Astro 11 Laboratory Exercise - Hubble - The Hubble Redshift...

A Manual to Accompany Software for
the Introductory Astronomy Lab Exercise
Document SUG 3: Version 1
Department of Physics
Gettysburg College
Gettysburg, PA 17325
Telephone: [phone]
email: [email protected]
Contemporary Laboratory
Experiences in Astronomy
The Hubble Redshift Distance Relation
Software Users’ Guide

Contents
I. Introduction .................................................................................................................................... 2
I-2. Acknowledgements ................................................................................................................................................. 2
II. System Requirements ................................................................................................................... 2
III. Installation and Operation .......................................................................................................... 2
IV. Files Included With Exercise ...................................................................................................... 2
V. User Options ................................................................................................................................... 4
V-1. Parameters and Selectable Options ....................................................................................................................... 4
V-2. Galaxy Image Bitmaps .......................................................................................................................................... 5
V-3. Data (.DAT) Files .................................................................................................................................................. 5
V-3.2. Field Data Files .......................................................................................................................................... 6
V-3.3. Galaxy Image List File ............................................................................................................................... 7
V-3.4. Field Coordinates and Angular Size ........................................................................................................... 8
VI. Astronomical Data, Models, and Algorithms ........................................................................... 8
VI-1. Star Images .......................................................................................................................................................... 8
VI-2. Galaxy Images ..................................................................................................................................................... 9
VI-3. Observed Quantities ..................................................................................................................................... 9
Appendix ........................................................................................................................................... 10
THE GENSTARS PROGRAM ................................................................................................................................... 10
References .......................................................................................................................................... 11

Version 1.0
Page 3
I. Introduction
I-1. Purpose
This document provides specific technical information for users of the CLEA software module “The Hubble Redshift -
Distance Relation”. It includes discussions of hardware and operating system requirements (Section II.; software
installation and operation (Section III.; files associated with the exercise (Section IV.; user options and file formats for
possible user modifications (Section V.; and astronomical data, models and algorithms employed in the exercise (Section
VI). The material in this guide is intended for use by the instructor and by other personnel involved in installing and
configuring the exercise software and PC hardware. It is not intended for distribution to the students. (The word “user”
when it appears herein should be interpreted as “instructor”, and not “student”).
Readers of this document are assumed to have available the CLEA Software for Windows Technical Guide, which
contains technical information that applies to all CLEA Windows software. Information contained therein is not repeated
here.
I-2. Acknowledgements
Development of CLEA exercises and materials, including this guide, is supported in part by National Science Foundation
Grant USE 9155927 and by Gettysburg College.
II. System Requirements
This software runs on IBM and compatible PCs under Microsoft Windows 3.0/3.1. It requires a hard disk with at least
1.5 MByte of available storage, and a color VGA monitor. For additional information on systems requirements, including
a discussion of color modes and video drivers, see the CLEA Software for Windows Technical Guide.
III. Installation and Operation
All files for this exercise are compacted into the distribution file CLEA_HUB.ZIP. They must be extracted using the
PKUNZIP program (also included on the distribution diskette). and placed together in a single directory, such as
C:\HUB_LAB. Details of unpacking, running, and installing this software under Windows are given in the CLEA
Software for Windows Technical Guide.