PAndromeda - first results from the high-cadence monitoring of M31 with Pan-STARRS 1

Abstract

The Pan-STARRS 1 (PS1) survey of M31 (PAndromeda) is designed to identify gravitational microlensing events, caused by bulge and disk stars (self-lensing) and by compact matter in the halos of M31 and the Milky Way (halo lensing, or lensing by MACHOs). With the 7 deg2 FOV of PS1, the entire disk of M31 can be imaged with one single pointing. Our aim is to monitor M31 with this wide FOV with daily sampling (20 mins/day). In the 2010 season we acquired in total 91 nights towards M31, with 90 nights in the rP1 and 66 nights in the iP1. The total integration time in rP1 and iP1 are 70740s and 36180s, respectively. As a preliminary analysis, we study a 40'\times40' sub-field in the central region of M31, a 20'\times20' sub-field in the disk of M31 and a 20'\times20' sub-field for the investigation of astrometric precision. We demonstrate that the PSF is good enough to detect microlensing events. We present light curves for 6 candidate microlensing events. This is a competitive rate compared to previous M31 microlensing surveys. We finally also present one example light curve for Cepheids, novae and eclipsing binaries in these sub-fields.

41 pages, 19 figures, 4 tables. Published in AJ

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Cited by in corpus (31)

• Cosmological Constraints from Measurements of Type Ia Supernovae discovered during the first 1.5 years of the Pan-STARRS1 Survey
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• Stellar mass map and dark matter distribution in M31
• The Pan-STARRS Data Processing System
• Variability of Red Supergiants in M31 from the Palomar Transient Factory
• Sculpting Andromeda -- made-to-measure models for M31's bar and composite bulge: dynamics, stellar and dark matter mass
• Small near-Earth asteroids in the Palomar Transient Factory survey: A real-time streak-detection system
• The stellar populations of the central region of M31
• Properties of M31. II: A Cepheid disk sample derived from the first year of PS1 PAndromeda data
• The M31 Near-Infrared Period-Luminosity Relation and its non-linearity for $\delta$ Cep Variables with $0.5\le \log (P)\le 1.7$
• The 64 Mpixel wide field imager for the Wendelstein 2m Telescope: Design and Calibration
• Cepheids in M31 - The PAndromeda Cepheid sample
• Panchromatic Hubble Andromeda Treasury XIII: The Cepheid period-luminosity relation in M31
• Supersoft X-rays reveal a classical nova in the M 31 globular cluster Bol 126
• Evidence for non-axisymmetry in M31 from wide-field kinematics of stars and gas
• Panchromatic Hubble Andromeda Treasury. XIV. The Period-Age Relationship of Cepheid Variables in M31 Star Clusters
• Properties of M31. V: 298 Eclipsing Binaries from PAndromeda
• Novae in Globular Clusters
• The Pan-STARRS 1 Discoveries of five new Neptune Trojans
• Properties of M31. III: Candidate Beat Cepheids from PS1 PAndromeda Data and Their Implication on Metallicity Gradient
• Optical-infrared flares and radio afterglows by Jovian planets inspiraling into their host stars
• Properties of M31. IV: Candidate Luminous Blue Variables from PAndromeda
• Variability of massive stars in M31 from the Palomar Transient Factory
• Testing DARKexp against energy and density distributions of Millennium-II halos
• M31 Pixel Lensing PLAN Campaign: MACHO Lensing and Self Lensing Signals
• Double-mode Cepheids in M31
• A Long-term photometric variability and spectroscopic study of luminous blue variable AF And in M31
• M31 PAndromeda Cepheid sample observed in four HST bands
• Microlensing towards the Magellanic Clouds and M31: is the quest for MACHOs still open?
• Limits on compact halo objects as dark matter from gravitational microlensing
• Variable Stars in M31 Stellar Clusters from the Panchromatic Hubble Andromeda Treasury