The Optical Gravitational Lensing Experiment. BVI Maps of Dense Stellar Regions. I. The Small Magellanic Cloud

• Autorzy: Udalski, A. , Szymański, M. , Kubiak, M. , Pietrzyński, G. , Woźniak, P. , Żebruń, K.
• Języki publikacji: EN

Abstrakty

EN

We present three color, BVI maps of the Small Magellanic Cloud. The maps contain precise photometric and astrometric data for about 2.2 million stars from the central regions of the SMC bar covering ≈2.4 square degrees on the sky. Mean brightness of stars is derived from observations collected in the course of the OGLE-II microlensing search from about 130, 30 and 15 measurements in the I, V and B-bands, respectively. Accuracy of the zero points of photometry is about 0.01 mag, and astrometry 0.15 arcsec (with possible systematic error up to 0.7 arcsec). Color-magnitude diagrams of observed fields are also presented. The maps of the SMC are the first from the series of similar maps covering other OGLE fields: LMC, Galactic bulge and Galactic disk. The data are very well suited for many projects, particularly for the SMC which has been neglected photometrically for years. Because of potentially great impact on many astrophysical fields we decided to make the SMC data available to the astronomical community from the OGLE Internet archive.

Słowa kluczowe

EN

Magellanic Clouds; surveys; catalogs; techniques: photometric

• Czasopismo: Acta Astronomica
• Rocznik: 1998
• Tom: Vol. 48, No. 2
• Strony: 147--174
• Opis fizyczny: Bibliogr. 19 poz., rys., tab., wykr.

Twórcy

autor

Udalski, A.

• 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

Pietrzyński, G.

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

autor

Woźniak, P.

• Princeton University Observatory, Princeton, NJ 08544-1001, USA,

autor

Żebruń, K.

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

Bibliografia

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