The assignment is split into two parts :
(1) Create a Hammer - Aitoff grid system suitable for plotting the position of objects in Galactic coordinates. You can refer to this write-up for help on how to create such a grid system. Hint: One approach to create the grid system is to draw lines of constant Gal. latitude (for different Gal. longitudes between -180 and +180 deg), followed by drawing lines of constant Gal. longitude (for Gal. latitudes between -90 and +90 deg). (2) Plot the position of point sources from the 2 micron all sky survey (2MASS) catalog. Instructions for downloading the 2MASS point source catalog is given below. Once you have the catalog, plot the location of the point sources in Galactic coordinates (in the Aitoff plot). Based on this exercise, come prepared to answer the following questions: (a) What could be these "point sources" in the 2MASS catalogue? (b) What can you infer by looking at their distribution in the Galaxy? For downloading the 2MASS Point Source Catalog (PSC), follow these steps
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