cen is about 0.3 mag fainter in R-band). Therefore, it is a blend for many of sky surveys. Observations were performed with the Danish 1.54-m telescope at La Silla, Chile in two nights. Another information is present in the CzeV catalogue http://var2.astro.cz/czev.php. Possible pulsation period can be 0.43 or 0.64 d.
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\IBVSnews{12 September 2016}
{
Essam, A. - Astronomy Department, National Research Institute of Astronomy and Geophysics (NRIAG), 11421 Helwan, Egypt, essam60@yahoo.com \\%email
El-Sadek, M. A. - Astronomy Department, NRIAG, 11421 Helwan, Egypt \\
Shokry, A. - Astronomy Department, NRIAG, 11421 Helwan, Egypt \\
Darwish, M. S. - Astronomy Department, NRIAG, 11421 Helwan, Egypt \\
}{10}
\IBVSnstar{
20 00 59.917}
{+05 44 11.93 }
{EW}
{ 14.807-15.348 }
{ 0.20569\,d }
{ 2457602.5177$\pm$0.0010 }
{ UCAC4 479-113658 = 2MASS J20005992+0544120 = GSC2.3 N1Y0035356 }
{finding chart, \IBVSefigure{6200-f40.eps}
\IBVSfigKey{6200-f40.eps}{UCAC4 479-113658}{finding chart}
light curve, \IBVSefigure{6200-f41.eps}
\IBVSifigure{6200-f41}
\IBVSfigKey{6200-f41.eps}{UCAC4 479-113658}{light curve}
data file \IBVSedata{6200-t20.txt}
\IBVSdataKey{6200-t20.txt}{UCAC4 479-113658}{photometry}
}{20}
Remark: All the observations have been carried out by using the EEV CCD 42-40 camera with a format of 2048$\times$2048 pixels, cooled by liquid nitrogen attached on the Newtonian focus of the 1.88-m Kottamia reflector telescope in Egypt.\\
the location of Kottamia Astronomical Observatory (KAO) as follows:\\
Latitude: 29\deg 56\arcm 02\farcs43 N\\
Longitude: 31\deg 49\arcm 40\farcs10 E\\
Height: 467 m\\
International code = 088 \\
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\IBVSnews{12 September 2016}
{
El-Sadek, M. A. - Astronomy Department, National Research Institute of Astronomy and Geophysics (NRIAG), 11421 Helwan, Egypt,\\
Essam, A. - Astronomy Department, NRIAG, 11421 Helwan, Egypt, essam60@yahoo.com \\%email
Shokry, A. - Astronomy Department, NRIAG, 11421 Helwan, Egypt \\
Saad, S. - Astronomy Department, NRIAG, 11421 Helwan, Egypt \\
Darwish, M. S. - Astronomy Department, NRIAG, 11421 Helwan, Egypt \\
}{11}
\IBVSnstar{
20 01 07.694}
{+05 42 21.68 }
{EW}
{ 16.07-16.52}
{ 0.35292\,d }
{ 2457604.4082$\pm$0.0006}
{ UCAC4 479-113711 = 2MASS J20010770+0542216 = USNO-B1.0 0957-0508120 }
{finding chart, \IBVSefigure{6200-f42.eps}
\IBVSfigKey{6200-f42.eps}{UCAC4 479-113711}{finding chart}
light curve, \IBVSefigure{6200-f43.eps}
\IBVSifigure{6200-f43}
\IBVSfigKey{6200-f43.eps}{UCAC4 479-113711}{light curve}
data file \IBVSedata{6200-t21.txt}
\IBVSdataKey{6200-t21.txt}{UCAC4 479-113711}{photometry}
}{21}
Remark: All the observations have been carried out by using the EEV CCD 42-40 camera with a format of 2048$\times$2048 pixels, cooled by liquid nitrogen attached on the Newtonian focus of the 1.88-m Kottamia reflector telescope in Egypt.\\
the location of Kottamia Astronomical Observatory (KAO) as follows:\\
Latitude: 29\deg 56\arcm 02\farcs43 N\\
Longitude: 31\deg 49\arcm 40\farcs10 E\\
Height: 467 m\\
International code = 088 \\
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\IBVSnews{6 October 2016}
{Csizmadia, Sz. - Deutsches Zentrum f\"ur Luft- und Raumfahrt, Institut f\"ur Planetenforschung, D-12489 Berlin, Rutherfordstrasse 2., Germany, szilard.csizmadia@dlr.de \\%email
Sedaghati, E. - Deutsches Zentrum f\"ur Luft- und Raumfahrt, Institut f\"ur Planetenforschung, D-12489 Berlin, Rutherfordstrasse 2., Germany; European Southern Observatory, Karl-Schwarzschild-Strasse 2, D-85748 Garching bei M\"unchen, Germany; Zentrum f\"ur Astronomie und Astrophysik, TU Berlin, Hardenbergstr. 36, 10623 Berlin, Germany, esedagha@eso.org \\%email
Boffin, H. M. J. - European Southern Observatory, Karl-Schwarzschild-Strasse 2, D-85748 Garching bei M\"unchen, Germany, hboffin@eso.org \\%email
}{12}
\IBVSnstar{
09 53 42.692 }
{-45 43 15.95 }
{ $\delta$ Scuti }
{ V = 13.67 mag }
{ $\sim$0.1\,d }
{ 2457418.705 }
{ 2MASS 09534278-4543166 }
{finding chart, \IBVSefigure{6200-f44.eps}
\IBVSfigKey{6200-f44.eps}{2MASS 09534278-4543166}{finding chart}
light curve, \IBVSefigure{6200-f45.eps}
\IBVSifigure{6200-f45}
\IBVSfigKey{6200-f45.eps}{2MASS 09534278-4543166}{light curve}
data file (B) \IBVSedata{6200-t22.txt}
\IBVSdataKey{6200-t22.txt}{2MASS 09534278-4543166}{photometry}
data file (z) \IBVSedata{6200-t23.txt}
\IBVSdataKey{6200-t23.txt}{2MASS 09534278-4543166}{photometry}
}{22}
Remark: The target was a comparison-star candidate for the spectrophotometric
observations of two transits of WASP-19b. Although the differential light curve of the comparison -- check star shows some
airmass-effect, the variability of 2MASS 09534278-4543166 is clearly visible on both nights when we observed it.
The peak-to-peak amplitude is 0.04 magnitude and a main period of $\sim$0.1 days can be suspected. The $J-K$
colour index is 0.217 (based on the 2MASS Point Source Catalogue). Neglecting interstellar reddening, this
corresponds approximately $\sim$F3 spectral type. The period, the colour index and overall light curve shape suggest a
$\delta$ Scuti type variable. The object is not listed as a known variable star in GCVS, Catalina Survey or
VSX as of the submission date of this note. Figure 1 shows the observed light curve. Notice that the star has a close
companion (Fig. 44) and because we did spectroscopic observations with FORS2 (and then we obtained spectrophotometric light
curves convolving the spectra with different filter functions) and since the the companion was in the same
aperture as the target star, we cannot decide whether the brighter or the fainter star is the variable,
but we suspect that brighter one produces the observed light-variation.
Fig. 45. - The light curve of the variable star with solid line on the nights 30 January 2016 (JD 2 457 418)
and 29 February 2016 (JD 2 457 448). The dashed curves show the differential light curves of the comparison and the check star.
The plotted differential magnitude-curves were shifted by some constant values for sake of clarity.
Acknowledgements: Sz. Cs. acknowledges the Hungarian OTKA Grant K113117.
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\reference
Liakos, A., Niarchos, P., 2010, IBVS, 5998, 3
\endreferences
\end{document}