The Optical Gravitational Lensing Experiment. Search for Planetary and Low-Luminosity Object Transits in the Galactic Disk. Results of 2001 Campaign - Supplement

• Autorzy: Udalski, A. , Żebruń, K. , Szymański, M. , Kubiak, M. , Soszyński, I. , Szewczyk, O. , Wyrzykowski, Ł. , Pietrzyński, G.
• Języki publikacji: EN

Abstrakty

EN

The photometric data collected during 2001 season OGLE-III planetary/low luminosity object transit campaign were reanalyzed with the new transit search technique - the BLS method by Kovacs, Zucker and Mazeh. In addition to all presented in our original paper transits, additional 13 objects with transiting low-luminosity companions were discovered. We present here a supplement to our original catalog - the photometric data, light curves and finding charts of all 13 new objects. The model fits to the transit light curves indicate that a few new objects may be Jupiter-sized (R<1.6 R_Jup). OGLE-TR-56 is a particularly interesting case. Its transit has only 13 mmag depth, short duration and a period of 1.21190 days. Model fit indicates that the companion may be Saturn-sized if the passage were central. Spectroscopic follow-up observations are encouraged for final classification of the transiting objects as planets, brown dwarfs or late M-type dwarf stars. We also provide the most recent ephemerides of other most promising planetary transits: OGLE-TR-10 and OGLE-TR-40 based on observations collected in June 2002. All photometric data are available to the astronomical community from the OGLE Internet archive.

Słowa kluczowe

EN

planetary systems; stars: low-mass; stars: brown dwarfs; binaries: eclipsing

• Czasopismo: Acta Astronomica
• Rocznik: 2002
• Tom: Vol. 52, No. 2
• Strony: 115--128
• Opis fizyczny: bibliogr. 5 poz., tab.

Twórcy

autor

Udalski, A.

• Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warszawa, Poland ,

autor

Żebruń, K.

• Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warszawa, Poland ,

autor

Szymański, M.

• Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warszawa, Poland ,

autor

Kubiak, M.

• Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warszawa, Poland ,

autor

Soszyński, I.

• Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warszawa, Poland ,

autor

Szewczyk, O.

• Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warszawa, Poland ,

autor

Wyrzykowski, Ł.

• Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warszawa, Poland ,

autor

Pietrzyński, G.

• Universidad de Concepción, Departamento de Fisica, Casilla 160-C, Concepción, Chile ,
• Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warszawa, Poland

Bibliografia

• Kovacs, G., Zucker, S., and Mazeh, T. 2002, Astron. Astrophys., in press; astro-ph/0206099.
• Sackett, P.D. 1999, in: "Planets Outside the Solar System: Theory and Observations," Eds. J.-M. Mariotti and D. Alloin, NATO-ASI Series, Kluwer, 189.
• Reid, I.N., and Mahoney, S. 2000, MNRAS, 316, 827.
• Santos, N.C. et al. 2002, Astron. Astrophys., in press; astro-ph/0206213.
• Udalski, A., Paczyński, B., Żebruń, K., Szymański, M., Kubiak, M., Soszyński, I., Szewczyk, O., Wyrzykowski, Ł., and Pietrzyński, G. 2002, Acta Astron., 52, 1.