From jhkpci@rit.edu Thu Dec 21 15:15:03 2006 Date: Fri, 08 Dec 2006 10:57:26 -0500 From: Joel Kastner To: "cpg3287@rit.edu" , "krg0775@rit.edu" , "acl7695@rit.edu" , "rmp7773@rit.edu" , "cxw8453@rit.edu" Cc: "rxm9447@rit.edu" Subject: [UTF-8] first assignment for Funds Astro Imaging [ The following text is in the "UTF-8" character set. ] [ Your display is set for the "US-ASCII" character set. ] [ Some characters may be displayed incorrectly. ] Astronomical Imaging Fundamentals students (all 5 of you!): Here's your first assignment. Open a web browser and start the Aladin Sky Atlas. Hit 'load' and enter 'V1647 Ori' as the 'target'. You will get back a list of images. Click on '2MASS J(IR J)' (lambda=1.25 micron image) and then 'submit'. Then click on 'load' in the popup window. Repeat for the 'H' (1.65 microns) and 'K' (2.2 microns) images, so that all 3 are loaded in the stack. Now load the 2MASS Point Source Catalog: Click 'Catalogs: All VizieR' at the right side of the 'server selector window'. Click 'IR' under 'wavelength', then 'submit'. Click '2MASS All-Sky Catalog...' in the 'catalogs' popup window, then 'submit'. Now do some analysis, using the 2MASS images and PSC. (We'll go through and discuss these steps in class.) 1. In any image, measure out a 5'x5' or so region centered on V1647 Ori. (You can use the 'dist' button to help you determine how big 5 arcminutes is, on the images.) 2. Save the resulting list of 2MASS sources enclosed within this 5'x5' box. 3. Make a few plots/graphs from the magnitudes in the list: a) J magnitude vs. the J-K magnitude difference (aka J-K 'color') b) H vs. J-K b) K vs. J-K c) J-H vs. J-K 3. Now determine: a) the brightest object in the 2MASS PSC list within your 5'x5' region, at each wavelength (J, H, K) b) the faintest object in the 2MASS PSC list within the region at each wavelength c) the 2-3 "reddest" objects in the region as measured from the magnitude differences J-H and H-K (aka J-H and H-K 'colors') d) the 2-3 "bluest" objects in the region as measured from J-H and H-K colors e) the J-H and H-K colors of V1647 Ori Write up the procedure you followed to do the above steps (1-3) and the results, in rough draft form, and submit to me (as a Word doc or email w/ attached figs/tables as necessary) by class time next Friday (12/15). (If you like you can submit your rough-rough draft earlier so I have a chance to give you some feedback on it.) Be ready to present/discuss your results during that class. The rough draft you produce from the above exercise will be one in a series, all of which will feed into your final project report for the course. -Joel ** This email was sent from 1051.217.01 - Fund Astronomical Imag **