Astronomical and geophysical observatory in Modra, Slovakia

Main menu

Search

Info about the observatory

Address:

Astronomical observatory
P.O.Box 4
900 01 Modra
Slovakia
tel.: +421 336475261

Longitude:

17°,27402056 E

Latitude:

48°,37327278 N

Altitude:

531.10 m

MPC code:

118

Exoplanets

The AGO observers attempted to observe transiting exoplanet for several times. While photometry of the exoplanet transits does not belong to our main observational program, the atmospheric and observational conditions are not ideal for our main belt asteroid photometry program, therefore our 0.60-m Cassegrain type telescope with the Ap8 CCD camera can be aimed at some of the transiting exoplanets. In addition to the transit alone we observe the part of the lightcurve approximately an hour before and after the predicted first and last contact. Photometric data are processed in the MaxIm DL software (photometry and calibration for the flat field, dark and bias) or in the own photometric program (image calibration in IRAF, photometric processing in the software created within the dissertation thesis by Világi, 2007).

Despite the relatively large number of transiting exoplanets, our equipment allows us to observe transits with a deep magnitude drop. Currently, there is a web site of the Czech astronomical society which offers transit minima ephemerides and catalogue of the transits made by amateur and professional astronomers (Exoplanet transit database). We performed the first successful observation of transiting exoplanet in Slovakia in 2008 (Corot-Exo-2b), photometric lightcurve and resulting data and derived transiting system parameters were published (Vereš et al., 2009). Further observations of more exoplanets were directly submitted to the Exoplanet transit database, which is able to process the data online and determine the physical parameters of the system (Mandel & Agol, 2002;  Kwee, K.K.  van Woerden, 1956).

These follow-up observation are important for investigation of the transit duration, the time shift of the minimum or the lightcurve changes during following transits of the same object. These changes may imply presence of the additional, so far undetected exoplanet or massive moon orbiting the exoplanet.

Kwee, K. K., van Woerden, H. 1956, Bull. of the Astr. Inst. of the Netherlands, 464, 327

Mandel, K., Agol, E. 2002, ApJ, 580, 171

Vereš, P., Budaj, J., Világi, J., Galád, A., Kornoš, L. 2009. Contrib. Astron. Obs. Skalnaté Pleso, 39, 34

Some of the transits observed at AGO

Planet

Corot-2b

Date

27.8.2008, 17.9.2008

Filter

R

Observer

Vereš, P., Galád, A., Világi, J., Kornoš, L.

Planet diameter (Rj)

1.318+0.158

Inclination

87.88+0.15

Transit duration

134.4+9 min

Time of transit minimum

2454706.4016+0.03766 (HJD)

Transit depth

0.030+0.007

O-C

0.0033 d



Planet

TrES-2b

Date

12.4.2009

Filter

Clear

Observer

Gajdoš, Š., Jakšová, I.

Planet diameter (Rj)

0.93+0.14

Inclination

83.7+0.4

Transit duration

103.9+6.3 min

Time of transit minimum

2454933.52726+0.00168 (HJD)

Transit depth

0.010+0.002

O-C

-0.0008d



Planet

TrES-3b

Date

25.4.2009

Filter

Clear

Observer

Gajdoš, Š., Jakšová, I.

Planet diameter (Rj)

1.25+0.05

Inclination

81.7+0.4

Transit duration

77.6+3.8min

Time of transit minimum

2454947.41612+0.00078 (HJD)

Transit depth

0.027+0.002

O-C

-0.003 d


Planet

TrES-3b

Date

12.5.2009

Filter

Clear

Observer

Gajdoš, Š., Jakšová, I.

Planet diameter (Rj)

1.09+0.04

Inclination

81.5+0.3

Transit duration

72+3.3 min

Time of transit minimum

2454964.39728+0.00078 (HJD)

Transit depth

0.021+0.001

O-C

-0.0021 d


Planet

TrES-3b

Date

25.5.2009

Filter

Clear

Observer

Gajdoš, Š., Jakšová, I.

Planet diameter (Rj)

1.26+0.03

Inclination

81.5+0.16

Transit duration

75.4+1.5 min

Time of transit minimum

2454977.45991+0.00029 (HJD)

Transit depth

0.0280+0.001

O-C

-0.0013 d


Planet

TrES-3b

Date

11.7.2009

Filter

Clear

Observer

Vereš, P., Kornoš, L. Tóth. P.

Planet diameter (Rj)

1.23+0.02

Inclination

82.3+0.3

Transit duration

85.4+2.4 min

Time of transit minimum

2455024.48012+0.00046 (HJD)

Transit depth

0.029+0.001

O-C

-0.0040 d


Planet

TrES-3b

Date

18.8.2009

Filter

Clear

Observer

Gajdoš, Š., Jakšová, I.

Planet diameter (Rj)

1.2+0.04

Inclination

82.1+0.2

Transit duration

81.2+1.8min

Time of transit minimum

2455062.3629+0.00039 (HJD)

Transit depth

0.025+0.002

O-C

-0.0007 d


Planet

TrES-3b

Date

31.8.2009

Filter

Clear

Observer

Gajdoš, Š., Jakšová, I.

Planet diameter (Rj)

1.15+0.05

Inclination

82.2+0.4

Transit duration

81.7+3min

Time of transit minimum

2455075.42156+0.0006 (HJD)

Transit depth

0.023+0.002

O-C

-0.0039 d


Planet

Wasp-12b

Date

1.11.2009

Filter

Clear

Observer

Kornoš, L., Vereš, P.

Planet diameter (Rj)

1.74+0.03

Inclination

90.0+2.3

Transit duration

183.2+2.2 min

Time of transit minimum

2455136.54322+0.00066 (HJD)

Transit depth

0.014+0.001

O-C

-0.0011 d



Planet

Hat-P-5b

Date

1.4.2010

Filter

Clear

Observer

Világi, J., Gajdoš, Š.

Planet diameter (Rj)

1.27+0.02

Inclination

85.81+0.18

Transit duration

165.4+2 min

Time of transit minimum

2455379.47545+0.0006 (HJD)

Transit depth

0.014+0.001

O-C

-0.0051 d



Planet

Hat-P-12b

Date

9.4.2010

Filter

Clear

Observer

Világi, J., Gajdoš, Š.

Planet diameter (Rj)

1.059+0.014

Inclination

88.01+0.14

Transit duration

135.3+1.1 min

Time of transit minimum

2455312.42595+0.00032 (HJD)

Transit depth

0.026+0.001

O-C

-0.0002 d


Planet

Hat-P-6b

Date

21.8.2010

Filter

Clear

Observer

Vereš, P.

Planet diameter (Rj)

1.44+0.13

Inclination

85.4+0.4

Transit duration

215.8+4.9min

Time of transit minimum

2455430.46559+0.00141 (HJD)

Transit depth

0.011+0.002

O-C

0.0111 d


 

Powered by Etomite CMS.