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Article
Report number	astro-ph/9804321
Title	AGAPEROS : Searches for microlensing in the LMC with the Pixel Method; 2, Selection of possible microlensing events
Author(s)	Melchior, A.L. (Queen Mary, U. of London ; College de France) ; Afonso, C (CEA, DSM, Saclay ; DAPNIA, Saclay) ; Ansari, R (Orsay, LAL) ; Aubourg, E. (CEA, DSM, Saclay ; DAPNIA, Saclay) ; Baillon, P. (CERN) ; Bareyre, P. (CEA, DSM, Saclay ; DAPNIA, Saclay) ; Bauer, F. (CEA, DSM, Saclay ; DAPNIA, Saclay) ; Beaulieu, J.-Ph. (Paris, Inst. Astrophys.) ; Bouquet, A. (College de France) ; Brehin, S. (CEA, DSM, Saclay ; DAPNIA, Saclay) ; Cavalier, F. (Orsay, LAL) ; Char, S. (La Serena U.) ; Couchot, F. (Orsay, LAL) ; Coutures, C. (CEA, DSM, Saclay ; DAPNIA, Saclay) ; Ferlet, R. (Paris, Inst. Astrophys.) ; Fernandez, J. (La Serena U.) ; Gaucherel, C. (CEA, DSM, Saclay ; DAPNIA, Saclay) ; Giraud-Heraud, Y. (College de France) ; Glicenstein, J.-F. (CEA, DSM, Saclay ; DAPNIA, Saclay) ; Goldman, B. (CEA, DSM, Saclay ; DAPNIA, Saclay) ; Gondolo, P. (College de France ; Munich, Max Planck Inst.) ; Gros, M. (DSM, DAPNIA, Saclay ; DAPNIA, Saclay) ; Guibert, J. (Paris Observ.) ; Hardin, D. (CEA, DSM, Saclay ; DAPNIA, Saclay) ; Kaplan, J. (College de France) ; de Kat, J. (CEA, DSM, Saclay ; DAPNIA, Saclay) ; Lachieze-Rey, M. (CEA, DSM, Saclay ; DAPNIA, Saclay) ; Laurent, B (CEA, DSM, Saclay ; DAPNIA, Saclay) ; Lesquoy, E (CEA, DSM, Saclay ; DAPNIA, Saclay) ; Magneville, Ch. (CEA, DSM, Saclay ; DAPNIA, Saclay) ; Mansoux, B. (Orsay, LAL) ; Marquette, J.-B. (Paris, Inst. Astrophys.) ; Maurice, E. (Unlisted, FR) ; Milsztajn, A. (CEA, DSM, Saclay ; DAPNIA, Saclay) ; Moniez, M. (Orsay, LAL) ; Moreau, O. (Paris Observ.) ; Moscoso, L. (CEA, DSM, Saclay ; DAPNIA, Saclay) ; Palanque-Delabrouille, N. (CEA, DSM, Saclay ; DAPNIA, Saclay) ; Perdereau., O. (Orsay, LAL) ; Prevot, L. (Unlisted, FR) ; Renault, C. (CEA, DSM, Saclay ; DAPNIA, Saclay) ; Queinnec, F. (CEA, DSM, Saclay ; DAPNIA, Saclay) ; Rich, J. (CEA, DSM, Saclay ; DAPNIA, Saclay) ; Spiro, M. (CEA, DSM, Saclay ; DAPNIA, Saclay) ; Vidal-Madjar, A. (Paris, Inst. Astrophys.) ; Vigroux, L. (CEA, DSM, Saclay ; DAPNIA, Saclay) ; Zylberajch, S. (CEA, DSM, Saclay ; DAPNIA, Saclay)
Publication	1998
Imprint	1998-04
Number of pages	14
In:	Astron. Astrophys.
Subject category	Astrophysics and Astronomy
Abstract	We apply the pixel method of analysis (sometimes called ``pixel lensing'') to a small subset of the EROS-1 microlensing observations of the bar of the Large Magellanic Cloud (LMC). The pixel method is designed to find microlensing events of unresolved source stars and had heretofore been applied only to M31 where essentially all sources are unresolved. With our analysis optimised for the detection of long-duration microlensing events due to 0.01-1 Mo Machos, we detect no microlensing events and compute the corresponding detection efficiencies. We show that the pixel method should detect 10 to 20 times more microlensing events for M>0.05 Mo Machos compared to a classical analysis of the same data which latter monitors only resolved stars. In particular, we show that for a full halo of Machos in the mass range 0.1 -- 0.5 Mo, a pixel analysis of the three-year EROS-1 data set covering 0.39 deg^2 would yield 4 events.

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