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\input ibvsn.sty
\input ibvs2.sty

\begin{document}

\IBVShead{5900}{24 August 2009}

\IBVStitle{Reports on New Discoveries}

\IBVSabs{List of newly discovered variables.}

\begintext

The last issue of the volume publishes a list of newly discovered variables.
Figures (finding charts and light curves) and data files are available
electronically. Previous reports can be found in IBVS 5700. 
\IBVSshortlink{http://www.konkoly.hu/cgi-bin/IBVS?5700}{IBVS No. 5700}

\bigskip
\bigskip

The Editors

\bigskip


\IBVSnews{24 October 2007}
{
Tiwari, S.K. - Aryabhatta Research Institute of Observational Sciences, Manora Peak, Nainital - 263129, India \\
Chaubey, U.S. - Aryabhatta Research Institute of Observational Sciences, Manora Peak, Nainital - 263129, India\\
Pandey, C.P. - Aryabhatta Research Institute of Observational Sciences, Manora Peak, Nainital - 263129, India\\
}{1}

HD 103498 is an A1 type magnetic star having surface
magnetic field of about 2.5 kG and shows the lines of Sr, Eu and Cr in
its spectrum (Cramer \& Maeder, 1980). The Str\"{o}mgren indices of
HD 103498 are b-y = 0.003, m$_1$ = 0.196, c$_1$ = 1.010 and $\beta$ =
2.858, (Hauck \& Mermilliod, 1998). We observed this star on four
nights between March and April 2007 with 104-cm telescope of ARIES
Nainital, equipped with high-speed fast photometer and discovered
15-min oscillations. The observational and data reduction procedures
are available in Tiwari, Chaubey \& Pandey (2007).

The nightly observed mean amplitude of the oscillations are different 
from each other. The amplitude modulation may be due to either excitation 
of different modes or rotation of the star or both. 

Acknowledgements: Dr. B.J. Medhi; 
DST Govt. of India, Grant No. SR/S2/HEP-20/2003.

\SIMBADobj{HD 103498}
\IBVSnstar{
11 55 11.33}
{ +46 28 11.21}
{ DSCT }
{ 7.026}
{ 15.2 m}
{-}
{HD 103498 = BD +47 1914}
{
light curve, \IBVSefigure{5900-f1.ps} 
\IBVSfigKey{5900-f1.ps}{HD 103498}{light curve}
amplitude spectrum, \IBVSefigure{5900-f2.ps} 
\IBVSfigKey{5900-f2.ps}{HD 103498}{periodogram}
data file \IBVSedata{5900-t1.txt}
\IBVSdataKey{5900-t1.txt}{HD 103498}{photometry}
}{1}

\IBVSnews{12 November 2007}
{
Liakos, A. - Dept. of Astrophysics, Astronomy and Mechanics, Faculty of Physics, National \& Kapodistrian University of Athens, Athens, Greece, alliakos@phys.uoa.gr\\ %email
Niarchos, P. - Dept. of Astrophysics, Astronomy and Mechanics, Faculty of Physics, National \& Kapodistrian University of Athens, Athens, Greece, pniarcho@phys.uoa.gr\\ %email
%Corrected Thu Sep 17 13:05:49 MEST 2009
}{2}


\SIMBADobj{GSC 4589-2999}
\IBVSnstar{
20 15 00.22}
{ +76 54 18.28}
{ EA }
{ 10.59 V (GSC)}
{1.688778389d}
{2454377.38222 }
{GSC 4589-2999}
{
finding chart, \IBVSefigure{5900-f3.ps}
\IBVSfigKey{5900-f3.ps}{GSC 4589-2999}{finding chart}
light curve, \IBVSefigure{5900-f4.ps} 
\IBVSfigKey{5900-f4.ps}{GSC 4589-2999}{light curve}
data file \IBVSedata{5900-t2.txt}
\IBVSdataKey{5900-t2.txt}{GSC 4589-2999}{photometry}
}{2}

\IBVSnews{12 November 2007}
{
Zhang, X.B. - National Astronomical Observatories, Chinese Academy of Sciences, Beijing, 100012, China, xzhang@bao.ac.cn \\ %email
Luo, C.Q. - Dept. of Physics, China West Normal University, Sichuan, 637002, China \\
Luo, Y.P. - Dept. of Physics, China West Normal University, Sichuan, 637002, China \\
Deng, L.C. - National Astronomical Observatories, Chinese Academy of Sciences, Beijing, 100012, China, licai@bao.ac.cn \\ %email
}{3}

The new variable is a certain member of the intermediate age open 
cluster NGC752 (Platais, 1991). 

\SIMBADobj{NGC 752 170}
\IBVSnstar{
01 57 17.29}
{ +37 40 51.6}
{ E }
{13.10 (V) }
{- }
{- }
{NGC 752 170 = Cl* NGC 752 Stock 239 = Cl* NGC 752 PLA 758}
{
finding chart, \IBVSefigure{5900-f5.ps}
\IBVSfigKey{5900-f5.ps}{NGC 752 170}{finding chart}
light curve, \IBVSefigure{5900-f6.ps} 
\IBVSfigKey{5900-f6.ps}{NGC 752 170}{light curve}
light curve, \IBVSefigure{5900-f7.ps} 
\IBVSfigKey{5900-f7.ps}{NGC 752 170}{light curve}
data file, \IBVSedata{5900-t3.txt}
\IBVSdataKey{5900-t3.txt}{NGC 752 170}{photometry}
data file \IBVSedata{5900-t4.txt}
\IBVSdataKey{5900-t4.txt}{NGC 752 170}{photometry}
}{3}


\IBVSnews{13 December 2007}
{
Agerer, F. - Bundesdeutsche Arbeitsgemeinschaft f\"ur ver\"aderliche Sterne e.V., Munsterdamm 90, D-12169 Berlin, Germany, agerer.zweik@t-online.de \\ %email
}{4}

Remark: In the field of V941 Cyg

\IBVSnstar{
19 41 29.36 }
{ +30 51 19.6 }
{EA }
{12.93 (r USNO-B-1.0) }
{1.125815 d }
{2453611.435 }
{GSC 2656-4286 = USNO-B-1.0 1208-0386457 }
{finding chart, \IBVSefigure{5900-f8.ps}
\IBVSfigKey{5900-f8.ps}{GSC 2656-4286}{finding chart}
light curve, \IBVSefigure{5900-f9.ps}
\IBVSfigKey{5900-f9.ps}{GSC 2656-4286}{light curve}
data file \IBVSedata{5900-t5.txt}
\IBVSdataKey{5900-t5.txt}{GSC 2656-4286}{photometry}
}{4}


\IBVSnews{9 January 2008}
{
Agerer, F. - Bundesdeutsche Arbeitsgemeinschaft f\"ur ver\"anderliche Sterne e.V. (BAV), Munsterdamm 90, D-12169 Berlin, Germany, agerer.zweik@t-online.de \\ %email
}{5}

Remark: South-east of OR Cas (very close).

\IBVSnstar{
00 48 03.78 }
{ 60 51 28.5 }
{EW }
{13.64 (USNO-B1.0 R2mag) }
{0.318004 d }
{2454002.631 (Min I) }
{USNO-B1.0 1508-0029126 }
{finding chart, \IBVSefigure{5900-f10.ps}
\IBVSfigKey{5900-f10.ps}{USNO-B1.0 1508-0029126}{finding chart}
light curve, \IBVSefigure{5900-f11.ps}
\IBVSfigKey{5900-f11.ps}{USNO-B1.0 1508-0029126}{light curve}
data file \IBVSedata{5900-t6.txt}
\IBVSdataKey{5900-t6.txt}{USNO-B1.0 1508-0029126}{photometry}
}{5}

Remark: In the field of V459 Cas. Already published by Brat (2006), but no period was given there.

\IBVSnstar{
01 11 08.89 }
{ 61 07 45.1 }
{EW }
{14.45 (USNO-B1.0 R1mag) }
{0.302240 }
{2454092.275 (Min I) }
{USNO-B1.0 1511-0041416 = 2MASS J01110892+6107448 = LBvar010 Cas}
{finding chart, \IBVSefigure{5900-f12.ps}
\IBVSfigKey{5900-f12.ps}{USNO-B1.0 1511-0041416}{finding chart}
light curve, \IBVSefigure{5900-f13.ps}
\IBVSfigKey{5900-f13.ps}{USNO-B1.0 1511-0041416}{light curve}
data file \IBVSedata{5900-t7.txt}
\IBVSdataKey{5900-t7.txt}{USNO-B1.0 1511-0041416}{photometry}
}{6}


\IBVSnews{14 January 2008}
{
Violat-Bordonau, Francisco - Caceres Astronomical Observatory, E10080, Caceres, Spain, fviolat@yahoo.es \\ %email
Arranz-Heras, Teofilo - "Las Pegueras" Observatotory, Navas de Oro, Segovia, Spain \\ 
}{6}

Remark: BD +36 3317 is an A5 type star (Anthony-Twarog, 1984) located in the 
open cluster Stephenson 1, near the Delta2 Lyrae variable. 

\IBVSnstar{
18 54 22.23 }
{ 36 51 07.4 }
{EA }
{8.77 V (SIMBAD)}
{4.30216 d }
{2454437.25921 (Min I) }
{BD +36 3317 = SAO 67556 = TYC 2651-802-1 }
{finding chart, \IBVSefigure{5900-f14.ps}
\IBVSfigKey{5900-f14.ps}{BD +36 3317}{finding chart}
light curve, \IBVSefigure{5900-f15.ps}
\IBVSfigKey{5900-f15.ps}{BD +36 3317}{light curve}
light curve, \IBVSefigure{5900-f16.ps}
\IBVSfigKey{5900-f16.ps}{BD +36 3317}{light curve}
data file \IBVSedata{5900-t8.txt}
\IBVSdataKey{5900-t8.txt}{BD +36 3317}{photometry}
}{7}

\IBVSnews{15 January 2008}
{
Schuster, W.J. - Institute of Astronomy/Observatorio Astron\'omico Nacional, Universidad Nacional Aut\'onoma de M\'exico, P.O. Box 439027, San Diego, CA, 92143-9027, U.S.A., schuster@astrosen.unam.mx \\ %email
Ochoa, J. - Institute of Astronomy/Observatorio Astron\'omico Nacional, UNAM, chico@astrosen.unam.mx \\ %email
Zurita, C. - Institute of Astronomy/Observatorio Astron\'omico Nacional, UNAM, czurita@astrosen.unam.mx \\ %email
Fox Machado, L. - Institute of Astronomy/Observatorio Astron\'omico Nacional, UNAM, lfox@astrosen.unam.mx \\ %email
}{7}

\SIMBADobj{HD 207331}

Remark: On the night of 26 September 2007 UT differential $uvby$ photometry
of two AO-type stars was carried out at the 1.5m telescope of the 
San Pedro M\'artir Observatory, and HD~207331 proved to be variable
(see 5900-f18).
Confirming CCD observations were carried out on the night of 30~September 
2007 UT at the 84cm telescope of the same observatory, and the light curve 
suggests strongly that this variable star is of the $\delta$~Scuti type
with a period of about 1.17 hour (see 5900-f19). 
The position of this star in the $M_v$,$(B-V)$ diagram also confirms this 
classification (see 5900-f21). 

The staff of the San Pedro M\'artir Observatory, Baja Californ
ia, M\'exico, is gratefully thanked.

\IBVSnstar{
21 47 02.32 }
{ 43 19 18.6 }
{ DSCT }
{8.51 (B) }
{0.04875 d }
{- }
{HD 207331 = BD+ 42 4207 = HIP 107557 }
{finding chart, \IBVSefigure{5900-f17.ps}
\IBVSfigKey{5900-f17.ps}{HD 207331}{finding chart}
light curve, \IBVSefigure{5900-f18.ps}
\IBVSfigKey{5900-f18.ps}{HD 207331}{light curve}
light curve, \IBVSefigure{5900-f19.ps}
\IBVSfigKey{5900-f19.ps}{HD 207331}{light curve}
Fourier spectrum, \IBVSefigure{5900-f20.ps}
\IBVSfigKey{5900-f20.ps}{HD 207331}{periodogram}
color-magnitude diagram, \IBVSefigure{5900-f21.ps}
\IBVSfigKey{5900-f21.ps}{HD 207331}{color-magnitude diagram}
\IBVSecomment{Shows the position of HD 207331 (the "x") in a 
color-magnitude diagram and its associated uncertainty (the cross).
The observed position of the star was taken from the Hipparcos catalogue. An
evolutionary track of 2.25 $M_{\odot}$, computed with a metallicity of Z=0.03, 
is shown by the continuous line.  HD 207331 is located within the $\delta$
Scuti instability strip, the dotted lines "BE" and "RE".}\break
data file \IBVSedata{5900-t9.txt}
\IBVSdataKey{5900-t9.txt}{HD 207331}{photometry}
}{8}

\IBVSnews{26 February 2008}
{
DeGennaro, S.  - University of Texas at Austin \\ 
Williams, K.   - University of Texas at Austin \\
Montgomery, M. - University of Texas at Austin \\ 
}{8}

Remark: This object may represent a new class of variable star: the pulsating 
carbon atmosphere white dwarf, or DQV. The object found to pulsate with a single
mode at 417.76 +/- 0.35 s with an amplitude of 1.7%.

The object was observed for 5 and ~3 hours on two consecutive nights using 
the Argos high-speed photometer on the 2.1m Otto Struve reflector at McDonald 
Observatory. The period and amplitude were found to be stable between the two 
observations.

The figures show the light curves obtained for the two nights, smoothed by 
a Gaussian with a sigma of 1.25 observations (37.5 s), and the combined
Fourier transform of the two data sets.

\IBVSnstar{
14 26 25.7 }
{ +57 52 18.4 }
{ DQV(?) }
{19.16 (g) }
{417.76 s }
{- }
{SDSS J142625.71+575218.3 }
{finding chart, \IBVSefigure{5900-f22.ps}
\IBVSfigKey{5900-f22.ps}{SDSS J142625.71+575218.3}{finding chart}
light curve, \IBVSefigure{5900-f23.eps}
\IBVSfigKey{5900-f23.eps}{SDSS J142625.71+575218.3}{light curve}
Fourier spectrum, \IBVSefigure{5900-f24.eps}
\IBVSfigKey{5900-f24.eps}{SDSS J142625.71+575218.3}{periodogram}
data file \IBVSedata{5900-t10.txt}
\IBVSdataKey{5900-t10.txt}{SDSS J142625.71+575218.3}{photometry}
}{9}


\IBVSnews{11 March 2008}
{
Cook, S.P. - 332 Weed Road, Weed, NM 88354-0499, USA \\ 
}{9}

\SIMBADobj{BD +48 1098}

Remark: This early-type, high luminosity emission line star (15' NE of 
Cepheid BM Persei) is an eclipsing binary (beta Lyr type?).
Minima times were determined by Kwee and van Woerden (1956) method, and
the period was determined by weighted least squares fitting of three
best observed minima (Belserene, 1988a) and using DFT (Belserene, 1988b)
on NSVS data (Wozniak et al., 2004).

\IBVSnstar{
04 28 39.623 }
{ 48 35 55.03 }
{EB? }
{9.72 V (GSC) }
{21.65 d }
{2454516.1 }
{BD +48 1098 = GSC 3333-1755 = PPM 47103 = ALS 7963 = NSVS 4287647 = NSVS 4265168 }
{finding chart, \IBVSefigure{5900-f25.ps}
\IBVSfigKey{5900-f25.ps}{BD +48 1098}{finding chart}
light curve, \IBVSefigure{5900-f26.ps}
\IBVSfigKey{5900-f26.ps}{BD +48 1098}{light curve}
light curve, \IBVSefigure{5900-f27.ps}
\IBVSfigKey{5900-f27.ps}{BD +48 1098}{light curve}
data file \IBVSedata{5900-t11.txt}
\IBVSdataKey{5900-t11.txt}{BD +48 1098}{photometry}
}{10}


\IBVSnews{9 September 2008}
{
Liakos, A. - National and Kapodistrian Univ. of Athens, Dept. of Astrophysics, Astronomy and Mechanics, alliakos@phys.uoa.gr \\ %email
Niarchos, P. - National and Kapodistrian Univ. of Athens, Dept. of Astrophysics, Astronomy and Mechanics, pniarcho@phys.uoa.gr \\ %email
}{10}

\IBVSnstar{
23 35 50 }
{ 48 43 43 }
{DSCT }
{11.3 (GSC V) }
{0.112625 d }
{- }
{GSC 3641-0359 = 2MASS	23355022+4843428 }
{finding chart, \IBVSefigure{5900-f28.eps}
\IBVSfigKey{5900-f28.ps}{GSC 3641-0359}{finding chart}
light curve, \IBVSefigure{5900-f29.eps}
\IBVSfigKey{5900-f29.ps}{GSC 3641-0359}{light curve}
Fourier spectrum, \IBVSefigure{5900-f30.eps}
\IBVSfigKey{5900-f30.ps}{GSC 3641-0359}{periodogram}
light curve fitting, \IBVSefigure{5900-f31.eps}
\IBVSfigKey{5900-f31.ps}{GSC 3641-0359}{light curve}
data file \IBVSedata{5900-t12.txt}
\IBVSdataKey{5900-t12.txt}{GSC 3641-0359}{photometry}
}{11}


\IBVSnstar{
19 54 39.5 }
{ 32 56 02.7 }
{DSCT }
{10.8 (GSC V) }
{0.0997415 d }
{- }
{GSC 2673-1583 = 2MASS 19543947+3256027}
{finding chart, \IBVSefigure{5900-f32.eps}
\IBVSfigKey{5900-f32.ps}{GSC 2673-1583}{finding chart}
light curve, \IBVSefigure{5900-f33.eps}
\IBVSfigKey{5900-f33.ps}{GSC 2673-1583}{light curve}
Fourier spectrum, \IBVSefigure{5900-f34.eps}
\IBVSfigKey{5900-f34.ps}{GSC 2673-1583}{periodogram}
light curve fitting, \IBVSefigure{5900-f35.eps}
\IBVSfigKey{5900-f35.ps}{GSC 2673-1583}{light curve}
data file \IBVSedata{5900-t13.txt}
\IBVSdataKey{5900-t13.txt}{GSC 2673-1583}{photometry}
}{12}


\IBVSnews{29 January 2009}
{
Monninger, G. - Bundesdeutsche Arbeitsgemeinschaft f\"ur ver\"anderliche Sterne e.V. (BAV), Munsterdamm 90, DE-12169 Berlin, Germany, gerold.monninger@online.de\\ %email
}{11}

Remark: In the field of GSC 3377-0296, an RS CVn variable (Lloyd et al., 2007).

\IBVSnstar{
06 39 48.8 }
{ 46 57 15.1 }
{DSCT }
{14.18 (R1mag - USNO B1.0) }
{0.104430 d }
{2454840.4195 }
{USNO-B1.0 1369-0180384 }
{finding chart, \IBVSefigure{5900-f36.ps}
\IBVSfigKey{5900-f36.ps}{USNO-B1.0 1369-0180384}{finding chart}
light curve, \IBVSefigure{5900-f37.ps}
\IBVSfigKey{5900-f37.ps}{USNO-B1.0 1369-0180384}{light curve}
data file \IBVSedata{5900-t14.txt}
\IBVSdataKey{5900-t14.txt}{USNO-B1.0 1369-0180384}{photometry}
}{13}


\references

Anthony-Twarog, B.J., 1984, {\it AJ}, {\bf 89}, 655

Brat, L., 2006, {\it OEJV}, {\bf 23}, 67

Belserene, E., 1988a, {\it JAAVSO,} {\bf 17,} 123

Belserene, E., 1988b, {\it Sky and Telescope,} {\bf 76,} 288

Cramer, N., Maeder, A., 1980, {\it A\&AS}, {\bf 41}, 111

Hauck, B., Mermilliod, M., 1998, {\it A\&AS}, {\bf 129}, 431

Kwee, K. K., van Woerden, H., 1956, {\it B.A.N.}, {\bf 12}, 327-330

Lloyd, C.; Bernhard, K.; Monninger, G., 2007, {\it IBVS}, 5772

Platais, I., 1991, {\it A\&AS}, {\bf 87}, 69

Tiwary, S.K., Chaubey, U.S., Pandey,C.P., 2007, {\it IBVS}, 5787

Wozniak, P.R., et al., 2004, {\it Astron. J.}, {\bf 127}, 2436

\endreferences

\IBVSerratum{5700}

The epoch reported in IBVS 5700 for GSC 3355-0394 should be 2451537.61909 .


\end{document}
