2003A&A...405..851C


C.D.S. - SIMBAD4 rel 1.7 - 2020.01.21CET20:56:39

2003A&A...405..851C - Astronomy and Astrophysics, volume 405, 851-857 (2003/7-3)

Microlensing towards M 31 with MDM data.

CALCHI NOVATI S., JETZER P., SCARPETTA G., GIRAUD-HERAUD Y., KAPLAN J., PAULIN-HENRIKSSON S. and GOULD A.

Abstract (from CDS):

We report the final analysis of a search for microlensing events in the direction of the Andromeda galaxy, which aimed to probe the MACHO composition of the M 31 halo using data collected during the 1998-1999 observational campaign at the MDM observatory. In a previous paper, we discussed the results from a first set of observations. Here, we deal with the complete data set, and we take advantage of some INT observations in the 1999-2000 seasons. This merging of data sets taken by different instruments turns out to be very useful, the study of the longer baseline available allowing us to test the uniqueness that is characteristic of microlensing events. As a result, all the candidate microlensing events previously reported turn out to be variable stars. We further discuss a selection based on different criteria, aimed at the detection of short-duration events. We find three candidates whose positions are consistent with self-lensing events, although the available data do not allow us to conclude unambiguously that they are due to microlensing.

Abstract Copyright:

Journal keyword(s): methods: observational - methods: data analysis - cosmology: dark matter - cosmology: gravitational lensing - cosmology: observations - galaxies: individual: M 31

Nomenclature: Table 1: [CIM2002] N (No. 6) added. Tables 1, 2: [CJS2003] CN (Nos C1-C5).

CDS comments: Table 1: Objects T1 to T5 = [CIM2002] 1 to 5, so T6 is designated as [CIM2002] 6 in SIMBAD.

Simbad objects: 12

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Number of rows : 12

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 [CJS2003] C5 Lev 00 41 52.8 +41 17 18           ~ 1 0
2 [CJS2003] C3 Lev 00 42 12.5 +41 21 30           ~ 1 0
3 [CJS2003] C4 Lev 00 42 25.6 +41 26 27           ~ 1 0
4 [CIM2002] 5 Lev 00 42 39.1 +41 11 26           ~ 2 0
5 [CIM2002] 4 Lev 00 42 39.3 +41 06 53           ~ 2 0
6 M 31 G 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 10670 1
7 [CIM2002] 2 Lev 00 43 26.5 +41 13 16           ~ 2 0
8 [CIM2002] 1 Lev 00 43 27.4 +41 13 11           ~ 2 0
9 [CIM2002] 3 Lev 00 43 39.9 +41 18 41           ~ 2 0
10 [CJS2003] C2 Lev ~ ~           ~ 1 0
11 [CJS2003] C1 Lev ~ ~           ~ 1 0
12 [CIM2002] 6 Lev ~ ~           ~ 1 0

    Equat.    Gal    SGal    Ecl

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2020.01.21-20:56:39

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