CANDIDATE MICROLENSING EVENTS FROM M31 OBSERVATIONS WITH THE LOIANO TELESCOPE

S. Calchi Novati; V. Bozza; F. De Paolis; Martin Dominik; G. Ingrosso; Ph. Jetzer; L. Mancini; A. Nucita; G. Scarpetta; M. Sereno; F. Strafella; A. Gould

doi:10.1088/0004-637X/695/1/442

CANDIDATE MICROLENSING EVENTS FROM M31 OBSERVATIONS WITH THE LOIANO TELESCOPE

S. Calchi Novati, V. Bozza, F. De Paolis, Martin Dominik, G. Ingrosso, Ph. Jetzer, L. Mancini, A. Nucita, G. Scarpetta, M. Sereno, F. Strafella, A. Gould

School of Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

Abstract

Microlensing observations toward M31 are a powerful tool for the study of the dark matter population in the form of MACHOs both in the Galaxy and the M31 halos, a still unresolved issue, as well as for the analysis of the characteristics of the M31 luminous populations. In this work, we present the second-year results of our pixel lensing campaign carried out toward M31 using the 152 cm Cassini telescope in Loiano. We have established an automatic pipeline for the detection and the characterization of microlensing variations. We have carried out a complete simulation of the experiment and evaluated the expected signal, including an analysis of the efficiency of our pipeline. As a result, we select 1-2 candidate microlensing events (according to different selection criteria). This output is in agreement with the expected rate of M31 self-lensing events. However, the statistics are still too low to draw definitive conclusions on MACHO lensing.

Original language	English
Pages (from-to)	442-454
Number of pages	13
Journal	Astrophysical Journal
Volume	695
Issue number	1
DOIs	https://doi.org/10.1088/0004-637X/695/1/442
Publication status	Published - 10 Apr 2009

Keywords

dark matter
galaxies: halos
galaxies: individual (M31, NGC 224)
Galaxy: halo
gravitational lensing
LARGE-MAGELLANIC-CLOUD
PHOTON IMAGING CAMERA
PIXEL LENSING SURVEY
ANDROMEDA GALAXY
XMM-NEWTON
UNRESOLVED STARS
STELLAR CONTENT
GALACTIC HALO
OPTICAL DEPTH
DARK-MATTER

Access to Document

10.1088/0004-637X/695/1/442

Wide Area Search for Planets: Project support for the Wide Area Search for Planets
Cameron, A. C. (PI)
Science & Technology Facilities Council
1/08/08 → 31/07/11
Project: Standard
Astrophysics at St Andrews: Astrophysics at St.Andrews
Cameron, A. C. (PI) & Horne, K. D. (CoI)
PPARC - Now STFC
1/04/06 → 31/03/11
Project: Standard

Cite this

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title = "CANDIDATE MICROLENSING EVENTS FROM M31 OBSERVATIONS WITH THE LOIANO TELESCOPE",

abstract = "Microlensing observations toward M31 are a powerful tool for the study of the dark matter population in the form of MACHOs both in the Galaxy and the M31 halos, a still unresolved issue, as well as for the analysis of the characteristics of the M31 luminous populations. In this work, we present the second-year results of our pixel lensing campaign carried out toward M31 using the 152 cm Cassini telescope in Loiano. We have established an automatic pipeline for the detection and the characterization of microlensing variations. We have carried out a complete simulation of the experiment and evaluated the expected signal, including an analysis of the efficiency of our pipeline. As a result, we select 1-2 candidate microlensing events (according to different selection criteria). This output is in agreement with the expected rate of M31 self-lensing events. However, the statistics are still too low to draw definitive conclusions on MACHO lensing.",

keywords = "dark matter, galaxies: halos, galaxies: individual (M31, NGC 224), Galaxy: halo, gravitational lensing, LARGE-MAGELLANIC-CLOUD, PHOTON IMAGING CAMERA, PIXEL LENSING SURVEY, ANDROMEDA GALAXY, XMM-NEWTON, UNRESOLVED STARS, STELLAR CONTENT, GALACTIC HALO, OPTICAL DEPTH, DARK-MATTER",

author = "{Calchi Novati}, S. and V. Bozza and {De Paolis}, F. and Martin Dominik and G. Ingrosso and Ph. Jetzer and L. Mancini and A. Nucita and G. Scarpetta and M. Sereno and F. Strafella and A. Gould",

year = "2009",

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doi = "10.1088/0004-637X/695/1/442",

language = "English",

volume = "695",

pages = "442--454",

journal = "Astrophysical Journal",

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TY - JOUR

T1 - CANDIDATE MICROLENSING EVENTS FROM M31 OBSERVATIONS WITH THE LOIANO TELESCOPE

AU - Calchi Novati, S.

AU - Bozza, V.

AU - De Paolis, F.

AU - Dominik, Martin

AU - Ingrosso, G.

AU - Jetzer, Ph.

AU - Mancini, L.

AU - Nucita, A.

AU - Scarpetta, G.

AU - Sereno, M.

AU - Strafella, F.

AU - Gould, A.

PY - 2009/4/10

Y1 - 2009/4/10

N2 - Microlensing observations toward M31 are a powerful tool for the study of the dark matter population in the form of MACHOs both in the Galaxy and the M31 halos, a still unresolved issue, as well as for the analysis of the characteristics of the M31 luminous populations. In this work, we present the second-year results of our pixel lensing campaign carried out toward M31 using the 152 cm Cassini telescope in Loiano. We have established an automatic pipeline for the detection and the characterization of microlensing variations. We have carried out a complete simulation of the experiment and evaluated the expected signal, including an analysis of the efficiency of our pipeline. As a result, we select 1-2 candidate microlensing events (according to different selection criteria). This output is in agreement with the expected rate of M31 self-lensing events. However, the statistics are still too low to draw definitive conclusions on MACHO lensing.

AB - Microlensing observations toward M31 are a powerful tool for the study of the dark matter population in the form of MACHOs both in the Galaxy and the M31 halos, a still unresolved issue, as well as for the analysis of the characteristics of the M31 luminous populations. In this work, we present the second-year results of our pixel lensing campaign carried out toward M31 using the 152 cm Cassini telescope in Loiano. We have established an automatic pipeline for the detection and the characterization of microlensing variations. We have carried out a complete simulation of the experiment and evaluated the expected signal, including an analysis of the efficiency of our pipeline. As a result, we select 1-2 candidate microlensing events (according to different selection criteria). This output is in agreement with the expected rate of M31 self-lensing events. However, the statistics are still too low to draw definitive conclusions on MACHO lensing.

KW - dark matter

KW - galaxies: halos

KW - galaxies: individual (M31, NGC 224)

KW - Galaxy: halo

KW - gravitational lensing

KW - LARGE-MAGELLANIC-CLOUD

KW - PHOTON IMAGING CAMERA

KW - PIXEL LENSING SURVEY

KW - ANDROMEDA GALAXY

KW - XMM-NEWTON

KW - UNRESOLVED STARS

KW - STELLAR CONTENT

KW - GALACTIC HALO

KW - OPTICAL DEPTH

KW - DARK-MATTER

U2 - 10.1088/0004-637X/695/1/442

DO - 10.1088/0004-637X/695/1/442

M3 - Article

SN - 0004-637X

VL - 695

SP - 442

EP - 454

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 1

ER -

CANDIDATE MICROLENSING EVENTS FROM M31 OBSERVATIONS WITH THE LOIANO TELESCOPE

Abstract

Keywords

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Projects

Wide Area Search for Planets: Project support for the Wide Area Search for Planets

Astrophysics at St Andrews: Astrophysics at St.Andrews

Cite this