MACHOs in M31? Absence of evidence but not evidence of absence

Kavli Affiliate: Geza Gyuk | Summary:We present results of a microlensing survey toward the Andromeda Galaxy (M31) carried out during four observing seasons at the Isaac Newton Telescope (INT). This survey is part of the larger microlensing survey toward M31 performed by the Microlensing Exploration of the Galaxy and Andromeda (MEGA) collaboration. Using a fully […]


Continue.. MACHOs in M31? Absence of evidence but not evidence of absence

HST Imaging of MEGA Microlensing Candidates in M31

Kavli Affiliate: Geza Gyuk | Summary:We investigate $HST$/ACS and WFPC2 images at the positions of five candidate microlensing events from a large survey of variability in M31 (MEGA). Three closely match unresolved sources, and two produce only flux upper limits. All are confined to regions of the color-magnitude diagram where stellar variability is unlikely to […]


Continue.. HST Imaging of MEGA Microlensing Candidates in M31