Try to finish this hunt by 4pm on Monday afternoon

Useful links:
  • Using Arecibo for ALFALFA
  • Using ALFALFA for science
  • Learn to use the ALFALFA digital data archive
  • ALFALFA catalog data
  • A2010 observer's page
  • Instructions for Level I processing of ALFALFA drift data
  • L-band wide observing       NEW!!
  • Cornell Digital HI archive
  • ALFALFA data releases

    Rules of the scavenger hunts:
            1.   Some questions are labeled (F: first timer) and (R: returnee). First time attendees should focus on the "F" questions; returnees on the "R" ones. Everyone should answer the questions without designations. In all cases, return attendees shall not reveal the answers to first timers until sufficient effort is expended. (And, any bribes must be shared 50:50 will the Scavenger Hunt creators.)
            2.   You may consult any source anywhere but please be sure to indicate where you got your information. And watch out for bad websites! Actually, if you find any mis-information, make a note of it for the blog.

    UAT12.01 Scavenger Hunt #1: Using Arecibo and using ALFA for ALFALFA

    This scavenger hunt will explore some details of how we use ALFA and how we use it for ALFALFA.

    1.0   Which of the ALFA beams are "uphill" when we observe next fall the ALFALFA drift at a Declination of +33o05'36" (drift 136p2)?

    1.1   We do not normally observe in the afternoon. Why not?

    1.2   Why are we using L-band wide (LBW) instead of ALFA tonight?

    1.3   What does J2000 refer to?

    1.4   What declination will correspond to each of the six ALFA beams when we observe next fall the ALFALFA drift 136p2 at a Declination of +33o05'36"? Be sure to indicate numerically each beam according to ALFA convention.

    1.5   At the current moment are the ALFA amps on or off? Be sure to record the exact time/date when you provide this answer.

    1.6   What is the LST time at 3:45 pm AST today (January 17, 2011)?

    1.7 (R)   What is the declination of the A2010 observation that was observed on March 21, 2010? Who conducted those observations?

    1.8 (F)   In what 1984 movie did the unsympathetic government agent say: "Do you seriously expect me to tell the President than an alien has landed, assumed the identity of a dead housepainter from Madison Wisconsin and is presently out tooling around the countryside in a hopped up orange and black 1977 Mustang?"

    1.9 (R)   In what 1942 movie did an observer report: "Dark object floating off starboard bow, sir."?

    1.10 (F)   The ALFALFA observing setup uses the WAPP spectrometers which deliver spectra which cover 100 MHz total, centered on 1385 MHz. Each spectrum has 4096 "channels" (or "pixels" in frequency space, or "array elements", however you want to think of them).

    1.11 (R)   The ALFALFA followup LBW observing setup uses the interim correlator which deliver spectra which cover 25 MHz total. The center frequency of the spectrum is shifted according to the observing mode. Each spectrum has 2048 "channels" (or "pixels" in frequency space, or "array elements", however you want to think of them).

    1.12   What is odd about the rotation of Venus, and how and when was that determined?

    1.13   What former Arecibo atmospheric scientist is the author of the mystery novel "Murder at Arecibo"?

    1.14 (R)   How strong is the strongest radio continuum source found within one degree of AGC 110977? (We may want to discuss how to go about answering this.)

    1.15   How should you start up IDL for use here at the workshop? Hint: follow this link

    1.16 (F)   Each team should investigate a galaxy detected by ALFALFA. Try out the LOVEDATA procedures plotalfa and skyd. Make a note of links where you were able to find information about the galaxy. Distinguish between observed properties and derived ones. Also develop a "wish list" of what more you'd like to know/do. These **are** interesting galaxies; what is interesting about them?

    TeamAGC #Position
    A 191298 094253.3 +092939
    B 6350 112016.9 +133513
    C 221026 124759.9 +105815
    D 7345 121849.5 +142459
    E 231980 135433.5 +041440

    Note: if you have time, you may want to run through the exercises on the Learning to use the ALFALFA digital archive page

    This page created by and for the members of the ALFALFA Survey Undergraduate team

    Last modified: Mon Jan 9 15:35:11 EST 2011 by martha