Hostname: page-component-586b7cd67f-tf8b9 Total loading time: 0 Render date: 2024-11-25T17:30:40.791Z Has data issue: false hasContentIssue false
  • English
  • Français

Current Status of the Microlensing Surveys

Published online by Cambridge University Press:  12 April 2016

Bohdan Paczyński
Bohdan Paczyński*
Affiliation:
Princeton University Observatory, Princeton, NJ 08544, USA

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

The ongoing microlensing searches have generated more photometric measurements of pulsating stars than all previous observing projects combined. In particular, OGLE has made ∼ 340,000 B, V, and I-band measurements of ∼ 1,300 Cepheids in the Large Magellanic Clouds accessible over Internet. Microlensing searches contributed to the development of very efficient image subtraction software which works best in crowded fields. This suggests the use of a period – flux amplitude rather than period – luminosity relation for the Cepheids for distance determination, as the flux amplitude is directly measurable with the image subtraction, and it is not biased by crowding. Future projects will dramatically increase the data rate, will provide all-sky coverage and a complete census of variables, including pulsating stars, to the ever fainter limits. Time will show which approach, a small number of large teams or a large number of small teams, will be more productive.

Type
Part 1. Large Scale Surveys: Present and Future
Information
International Astronomical Union Colloquium , Volume 176: The Impact of Large-Scale Surveys on Pulsating Star Research , 2000 , pp. 8 - 18
Copyright
Copyright © Astronomical Society of the Pacific 2000

References

Akerlof, C., Balsano, R., Barthelmy, S., et al. (ROTSE) 1999, Nature, 398, 400 Google Scholar
Alard, C. (DUO) 1996, ApJ, 458, L17 Google Scholar
Alard, C. (OGLE) 1999a, A&A, 343, 10 Google Scholar
Alard, C. (OGLE) 1999b, astro-ph/9903111Google Scholar
Alard, C. & Guibert, J. (DUO) 1997, A&A, 326, 1 Google Scholar
Alard, C. & Lupton, R.H. (OGLE) 1997, ApJ, 503, 325 Google Scholar
Alard, C., Mao, S., & Guibert, J. (DUO) 1995, A&A, 300, L17 Google Scholar
Alcock, C., Akerlof, C.W., Allsman, R.A., et al. (MACHO) 1993, Nature, 365, 621 Google Scholar
Alcock, C., Allsman, R.A., Axelrod, T.S., et al. (MACHO) 1995, AJ, 109, 1653 Google Scholar
Alcock, C., Allsman, R.A., Axelrod, T.S., et al. (MACHO) 1996, AJ, 111, 1146 Google Scholar
Alcock, C., Allsman, R.A., Alves, D., et al. (MACHO) 1997a, ApJ, 474, 217 Google Scholar
Alcock, C., Allsman, R.A., Alves, D., et al. (MACHO) 1997b, ApJ, 482, 89 Google Scholar
Alcock, C., Allsman, R.A., Alves, D., et al. (MACHO) 1998, AJ, 115, 1921 Google Scholar
Alcock, C., Allsman, R.A., Alves, D., et al. (MACHO) 1999a, ApJ, 511, 185 Google Scholar
Alcock, C., Allsman, R.A., Alves, D., et al. (MACHO) 1999b, ApJ, 521, 602 Google Scholar
Alcock, C., Allsman, R.A., Alves, D., et al. (MACHO) 1999c, ApJS, 124, 171 CrossRefGoogle Scholar
Angel, R., Lesser, M., Sarlot, R., & Dunham, T. (DMT) 1999, preprintGoogle Scholar
Armandroff, T., Bernstein, G., Dell’Antonio, I., et al. (DMT) 1999, preprintGoogle Scholar
Aubourg, E., Bareyre, P., Brehin, S., et al. (EROS) 1993, Nature, 365, 623 Google Scholar
Bauer, F., Afonso, C., Albert, J.N., et al. (EROS) 1999, A&A, 348, 175 Google Scholar
Beaulieu, J.P., Krockenberger, M., Sasselov, D.D., et al. (EROS) 1997a, A&A, 318, L47 Google Scholar
Beaulieu, J.P., Sasselov, D.D., Renault, C., et al. (EROS) 1997b. A&A, 321, L5 Google Scholar
Ferlet, R., Maillard, J.-P. & Raban, B. (ed.) 1997, Variable Stars and the Astro-physical Returns of the Microlensing Searches (Gif-sur-Yvette: Editions Frontiéres)Google Scholar
Ibata, R.A., Gilmore, G., & Irwin, M.J. 1995. MNRAS, 277, 781 Google Scholar
Kaluzny, J., Kubiak, M., Szymański, M., et al. (OGLE) 1995, A&AS, 112, 407 Google Scholar
Kaluzny, J., Stanek, K.Z., Krockenberger, M., et al. (DIRECT) 1998, AJ, 115, 1016 Google Scholar
Kaluzny, J., Mochejska, B.J., Stanek, K.Z., et al. (DIRECT) 1999, AJ, 118, 346 Google Scholar
Kovács, G. & Jurcsik, J. 1996, ApJ, 466, L17 Google Scholar
Lanoix, P., Garnier, R., Paturel, G., et al. 1999, astro-ph/9904027Google Scholar
McKay, T. 1999, private communicationGoogle Scholar
Mochejska, B.J., Macri, L.M., Sasselov, D.D., & Stanek, K.Z. (DIRECT) 1999, astro-ph/9908293Google Scholar
Olech, A., Woźniak, P.R., Alard, C., et al. 1999, astro-ph/9905065Google Scholar
Pojmański, G. (ASAS) 1997, Acta Astron., 47, 467 Google Scholar
Pojmański, G. (ASAS) 1998, Acta Astron., 48, 35 Google Scholar
Sasselov, D.D., Beaulieu, J.P., Renault, C., et al. (EROS) 1997, A&A, 324, 471 Google Scholar
Stanek, K.Z. & Udalski, A. (OGLE) 1999, astro-ph/9909346Google Scholar
Stanek, K.Z., Kaluzny, J., Krockenberger, M., et al. (DIRECT) 1999, AJ, 117, 2810 Google Scholar
Tomaney, A.B. & Crotts, A.P.S. 1996, AJ, 112, 2872 Google Scholar
Udalski, A., Szymański, M., Kaluzny, J., et al. (OGLE) 1993, Acta Astron., 43, 289 Google Scholar
Udalski, A., Szymański, M., & Kubiak, M. (OGLE) 1997, Acta Astron., 47, 319 Google Scholar
Udalski, A., Soszyński, I., Szymański, M., et al. (OGLE) 1999a, Acta Astron., 49, 1 Google Scholar
Udalski, A., Soszyński, I., Szymański, M., et al. (OGLE) 1999b, Acta Astron., 49, 45 Google Scholar
Udalski, A., Szymański, M., Kubiak, M., et al. (OGLE) 1999c, Acta Astron., 49, 201 Google Scholar
Udalski, A., Soszyński, I., Szymański, M., et al. (OGLE) 1999d, Acta Astron., 49, 223 Google Scholar
Williams, G.G., Park, H.S.. Ables, R., et al. (LOTIS) 1999, ApJ, 519, L25 Google Scholar
Woźniak, P. (OGLE) 1999, in preparationGoogle Scholar
Woźniak, P., Alard, C., Udalski, A., et al. (OGLE) 1999, astro-ph/9904329Google Scholar