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The MACHO Project SMC Variable Star Inventory: I. The Second-overtone Mode of Cepheid Pulsation From First/Second Overtone (1H/2H) Beat Cepheids
The MACHO Collaboration, C. Alcock, R. A. Allsman +16
We report the discovery of 20 1H/2H and 7 F/1H beat Cepheids in the SMC by the MACHO Project. We utilize the 20 1H/2H stars to determine lightcurve shape for the SMC second-overton…
The MACHO Project LMC Variable Star Inventory: The Discovery of RV Tauri stars and New Type II Cepheids in the LMC
The MACHO Collaboration, C. Alcock, R. A. Allsman +19
We report the discovery of RV Tauri stars in the Large Magellanic Cloud. In light and colour curve behaviour, the RV Tauri stars appear to be a direct extension of the type II Ceph…
The RR Lyrae Population of the Galactic Bulge from the MACHO Database
The MACHO Collaboration, C. Alcock, R. A. Allsman +21
Mean colors and magnitudes of RR Lyrae stars in 24 fields towards the Galactic bulge from the MACHO database are presented. Accurate mean reddenings are computed for these fields o…
The Zero Point of Extinction Toward Baade's Window From RR Lyrae Stars
C. Alcock, R. A. Allsman, D. R. Alves +20
We measure the zero point of the Stanek (1996) extinction map by comparing the observed (V-K) colors of 20 RR Lyrae stars (type ab) found in the MACHO survey with their intrinsic (…
MACHO Alert 95-30 : First Real-Time Observation of Extended Source Effects in Gravitational Microlensing
C. Alcock, W. H. Allen, R. A. Allsman +54
We present analysis of MACHO Alert 95-30, a dramatic gravitational microlensing event towards the Galactic bulge whose peak magnification departs significantly from the standard po…