Upper Limits on the Number of Small Bodies in Sedna-Like Orbits by the TAOS Project (2009)
Lehner, M. J., Bianco, F. B., Alcock, C., ...
We present the results of a search for occultation events by objects at distances between 100 and 1000 AU in lightcurves from the Taiwanese-American Occultation Survey (TAOS). We searched for...
A Close Binary Star Resolved from Occultation by 87 Sylvia (2009)
Lin, Chi-Long, Zhang, Zhi-Wei, Chen, W. P., King, Sun-Kun, Lin, Hung-Chin, ...
The star BD +29 1748 was resolved to be a close binary from its occultation by the asteroid 87 Sylvia on 2006 December 18 UT. Four telescopes were used to observe this event at two sites separated by...
The MACHO Project HST Follow-Up: The Large Magellanic Cloud Microlensing Source Stars (2009)
Nelson, C. A., Drake, A. J., Cook, K. H., Bennett, D. P., Popowski, P., Dalal, N., ...
We present Hubble Space Telescope (HST) WFPC2 photometry of 13 microlensed source stars from the 5.7 year Large Magellanic Cloud (LMC) survey conducted by the MACHO Project. The microlensing source...
The Taiwanese-American Occultation Survey : the multi-telescope robotic observatory (2009)
Lehner, M. J., Marshall, S. L., Schwamb, M. E., ...
The Taiwanese-American Occultation Survey (TAOS) operates four fully automatic telescopes to search for occultations of stars by Kuiper Belt Objects. It is a versatile facility that is also useful...
A Close Binary Star Resolved from Occultation by 87 Sylvia (2009)
Lin, Chi-Long, Zhang, Zhi-Wei, Chen, W. P., King, Sun-Kun, Lin, Hung-Chin, Bianco, F. B., ...
The star BD+29 1748 was resolved to be a close binary from its occultation by the asteroid 87 Sylvia on 2006 December 18 UT. Four telescopes were used to observe this event at two sites separated by...
First Results from the Taiwanese-American Occultation Survey (TAOS) (2008)
Bianco, F. B., Lehner, M. J., Coehlo, N. K., Mondal, S., ...
Results from the first 2 years of data from the Taiwanese-American Occultation Survey (TAOS) are presented. Stars have been monitored photometrically at 4 or 5 Hz to search for occultations by small...
First Results From The Taiwanese-American Occultation Survey (TAOS) (2008)
Bianco, F. B., Lehner, M. J., Coehlo, N. K., Mondal, S., ...
Results from the first two years of data from the Taiwanese-American Occultation Survey (TAOS) are presented. Stars have been monitored photometrically at 4 Hz or 5 Hz to search for occultations by...
Early optical brightening in GRB 071010B (2008)
Wang, J. H., Schwamb, M. E., Huang, K. Y., Wen, C. Y., Zhang, Z. W., Wang, S. Y., ...
We report the detection of early (60-230 s) optical emission of the gamma-ray burst afterglow of GRB 071010B. No significant correlation with the prompt γ-ray emission was found. Our high time...
The Taiwanese-American Occultation Survey: The Multi-Telescope Robotic Observatory (2008)
Lehner, M. J., Marshall, S. L., Schwamb, M. E., ...
The Taiwanese-American Occultation Survey (TAOS) operates four fully automatic telescopes to search for occultations of stars by Kuiper Belt Objects. It is a versatile facility that is also useful...
D. L. Welch, A. Rorabeck, C. Alcock, D. P. Bennett, D. Minniti, K. C. Freeman
3 B.A. PETERSON 3, A.W. RODGERS 3, K. GRIEST
Cepheids in the Magellanic Clouds (2007)
D. L. Welch, C. Alcock, D.P. Bennett, K.H. Cook, A. W. Rodgers, K. Griest, ...
. In the past few years, the Magellanic Clouds have been the targets for several major variable star surveys. The results of these surveys are now becoming available and it is clear that a...
The MACHO Project LMC Variable Star Inventory: IV. New R Coronae Borealis Stars (2007)
Alcock Allsman, C. Alcock, D. R. Alves, A. Becker, D. P. Bennett, K. H. Cook, ...
We report the discovery of two new R Coronae Borealis (RCB) stars in the Large Magellanic Cloud (LMC) using the MACHO project photometry database. The identification of both stars has been confirmed...
Rr Lyrae Stars In The Macho Database (2007)
Minniti Alcock, D. Minniti, C. Alcock, D. P. Bennett, K. H. Cook, K. C. Freeman, ...
The MACHO Project has catalogued ¸ 8000 RR Lyrae stars in the Large Magellanic Cloud, ¸ 1800 in the Galactic bulge, and ¸ 50 in the Sgr dwarf galaxy. These variables are excellent distance...
EROS and MACHO Combined Limits on Planetary Mass Dark Matter in the Galactic Halo (2007)
Alcock Allsman, C. Alcock, R. A. Allsman, D. Alves, R. Ansari, E. Aubourg, ...
The EROS and MACHO collaborations have each published upper limits on the amount of planetary mass dark matter in the Galactic Halo obtained from gravitational microlensing searches. In this paper...
Detectability of Occultation of Stars by Objects in the Kuiper Belt and Oort Cloud (2007)
Nihei, T. C., Lehner, M. J., Bianco, F. B., Giammarco, J. M., Alcock, C.
The serendipitous detection of stellar occultations by Outer Solar System objects is a powerful method for ascertaining the small end ($r \lesssim 15$ km) of the size distribution of Kuiper Belt...
Search for Small Trans-Neptunian Objects by the TAOS Project (2006)
Chen, W. P., Alcock, C., Axelrod, T., Bianco, F. B., Byun, Y. I., Chang, Y. H., ...
The Taiwan-America Occultation Survey (TAOS) aims to determine the number of small icy bodies in the outer reach of the Solar System by means of stellar occultation. An array of 4 robotic small...
Mass-Losing Semiregular Variable Stars in Baade's Windows (2005)
Alard, C., Blommaert, J., Cesarsky, C., Epchtein, N., Felli, M., Fouque, P., ...
By cross-correlating the results of two recent large-scale surveys, the general properties of a well defined sample of semi-regular variable stars have been determined. ISOGAL mid-infrared photometry...
Finding outlier light-curves in catalogs of periodic variable stars (2005)
Protopapas, P., Giammarco, J. M., Faccioli, L., Struble, M. F., Dave, R., Alcock, C.
We present a methodology to discover outliers in catalogs of periodic light-curves. We use cross-correlation as measure of ``similarity'' between two individual light-curves and then classify...
Microlensing optical depth toward the galactic bulge using clump giants from the MACHO survey (2005)
Popowski, P., Griest, K., Thomas, C. L., Cook, K. H., Bennett, D. P., Becker, A. C., ...
Galactic bulge microlensing events from the MACHO Collaboration (2005)
Thomas, C. L., Griest, K., Popowski, P., Cook, K. H., Drake, A. J., Minniti, D., ...
Popowski, P., Griest, K., Thomas, C. L., Cook, K. H., Bennett, D. P., Becker, A. C., ...
Using 7 years of MACHO survey data, we present a new determination of the optical depth to microlensing towards the Galactic bulge. We select the sample of 62 microlensing events (60 unique) on clump...
Galactic Bulge Microlensing Events from the MACHO Collaboration (2004)
Thomas, C. L., Griest, K., Popowski, P., Cook, K. H., Drake, A. J., Minniti, D., ...
We present a catalog of 450 high signal-to-noise microlensing events observed by the MACHO collaboration between 1993 and 1999. The events are distributed throughout our fields and, as expected, they...
Alcock, C., Alves, D. R., Axelrod, T. S., Becker, A. C., Bennett, D. P., Clement, C. M., ...
Fourier coefficents have been derived for the $V$ and $R$ light curves of 785 overtone RR Lyrae variables in 16 MACHO fields near the bar of the LMC. The $\phi_{31}$ and $R_{21}$ coefficients have...
Alcock, C., Alves, D. R., Becker, A., Bennett, D., Cook, K. H., Drake, A., ...
We have frequency analyzed 6391 variables classified earlier as fundamental mode RR Lyrae (RR0) stars in the MACHO database on the Large Magellanic Cloud (LMC). The overwhelming majority of these...
Recent Microlensing Results from the MACHO Project (2003)
Popowski, P., Nelson, C. A., Bennett, D. P., Drake, A. J., Vandehei, T., Griest, K., ...
We describe a few recent microlensing results from the MACHO Collaboration. The aim of the MACHO Project was the identification and quantitative description of dark and luminous matter in the Milky...
Variability-selected quasars in MACHO project Magellanic Cloud fields (2003)
Geha, M., Alcock, C., Allsman, R. A., Alves, D. R., Axelrod, T. S., Becker, A. C., ...
We present 47 spectroscopically confirmed quasars discovered behind the Magellanic Clouds identified via photometric variability in the MACHO database. Thirty-eight quasars lie behind the Large...
Variability-Selected Quasars in MACHO Project Magellanic Cloud Fields (2002)
Geha, M., Alcock, C., Allsman, R. A., Alves, D. R., Axelrod, T. S., Becker, A. C., ...
We present 47 spectroscopically-confirmed quasars discovered behind the Magellanic Clouds identified via photometric variability in the MACHO database. Thirty-eight quasars lie behind the Large...
MACHO Project Analysis of the Galactic Bulge Microlensing Events with Clump Giants as Sources (2002)
Popowski, P., Vandehei, T., Griest, K., Alcock, C., Allsman, R. A., Alves, D. R., ...
We present preliminary results of the analysis of 5 years of MACHO data on the Galactic bulge microlensing events with clump giants as sources. This class of events allows one to obtain robust...
Alcock, C., Allsman, R. A., Alves, D. R., Becker, A. C., Bennett, D. P., Cook, K. H., ...
We present a method for solving the lightcurve of an eclipsing binary system which contains a Cepheid variable as one of its components as well as the solutions for three eclipsing Cepheids in the...
Correcting parameters of events based on the entropy of microlensing ensemble (2002)
We entertain the idea that robust theoretical expectations can become a tool in removing hidden observational or data- reduction biases. We illustrate this approach for a specific problem associated...
Gravitational microlensing events due to stellar-mass black holes (2002)
Bennett, D. P., Becker, A. C., Quinn, J. L., Tomaney, A. B., Alcock, C., Allsman, R. A., ...
We present an analysis of the longest timescale microlensing events discovered by the MACHO Collaboration during a 7 year survey of the Galactic bulge. We find six events that exhibit very strong...
Alcock, C., Allsman, R. A., Alves, D. R., Becker, A. C., Bennett, D. P., Cook, K. H., ...
We present a method for solving the light curve of an eclipsing binary system that contains a Cepheid variable as one of its components as well as the solutions for three eclipsing Cepheids in the...
Gravitational Microlensing Events Due to Stellar Mass Black Holes (2001)
Bennett, D. P., Becker, A. C., Quinn, J. L., Tomaney, A. B., Alcock, C., Allsman, R. A., ...
We present an analysis of the longest timescale microlensing events discovered by the MACHO Collaboration during a 7 year survey of the Galactic bulge. We find 6 events that exhibit very strong...
The MACHO Project LMC Variable Star Inventory: X. The R Coronae Borealis Stars (2001)
Alcock, C., Allsman, R. A., Alves, D. R., Axelrod, T. S., Becker, A., Bennett, D. P., ...
We report the discovery of eight new R Coronae Borealis (RCB) stars in the Large Magellanic Cloud (LMC) using the MACHO project photometry database. The discovery of these new stars increases the...
Mass-Losing Semiregular Variable Stars in Baade's Windows (2001)
Alard, C., Blommaert, J., Cesarsky, C., Epchtein, N., Felli, M., Fouque, P., ...
By cross-correlating the results of two recent large-scale surveys, the general properties of a well defined sample of semi-regular variable stars have been determined. ISOGAL mid-infrared photometry...
Mass-Losing Semiregular Variable Stars in Baade's Windows (2001)
Alard, C., Blommaert, J., Cesarsky, C., Epchtein, N., Felli, M., Fouque, P., ...
By cross-correlating the results of two recent large-scale surveys, the general properties of a well defined sample of semi-regular variable stars have been determined. ISOGAL mid-infrared photometry...
Mass-Losing Semiregular Variable Stars in Baade's Windows (2001)
Alard, C., Blommaert, J., Cesarsky, C., Epchtein, N., Felli, M., Fouque, P., ...
By cross-correlating the results of two recent large-scale surveys, the general properties of a well defined sample of semi-regular variable stars have been determined. ISOGAL mid-infrared photometry...
MACHO 96-LMC-2: Lensing of a Binary Source in the LMC and Constraints on the Lensing Object (2000)
Alcock, C., Allsman, R. A., Alves, D. R., Axelrod, T. S., Becker, A. C., Bennett, D. P., ...
We present photometry and analysis of the microlensing alert MACHO 96-LMC-2. The ~3% photometry provided by the Global Microlensing Alert Network follow--up effort reveals a periodic modulation in...
A 421 d Activity Cycle in the BeX Recurrent Transient A0538-66 from MACHO monitoring (2000)
Alcock, C., Allsman, R. A., Alves, D. R., Axelrod, T. S., Becker, A. C., Bennett, D. P., ...
We present a ~ 5-yr optical light curve of the recurrent Be/X-ray transient A0538-66 obtained as a by-product of the MACHO Project. These data reveal both a long-term modulation at P = 420.8 +/- 0.8...
Alcock, C., Allsman, R. A., Alves, D. R., Axelrod, T. S., Becker, A. C., Bennett, D. P., ...
We attempt to determine whether the MACHO microlensing source stars are drawn from the average population of the LMC or from a population behind the LMC by examining the HST color-magnitude diagram...
Galactic Bulge Microlensing Events with Clump Giants as Sources (2000)
Popowski, P., Alcock, C., Allsman, R. A., Alves, D. R., Axelrod, T. S., Becker, A. C., ...
We present preliminary results of the analysis of 5 years of MACHO data on the Galactic bulge microlensing events with clump giants as sources. In particular, we discuss: 1) the selection of `giant'...
Alcock, C., Allsman, R., Alves, D. R., Axelrod, T., Becker, A., Bennett, D., ...
More than 1300 variables classified provisionally as first overtone RR Lyrae pulsators in the MACHO variable star database of the Large Magellanic Cloud (LMC) have been subjected to standard...
Searching for periodicities in the MACHO light curve of LMC X-2 (2000)
Alcock, C., Allsman, R. A., Alves, D. R., Axelrod, T. S., Becker, A. C., Bennett, D. P., ...
Using the exceptional long-term monitoring capabilities of the MACHO project, we present here the optical history of LMC X-2 for a continuous 6-yr period. These data were used to investigate the...
Alcock, C., Allsman, R. A., Alves, D. R., Axelrod, T. S., Becker, A. C., Bennett, D. P., ...
We present the microlensing optical depth towards the Galactic bulge based on the detection of 99 events found in our Difference Image Analysis (DIA) survey. This analysis encompasses three years of...
The MACHO Project 9 Million Star Color-Magnitude Diagram of the Large Magellanic Cloud (2000)
Alcock, C., Allsman, R. A., Alves, D. R., Axelrod, T. S., Basu, A., Becker, A. C., ...
We present a 9 million star color-magnitude diagram (9M CMD) of the LMC bar. The 9M CMD reveals a complex superposition of different age and metallicity stellar populations, with important stellar...
Searching for periodicities in the MACHO light curve of LMC X-2 (2000)
Alcock, C., Allsman, R.A., Alves, D.R., Axelrod, T.S., Becker, A.C., Bennet, D.P., ...
Combined Analysis of the Binary Lens Caustic-Crossing Event MACHO 98-SMC-1 (2000)
Afonso, C, Alard, C, Albert, JN, Andersen, J, Ansari, R, Aubourg, E, ...
Adaptive Optics High Resolution Spectroscopy: Present Status and Future Direction (2000)
Jian Ge, Jian Ge Ciarlo, P. Kuzmenko, C. Alcock, B. Macintosh, R. Angel, ...
High resolution spectroscopy experiments with visible adaptive optics (AO) telescopes at Starfire Optical Range and Mt. Wilson have demonstrated that spectral resolution can be routinely improved by...
Adaptive Optics High Resolution Spectroscopy: Present Status and Future Direction (2000)
Ge Ciarlo Kuzmenko, J. Ge, D. Ciarlo, P. Kuzmenko, C. Alcock, B. Macintosh, ...
. High resolution spectroscopy experiments with visible adaptive optics telescopes at Starfire Optical Range and Mt. Wilson have demonstrated that spectral resolution can be routinely improved by a...
Calibration of the MACHO Photometry Database (1999)
Alcock, C., Allsman, R. A., Alves, D. R., Axelrod, T. S., Becker, A. C., Bennett, D. P., ...
The MACHO Project is a microlensing survey that monitors the brightnesses of 60 million stars in the Large Magellanic Cloud (LMC), Small Magellanic Cloud, and Galactic bulge. Our database presently...
Combined Analysis of the Binary-Lens Caustic-Crossing Event MACHO 98-SMC-1 (1999)
Afonso, C., Alcock, C., Rhie, S. H., Al., A. Udalski Et, Al., M. Albrow Et
We fit the data for the binary-lens microlensing event MACHO 98-SMC-1 from 5 different microlensing collaborations and find two distinct solutions characterized by binary separation d and mass ratio...
EROS and MACHO Combined Limits on Planetary Mass Dark Matter in the Galactic Halo (1999)
Alcock, C., Allsman, R.A., Alves, D., Ansari, R., Aubourg, E., Axelrod, T.S., ...
Difference Image Analysis of Galactic Microlensing II. Microlensing Events (1999)
Alcock, C., Allsman, R. A., Alves, D., Axelrod, T. S., Becker, A. C., Bennett, D. P., ...
The MACHO collaboration has been carrying out Difference Image Analysis (DIA) since 1996 with the aim of increasing the sensitivity to the detection of gravitational microlensing. This is a...
Difference Image Analysis of Galactic Microlensing I. Data Analysis (1999)
Alcock, C., Allsman, R. A., Alves, D., Axelrod, T. S., Becker, A. C., Bennett, D. P., ...
This is a preliminary report on the application of Difference Image Analysis (DIA) to galactic bulge images. The aim of this analysis is to increase the sensitivity to the detection of gravitational...
Cepheid Variables in the LMC and SMC (1999)
Alcock, C., Allsman, R. A., Alves, D. R., Axelrod, T. S., Becker, A. C., ...
In this paper, we will review major new results regarding classical Cepheids, in the Large Magellanic Cloud (LMC) and Small Magellanic Cloud (SMC). Specifically, we discuss recent work regarding...
Alcock, C., Allsman, R. A., Alves, D. R., Axelrod, T. S., Becker, A. C., Bennett, D. P., ...
We present an analysis of the period distribution of $\sim 1800$ Cepheids in the Large Magellanic Cloud, based on data obtained by the MACHO microlensing experiment and on a previous catalogue by...
Alves, D. R., Basu, A., Cook, K. H., Welch, D. L., Alcock, C., Marshall, S., ...
This paper has been withdrawn
Discovery and Characterization of a Caustic Crossing Microlensing Event in the SMC (1998)
Alcock, C., Allsman, R. A., Alves, D., Axelrod, T. S., Becker, A. C., Bennett, D. P., ...
We present photometric observations and analysis of the second microlensing event detected towards the Small Magellanic Cloud (SMC), MACHO Alert 98-SMC-1. This event was detected early enough to...
The MACHO Project LMC Variable Star Inventory: Classical Cepheids and AGB Variables (1998)
Alves, D., Alcock, C., Cook, K., Marshall, S., Minniti, D., Allsman, R., ...
This paper has been withdrawn by the author.
EROS and MACHO Combined Limits on Planetary Mass Dark Matter in the Galactic Halo (1998)
Alcock, C., Allsman, R.A., Alves, D., Ansari, R., Aubourg, E., Axelrod, T.S., ...
EROS and MACHO Combined Limits on Planetary Mass Dark Matter in the Galactic Halo (1998)
Alcock, C., Allsman, R.A., Alves, D., Ansari, R., Aubourg, E., Axelrod, T.S., ...
Detection of Lithium in a Main Sequence Bulge Star Using Keck I as a 15m Diameter Telescope (1997)
Minniti, D., Vandehei, T., Cook, K. H., Griest, K., Alcock, C.
The bulge contains the most chemically evolved old stellar population in the Milky Way. Thanks to microlensing, it is now possible to obtain high resolution echelle spectra of bulge stars near the...
Pulsating Variable Stars in the MACHO Bulge database: The Semiregular Variables (1997)
Minniti, D., Alcock, C., Allsman, R. A., Alves, D. R., Axelrod, T. S., Becker, A., ...
We review the pulsating stars contained in the top 24 fields of the MACHO bulge database, with special emphasis on the red semiregular stars. Based on period, amplitude and color cuts, we have...
The MACHO Project: Microlensing and Variable Stars (1997)
Alcock, C., Allsman, R. A., Alves, D. R., Axelrod, T. S., Becker, A., ...
The MACHO Project monitors millions of stars in the Large Magellanic Cloud, the Small Magellanic Cloud and the bulge of the Milky Way searching for the gravitational microlensing signature of...
The Zero Point of Extinction Toward Baade's Window From RR Lyrae Stars (1997)
Alcock, C., Allsman, R. A., Alves, D. R., Axelrod, T. S., Becker, A. C., Bennett, D. P., ...
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 (V-K)_0 colors as a...
Alcock, C., Allen, W. H., Allsman, R. A., Alves, D., Axelrod, T. S., Banks, T. S., ...
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 point-source...
Optical photometry of the eclipsing Large Magellanic Cloud supersoft source CAL 87 (1997)
We present optical photometry of the eclipsing supersoft source, CAL87. These observations comprise long term data accumulated as a by-product of the MACHO Project, and high speed white light...
Planetary Microlensing from the MACHO Project (1996)
Alcock, C., Allsman, R. A., Alves, D., Axelrod, T. S., Becker, A., ...
We present the lightcurves of two microlensing events from the MACHO Project data that are likely to be due to lenses with masses similar to Jupiter's mass. Although the MACHO Project survey data are...
Gravitational Microlensing Results from MACHO (1996)
Alcock, C., Allsman, R. A., Alves, D., Axelrod, T. S., Becker, A. C., ...
The MACHO project is searching for dark matter in the form of massive compact halo objects (Machos), by monitoring the brightness of millions of stars in the Magellanic Clouds to search for...
Cepheids in the LMC: Results from the MACHO Project (1996)
Alcock, C., Allsman, R. A., Alves, D. R., Axelrod, T. S., Becker, A., ...
The approximately 1500 Cepheid variables in 22 LMC fields of the MACHO Project survey have been calibrated and analysed. In this paper, we report improved period ratios for a total of 73 beat...
RR Lyrae Stars in the MACHO Database (1996)
Alcock, C., Alves, D. R., Allsman, R. A., Axelrod, T. S., Becker, A., ...
The MACHO Project has catalogued $\sim 8000$ RR Lyrae stars in the Large Magellanic Cloud, $\sim 1800$ in the Galactic bulge, and $\sim$ 50 in the Sgr dwarf galaxy. These variables are excellent...
Alcock, C., Allsman, R. A., Alves, D., Axelrod, T. S., Becker, A. C., Bennett, D. P., ...
We report the discovery of 73 double-mode RR Lyrae (RRd) stars in fields near the bar of the LMC. The stars are detected among the MACHO database of short-period variables that currently contains...
Alcock, C., Allsman, R. A., Alves, D., Axelrod, T. S., Becker, A. C., Bennett, D. P., ...
The MACHO Project is a search for dark matter in the form of massive compact halo objects (Machos). Photometric monitoring of millions of stars in the Large Magellanic Cloud (LMC), Small Magellanic...
The MACHO Project 2nd Year LMC Microlensing Results and Dark Matter Implications (1996)
Pratt, M. R., Alcock, C., Allsman, R. A., Alves, D., Axelrod, T. S., Becker, A. C., ...
The MACHO Project is searching for galactic dark matter in the form of massive compact halo objects (Machos). Millions of stars in the Large Magellanic Cloud (LMC), Small Magellanic Cloud (SMC), and...
A Binary Lensing Event Toward the LMC: Observations and Dark Matter Implications (1996)
Bennett, D. P., Alcock, C., Allsman, R. A., Alves, D., Axelrod, T. S., Becker, A., ...
The MACHO collaboration has recently analyzed 2.1 years of photometric data for about 8.5 million stars in the Large Magellanic Cloud (LMC). This analysis has revealed 8 candidate microlensing events...
MACHO Project Photometry of RR Lyrae Stars in the Sgr Dwarf Galaxy (1996)
Alcock, C., Allsman, R. A., Alves, D. R., Axelrod, T. S., Becker, A., Bennett, D. P., ...
We report the discovery of 30 type a,b RR Lyrae (RRab) which are likely members of the Sagittarius (Sgr) dwarf galaxy. Accurate positions, periods, amplitudes and magnitudes are presented. Their...
Alcock, C., Allsman, R. A., Alves, D., Axelrod, T. S., Becker, A., Bennett, D. P., ...
The MACHO project has been monitoring about ten million stars in the Large Magellanic Cloud in the search for gravitational microlensing events caused by massive compact halo objects (Machos) in the...
The MACHO Project LMC Variable Star Inventory: III. New R Coronae Borealis Stars (1996)
Alcock, C., Allsman, R. A., Alves, D. R., Axelrod, T. S., Becker, A., Bennett, D. P., ...
We report the discovery of two new R Coronae Borealis (RCB) stars in the Large Magellanic Cloud (LMC) using the MACHO project photometry database. The identification of both stars has been confirmed...
The MACHO Project: 45 Candidate Microlensing Events from the First Year Galactic Bulge Data (1995)
Alcock, C., Allsman, R. A., Axelrod, T. S., Bennett, D. P., Cook, K. H., Freeman, K. C., ...
We report the detection of 45 candidate microlensing events in fields toward the Galactic bulge. These come from the analysis of 24 fields containing 12.6 million stars observed for 190 days in 1993....
The MACHO Project Dark Matter Search (1995)
Bennett, D. P., Alcock, C., Allsman, R. A., Axelrod, T. S., Cook, K. H., Freeman, K. C., ...
We provide a status report on our search for dark matter in our Galaxy in the form of massive compact halo objects (or Machos), using gravitational microlensing of background stars. This search uses...
The MACHO Data Pipeline (1995)
Axelrod, T. S., Allsman, R. A., Quinn, P. J., Bennett, D. P., Freeman, K. C., Peterson, B. A., ...
The MACHO experiment is searching for dark matter in the halo of the Galaxy by monitoring more than 20 million stars in the LMC and Galactic bulge for gravitational microlensing events. The hardware...
Real-time Detection of Gravitational Microlensing (1995)
Pratt, M. R., Alcock, C., Allsman, R. A., Alves, D., Axelrod, T. S., Becker, A., ...
Real-time detection of microlensing has moved from proof of concept in 1994 to a steady stream of events this year. Global dissemination of these events by the MACHO and OGLE collaborations has made...
First Observation of Parallax in a Gravitational Microlensing Event (1995)
Alcock, C., Allsman, R. A., Alves, D., Axelrod, T. S., Bennett, D. P., Cook, K. H., ...
We present the first detection of parallax effects in a gravitational microlensing event. Parallax in a gravitational microlensing event observed only from the Earth appears as a distortion of the...
Alcock, C., Allsman, R. A., Axelrod, T. S., Bennett, D. P., Cook, K. H., Freeman, K. C., ...
The MACHO collaboration reports on the analysis of our first year LMC data, 9.5 million light curves with an average of 235 observations each. Automated selection procedures give 3 events consistent...
MACHO COLLABORATION SEARCH FOR BARYONIC DARK MATTER VIA GRAVITATIONAL MICROLENSING (1995)
Griest, K., Alcock, C., Allsman, R. A., Axelrod, T. S., Bennett, D. P., Cook, K. H., ...
Results are presented from the MACHO collaboration gravitational microlensing search. The experiment and the nearly 50 microlensing events that have been detected are described. Limits on the...
Variable Stars in the MACHO Collaboration Database (1995)
Cook, K. H., Alcock, C., Allsman, R. A., Axelrod, T. S., Freeman, K. C., Peterson, B. A., ...
The MACHO Collaboration's search for baryonic dark matter via its gravitational microlensing signature has generated a massive database of time ordered photometry of millions of stars in the LMC and...
Cepheids in the Magellanic Clouds (1995)
Welch, D. L., Alcock, C., Bennett, D. P., Cook, K. H., Allsman, R. A., Axelrod, T. S., ...
In the past few years, the Magellanic Clouds have been the targets for several major variable star surveys. The results of these surveys are now becoming available and it is clear that a Renaissance...
EXPERIMENTAL LIMITS ON THE DARK MATTER HALO OF THE GALAXY FROM GRAVITATIONAL MICROLENSING. (1995)
Alcock, C., Allsman, R. A., Axelrod, T. S., Bennett, D. P., Cook, K. H., Freeman, K. C., ...
We have monitored 8.6 million stars in the Large Magellanic Cloud for 1.1 years and have found 3 events consistent with gravitational microlensing. We place strong constraints on the Galactic halo...
Application of Cubic Splines to the Spectral Analysis of Unequally Spaced Data (1994)
Akerlof, Carl W., Alcock, C., Allsman, R., Axelrod, T., Bennett, D. P., Cook, K. H., ...
http://deepblue.lib.umich.edu/bitstream/2027.42/58217/2/spline_vas.c
Bennett, D. P., Alcock, C., Allsman, R. A., Axelrod, T. S., Cook, K. H., Freeman, K. C., ...
We review recent gravitational microlensing results from the EROS, MACHO, and OGLE collaborations, and present some details of the very latest MACHO results toward the Galactic Bulge. The MACHO...
Alcock, C., Allsman, R. A., Axelrod, T. S., Bennett, D. P., Cook, K. H., Freeman, K. C., ...
We report the discovery of 45 beat Cepheids in the Large Magellanic Cloud (LMC) using the MACHO Project photometry database. The variables which are pulsating simultaneously in two radial modes are...
Theory of Exploring the Dark Halo with Microlensing 1: Power--Law Models (1994)
Alcock, C., Allsman, R. A., Axelrod, T. S., Bennett, D. P., Cook, K. H., Evans, N. W., ...
The detection of microlensing has opened the way for the development of new methods in galactic astronomy. This series of papers investigates what microlensing can teach us about the structure and...
Gravitational Microlensing Results from Macho (1994)
Sutherland, W., Alcock, C., Allsman, R., Axelrod, T., Bennett, D., Chan, S., ...
We provide a status report on our search for dark matter in our Galaxy in the form of massive compact halo objects (MACHOs), using gravitational microlensing of background stars. This search uses a...
Probable Gravitational Microlensing towards the Galatic Bulge (1994)
Alcock, C., Allsman, R., Axelrod, T., Bennett, D., Chan, S., Cook, K., ...
The MACHO project carries out regular photometric monitoring of millions of stars in the Magellanic Clouds and Galactic Bulge, to search for very rare gravitational microlensing events due to compact...
Possible Gravitational Microlensing Of A Star In The Large Magellanic Cloud (1993)
Alcock, C, Akerlof, CW, Allsman, RA, Axelrod, TS, Bennett, DP, Chan, S, ...
THERE is now abundant evidence for the presence of large quantities of unseen matter surrounding normal galaxies, including our own1,2. The nature of this 'dark matter' is unknown, except that it...
Possible Gravitational Microlensing of a Star in the Large Magellanic Cloud (1993)
Alcock, C., Akerlof, C. W., Allsman, R. A., Axelrod, T. S., Bennett, D. P., Chan, S., ...
There is now abundant evidence for the presence of large quantities of unseen matter surrounding normal galaxies, including our own$^{1,2}$. The nature of this `dark matter' is unknown, except that...
Patients with cancer holding their own records: a randomised controlled trial.
Drury, M, Yudkin, P, Harcourt, J, Fitzpatrick, R, Jones, L, Alcock, C, ...
BACKGROUND: The burden of cancer care in general practice is increasing. Patient-held records may facilitate effective, coordinated care, but no randomised controlled trials of their use in cancer...
Patients with cancer holding their own records: a randomised controlled trial.
Drury, M, Yudkin, P, Harcourt, J, Fitzpatrick, R, Jones, L, Alcock, C, ...
BACKGROUND: The burden of cancer care in general practice is increasing. Patient-held records may facilitate effective, coordinated care, but no randomised controlled trials of their use in cancer...
Variable Stars in the MACHO Collaboration Database
Kem H. Cook, C. Alcock, A. W. Rodgers, D. P. Bennett, J. Reimann, K. Griest, ...
. The MACHO Collaboration's search for baryonic dark matter via its gravitational microlensing signature has generated a massive 1 The MACHO Collaboration is a collaboration between the Lawrence...
The value of immunocytochemical methods in the differential diagnosis of anaplastic thyroid tumours.
Ralfkiaer, N., Gatter, K. C., Alcock, C., Heryet, A., Ralfkiaer, E., Mason, D. Y.
The practical usefulness of a panel of monoclonal antibodies recognising epithelial and lymphoid antigens has been evaluated on a series of 10 routinely processed thyroid tumours of uncertain origin....