A Mid Infrared Search for Variable Stars in the Milky Way Galaxy
Brian Brooks
Advisor: Dr. Robert Benjamin
Contact me at: bbroo009@odu.edu


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A Mid Infrared Search for Variable Stars in the Milky Way Galaxy



Introduction

Data for variable sources were gathered using NASA's Spitzer Space Telescope. Onboard Spitzer, the IRAC (Infrared Array Camera) instrument allowed us to carry out a GLIMPSE (Galactic Legacy Infrared Midplane Extraordinaire) survey of the Milky Way Galaxy. Fig 1 shows the coverage map plotted from our two overlapped projects GLIMPSE and DEEP GLIMPSE.


Fig 1: Galactic coverage map (GLIMPSE red and Deep GLIMPSE white)

This is where the 27,703,930 matched sources were detected. They were detected in four IRAC bands from GLIMPSE (2004-2005) with bands of 3.6, 4.5, 5.8 and 8.0 mm and a sensitivity limit of m[4.5]=13.8 mag. DEEP GLIMPSE (2012-2013) was carried out with only bands 3.6 and 4.5 mm with sensitivity limit of m[4.5]=16.3 mag due to a detector issue with Spitzer. Out of the 27,703,930 matched sources approximately 100,998 were classified as being variable stars.

Useful links

The following links are very useful for looking up info on UNIX, web page making, and astrophysical data and journals.

SIMBAD (Stellar/Galactic database)

NED (Extragalactic database)

UNIX tutorial

Web page basics

NASA Astrophysics Data Service


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