1
Space-Based Galaxy Survey Exposure Time Calculator
Version 10
User Manual & Code Description
Point of Contact:
Christopher M. Hirata
Caltech M/C 350-17, Pasadena, CA 91125, USA
chirata@tapir.caltech.edu
March 28, 2012
Table of Contents
1.
OVERVIEW......................................................................................................................................................2
2.
COMPILING THE CODE ...............................................................................................................................3
A.
A
DDITIONAL FLAGS
.......................................................... 3
3.
RUNNING THE CODE ...................................................................................................................................5
A.
S
PECIFYING THE TELESCOPE CONFIGURATION
........................................ 5
B.
T
ELESCOPE CONFIGURATION FILE FORMAT
.......................................... 7
C.
S
PECIFYING THE OBSERVING STRATEGY AND DETECTOR CHARACTERISTICS
..................... 8
D.
WL-
SPECIFIC INPUTS
....................................................... 10
E.
BAO-
SPECIFIC INPUTS
...................................................... 12
F.
PZCAL-
SPECIFIC INPUTS
.................................................... 15
4.
CODE OUTPUTS: WL ETC ........................................................................................................................ 15
5.
CODE OUTPUTS: BAO ETC ...................................................................................................................... 17
6.
CODE OUTPUTS: PZCAL ETC.................................................................................................................. 18
7.
DETAILED METHODOLOGY AND ASSUMPTIONS............................................................................ 19
A.
B
ACKGROUND COSMOLOGY
..................................................... 19
B.
S
KY BRIGHTNESS
.......................................................... 19
C.
G
ALACTIC EXTINCTION
...................................................... 20
D.
L
INE SENSITIVITY AND EFFECTIVE SOLID ANGLE
.................................... 20
E.
E
XPECTED VS
.
OBSERVED
SNR................................................. 22
F.
N
OISE MODEL
............................................................. 24
G.
T
HERMAL BACKGROUND MODEL
.................................................. 27
H.
G
ALAXY PROFILES
......................................................... 29
I.
P
OINT SPREAD FUNCTIONS
.................................................... 29
J.
E
LLIPTICITY UNCERTAINTY
................................................... 32
8.
DATA STRUCTURES AND FUNCTIONS ................................................................................................ 33
A.
D
ATA STRUCTURES
......................................................... 33
B.
I
NTERFACE FUNCTIONS
...................................................... 34
C.
S
PECIAL FUNCTIONS
........................................................ 34
D.
R
OUTINES TO SET UP DETECTOR PARAMETERS
....................................... 35
E.
R
OUTINES TO COMPUTE THE THROUGHPUT
.......................................... 35
