{"id":973,"date":"2013-01-11T21:46:25","date_gmt":"2013-01-11T17:46:25","guid":{"rendered":"http:\/\/sites.williams.edu\/kkwitter\/?page_id=973"},"modified":"2018-02-01T00:01:20","modified_gmt":"2018-01-31T20:01:20","slug":"a-402-observing-projects","status":"publish","type":"page","link":"https:\/\/sites.williams.edu\/kkwitter\/astronomy-402-between-the-stars\/a-402-observing-projects\/","title":{"rendered":"A 402T Observing Projects"},"content":{"rendered":"<address><em>last revised 1\/31\/18<\/em><\/address>\n<h2 style=\"text-align: center\"><strong>Project 1: Imaging the ISM<\/strong><\/h2>\n<h3 style=\"text-align: center\">due in lab, Monday, March 12<\/h3>\n<p>The high-level requirement is to demonstrate the presence of interstellar gas and\/or dust via broadband and\/or narrowband imaging. Possibilities include:<\/p>\n<ul>\n<li>Obtain a multicolor image of an emission nebula, e.g., M42, M27, or IC443.<\/li>\n<li>Obtain a multicolor image of a reflection nebula.<\/li>\n<li>Obtain a multicolor image of a galaxy with significant interstellar dust.<\/li>\n<li>Obtain a multicolor image of a dark nebula, showing both obscuration and reddening by interstellar dust.<\/li>\n<li>Using your own B-V differential photometry of at least 3 stars (plus at least 1 reference star known spectral type and low reddening), demonstrate the presence of interstellar reddening and therefore interstellar dust.<\/li>\n<li>Demonstrate the presence of interstellar hydrogen by imaging an appropriate object in H\u03b1 and nearby continuum.<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<p>This list is not exhaustive, so if you have other project ideas please discuss them with Dr. Souza to be sure that they are feasible. Projects may require late night or pre-dawn observations. All will require careful observation planning (ASTR211T skills), taking and processing data, and researching the object(s). You will need to submit a formal <a href=\"http:\/\/sites.williams.edu\/kkwitter\/course-web-pages\/astronomy-402-between-the-stars\/a-402-observing-projects\/observing-proposal-format\/\" target=\"new\">proposal<\/a> which will have to be approved before you do any observing. Your project <a href=\"http:\/\/sites.williams.edu\/kkwitter\/course-web-pages\/astronomy-402-between-the-stars\/a-402-observing-projects\/project-report-format\/\"> paper<\/a> and presentation should include a discussion of the images or data you obtained and how you analyzed them, and discussion of the object(s). Your grade will be based in part on how close you come to what is possible at our site, with our equipment. Poor weather will only be taken into consideration if you have made every reasonable effort to make use of the clear time that we do get this semester.<\/p>\n<h4><\/h4>\n<p>&nbsp;<\/p>\n<div class=\"hidden\">\n<h2 style=\"text-align: center\"><strong>Project 2: Characterizing the Ionized Gas in a Planetary Nebula<\/strong><\/h2>\n<h4 style=\"text-align: center\">Assigned\u00a0\u00a0Fri. 3\/9<br \/>\nFinished Project due Mon. 5\/7, including in-lab presentations<\/h4>\n<ul>\n<li style=\"list-style-type: none\">\n<ul>\n<li><span style=\"color: #000080\">For this project, teams are assigned a particular planetary nebula for which to obtain an optical spectrum (coverage from 3600-7200 \u00c5). The goals are to determine the density and temperature of the nebular gas, and to estimate nebular composition using techniques to be discussed in class.\u00a0<\/span><\/li>\n<li><b><span style=\"color: #000080\"> Since the Milky Way, and with it, many good targets, is becoming unavailable in the evening sky as the semester progresses, you are getting this assignment now so that you can obtain spectra for this project as soon as possible. The actual data analysis will wait until you have learned the necessary material.<\/span><\/b><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><strong><em>A and B<\/em><\/strong><br \/>\n<span style=\"color: #0000ff\"><b>IC 2165 (comparison star: \u03b3 Gem)<\/b><\/span><\/p>\n<p><strong><em>C and D<\/em><\/strong><br \/>\n<span style=\"color: #0000ff\"><b>J900 (comparison star: \u03b3 Gem or\u00a0\u03b5 Ori)<\/b><\/span><\/p>\n<p><strong><em>E and F<\/em><\/strong><br \/>\n<span style=\"color: #0000ff\"><b>NGC 2392 (comparison star: \u03b3 Gem) <\/b><\/span><\/p>\n<ul>\n<li><span style=\"color: #000080\">Dr. Souza will work with you to obtain and to extract a one-dimensional spectrum text file. I will transform the spectrum text file into a file that can be read by the analysis programs you will learn to use in class on April 4.<\/span><\/li>\n<li><span style=\"color: #000080\"><strong>There is no formal proposal required; instead, each team will submit answers to the following questions<\/strong>:<\/span><\/li>\n<\/ul>\n<ul>\n<li><span style=\"color: #000080\">Which emission lines could you use to determine the nebular temperature?\u00a0<\/span><\/li>\n<li><span style=\"color: #000080\">Which emission lines could you use to determine the nebular density?<\/span><\/li>\n<li><span style=\"color: #000080\">How will interstellar reddening affect the measured line strengths, and what, in principle, needs to be done to correct it?<\/span><\/li>\n<\/ul>\n<p><strong><em>Group 1<\/em>: \u00a0AAA and BBB &#8211; NGC 7027 or NGC 6884<\/strong><\/p>\n<p style=\"text-align: center\"><strong><em>Group 2<\/em>: \u00a0CCC and DDD &#8211; NGC 2392<\/strong><\/p>\n<p style=\"text-align: center\"><strong><em>Group 3: EEE and FFF<\/em>\u00a0&#8211; NGC 6210<\/strong><\/p>\n<hr \/>\n<p>&nbsp;<\/p>\n<h3><a href=\"http:\/\/sites.williams.edu\/kkwitter\/course-web-pages\/astronomy-402-between-the-stars\/a-402-observing-projects\/observing-proposal-format\/\" target=\"new\">Project Proposal format<\/a><\/h3>\n<h3><a href=\"http:\/\/sites.williams.edu\/kkwitter\/course-web-pages\/astronomy-402-between-the-stars\/a-402-observing-projects\/project-report-format\/\">Project Report Format<\/a><\/h3>\n<p>&nbsp;<\/p>\n<h4><strong><span style=\"color: #ff0000\">NOTE: TO BE UPDATED\u00a0<\/span><\/strong><span style=\"color: #000000\">Room 301 (to which you will all be assigned keys) will be\u00a0<\/span><strong><span style=\"color: #ff0000\">UNAVAILABLE<\/span><\/strong><span style=\"color: #ff0000\">\u00a0<\/span><span style=\"color: #ff0000\"><span style=\"color: #000000\">on the following dates and times, as well as other times that may be be determined by Dr. Souza:<\/span><\/span><\/h4>\n<p>Tue\/Wed Feb. 23,24 12:30-4:00 PM<\/p>\n<p>Tue\/Wed Mar. 15,16 12:30-4:00 PM<\/p>\n<p>Tue\/Wed Apr. 5,6 12:30-4:00 PM<\/p>\n<p>Tue\/Wed May 3,4 12:30-4:00 PM<\/p>\n<\/div>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>last revised 1\/31\/18 Project 1: Imaging the ISM due in lab, Monday, March 12 The high-level requirement is to demonstrate the presence of interstellar gas and\/or dust via broadband and\/or narrowband imaging. Possibilities include: Obtain a multicolor image of an emission nebula, e.g., M42, M27, or IC443. Obtain a multicolor image of a reflection nebula. [&hellip;]<\/p>\n","protected":false},"author":198,"featured_media":0,"parent":793,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"footnotes":""},"class_list":["post-973","page","type-page","status-publish","hentry"],"acf":[],"_links":{"self":[{"href":"https:\/\/sites.williams.edu\/kkwitter\/wp-json\/wp\/v2\/pages\/973","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sites.williams.edu\/kkwitter\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/sites.williams.edu\/kkwitter\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/sites.williams.edu\/kkwitter\/wp-json\/wp\/v2\/users\/198"}],"replies":[{"embeddable":true,"href":"https:\/\/sites.williams.edu\/kkwitter\/wp-json\/wp\/v2\/comments?post=973"}],"version-history":[{"count":97,"href":"https:\/\/sites.williams.edu\/kkwitter\/wp-json\/wp\/v2\/pages\/973\/revisions"}],"predecessor-version":[{"id":4338,"href":"https:\/\/sites.williams.edu\/kkwitter\/wp-json\/wp\/v2\/pages\/973\/revisions\/4338"}],"up":[{"embeddable":true,"href":"https:\/\/sites.williams.edu\/kkwitter\/wp-json\/wp\/v2\/pages\/793"}],"wp:attachment":[{"href":"https:\/\/sites.williams.edu\/kkwitter\/wp-json\/wp\/v2\/media?parent=973"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}