2003A&A...405...15P

Query : 2003A&A...405...15P

2003A&A...405...15P - Astronomy and Astrophysics, volume 405, 15-21 (2003/7-1)

The POINT-AGAPE survey: 4 high signal-to-noise microlensing candidates detected towards M 31.

PAULIN-HENRIKSSON S., BAILLON P., BOUQUET A., CARR B.J., CREZE M., EVANS N.W., GIRAUD-HERAUD Y., GOULD A., HEWETT P., KAPLAN J., KERINS E., LE DU Y., MELCHIOR A.-L., SMARTT S.J. and VALLS-GABAUD D.

Abstract (from CDS):

We have carried out a survey of the Andromeda galaxy for unresolved microlensing (pixel lensing). We present a subset of four short timescale, high signal-to-noise microlensing candidates found by imposing severe selection criteria: the source flux variation exceeds the flux of an R=21 magnitude star and the full width at half maximum timescale is less than 25 days. Remarkably, in three out of four cases, we have been able to measure or strongly constrain the Einstein crossing time of the event. One event, which lies projected on the M 31 bulge, is almost certainly due to a stellar lens in the bulge of M 31. The other three candidates can be explained either by stars in M 31 and M 32 or by MACHOs.

Abstract Copyright: ∼

Journal keyword(s): galaxies: halo - galaxies: individual: M 31 - gravitational lensing - dark matter

Nomenclature: PA YY-WN (Nos 99-N2, 00-S3).

Simbad objects: 6

Full paper

View the references in ADS

Number of rows : 6

N	Identifier	Otype	ICRS (J2000) RA	ICRS (J2000) DEC	Mag U	Mag B	Mag V	Mag R	Mag I	Sp type	#ref 1850 - 2024	#notes
1	MEGA-ML 11	*	00 42 30.0	+40 53 46				20.62	20.62	~	9	0
2	PA 00-S3	*	00 42 30.51	+41 13 04.9				19.07	18.36	~	12	0
3	M 32	GiG	00 42 41.82480	+40 51 54.6120	9.51	9.03	8.08			~	2154	2
4	M 31	AGN	00 42 44.330	+41 16 07.50	4.86	4.36	3.44			~	12645	1
5	MEGA-ML 16	*	00 42 51.42	+41 23 53.7			22.00			~	13	0
6	MEGA-ML 7	*	00 44 20.89	+41 28 44.6						~	13	1

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