HAT-P-13: a multi-site campaign to detect the transit of the second planet in the system

Abstract

A possible transit of HAT-P-13c has been predicted to occur on 2010 April 28. Here we report on the results of a multi-site campaign that has been organised to detect the event. CCD photometric observations have been carried out at five observatories in five countries. We reached 30% time coverage in a 5 days interval centered on the suspected transit of HAT-P-13c. Two transits of HAT-P-13b were also observed. No transit of HAT-P-13c has been detected while the campaign was on. By a numerical experiment with 10^5 model systems we conclude that HAT-P-13c is not a transiting exoplanet with a significance level from 65% to 72%, depending on the planet parameters and the prior assumptions. We present two times of transit of HAT-P-13b ocurring at BJD 2455141.5522 +- 0.0010 and BJD 2455249.4508 +- 0.0020. The TTV of HAT-P-13b is consistent with zero within 0.001 days. The refined orbital period of HAT-P-13b is 2.916293 +- 0.000010 days.

5 pages, 4 figures, to be accepted by A&A

References in corpus (4)

• HAT-P-7b: An Extremely Hot Massive Planet Transiting a Bright Star in the Kepler Field
• The HAT-P-13 Exoplanetary System: Evidence for Spin-Orbit Alignment and a Third Companion
• The determination of planetary structure in tidally relaxed inclined systems
• Methods for exomoon characterisation: combining transit photometry and the Rossiter-McLaughlin effect

Cited by in corpus (17)

• Asymmetric transit curves as indication of orbital obliquity: clues from the late-type dwarf companion in KOI-13
• Ground-based near-UV observations of 15 transiting exoplanets: Constraints on their atmospheres and no evidence for asymmetrical transits
• TESS Transit Timing of Hundreds of Hot Jupiters
• Long-Term Transit Timing Monitoring and Refined Light Curve Parameters of HAT-P-13b
• Multiple planets or exomoons in Kepler hot Jupiter systems with transit timing variations?
• Multi-site campaign for transit timing variations of WASP-12 b: possible detection of a long-period signal of planetary origin
• Instrumental Methods for Professional and Amateur Collaborations in Planetary Astronomy
• Refined physical properties of the HAT-P-13 planetary system
• Homogeneously derived transit timings for 17 exoplanets and reassessed TTV trends for WASP-12 and WASP-4
• Constraining the interior of extrasolar giant planets with the tidal Love number k_2 using the example of HAT-P-13b
• TASTE IV. Refining ephemeris and orbital parameters for HAT-P-20b and WASP-1b
• Transit timing variations in the HAT-P-13 planetary system
• Exoplanet Transits Registered at the Universidad de Monterrey Observatory. Part I: HAT-P-12b, HAT-P-13b, HAT-P-16b, HAT-P-23b and WASP-10b
• The Atmosphere and Interior Structure of HAT-P-13b from Spitzer Secondary Eclipses
• TASTE. II. A new observational study of transit time variations in HAT-P-13b
• Looking For Timing Variations in the Transits of 16 Exoplanets
• The study on transiting systems HAT-P-13, HAT-P-16 and WASP-32 through combining ground-based and TESS photometry