Examples of output file formats and glossary

  Descriptions of some of the abbreviations and headings used in the output files are shown below:

Angle

The angle of the major axis of a source (degrees).

Count

Mean ellipse brightness above the background (counts).

Dev

Estimated standard deviation of the mean ellipse brightness.

ECSB

Elliptical model estimated central surface brightness.

1/Ellipt

Reciprocal of the ellipticity of the ellipse (1=circle). The ellipticity is the ratio of the semi-major to the semi-minor axis, and so is related to the eccentricity, e, by $\mbox{ellipticity}=1/\sqrt(1-e^2)$.

Interp.

Modal value of smoothed histogram by fitting and interpolation.

MeanRad

`Mean radius' of the ellipse. This is the square-root of the product of the semi-major and semi-minor axes, or the radius of a circle with the same area as the ellipse (arcsecs).

NxSin

1st to 4th sine component of the Fourier descriptor.

NxCos

1st to 4th cosine component of the Fourier descriptor.

PA

Position angle of the ellipse semi-major axis (degrees).

Peak

Maximum count of the model source.

Points

ELLPRO. The number of points in the trial ellipse employed.

Points

ELLFOU. The number of image pixel employed.

PPU

Percentage of trial ellipse pixels that were available.

Proj.

Modal value of smoothed histogram by taking chords.

Raw

Modal value of unsmoothed count histogram.

Sa

Standard deviation of source in major axis.

Sb

Standard deviation of source in minor axis.

SCSB

Spiral model estimated central surface brightness.

Sdev.

Standard deviation of the pixel values.

Sigma.

Width of the smoothed histogram peak.

SLenS

Scale length (arc secs) of the spiral model fit.

SLenE

Scale length (arc secs) of the elliptical model fit.

Smoothed

Modal value of smoothed count histogram.

X/Y

The x and y co-ordinate of the centre on the image (Base frame).

Xc/Yc

The x and y co-ordinate of the centre on the image (Current frame).

The output file examples are shown on the following pages.

ELLPRO output text file.

## ESP ELLPRO V1.1 OUTPUT FILE
##
## Filename: 
/local2/data/esp/ic3374c
## Sigma (counts): 
12.07
## Pixel size (arc secs): 
0.9605179
## X/Y co-ordinates (Base):
93.0503 95.97249
## X/Y co-ordinates (SKY):
-11:23:21.6 62:13:08
## Background (counts): 
760.5
## Zero point of magnitude:
27.5
## Number of points:
11
## Ellipse Parameters:
!! X       Y     Points   Rad(a)   Count     PA     Ellipt   Dev   PPU  Statistic
  93.2    96.5     64      5.50     139.0   -21.5   0.558     1.0  100.     899.5
  93.0    96.1     20      0.75     212.3   -26.0   0.141     0.7  100.     972.8
  92.9    96.2     20      1.25     211.2   -26.0   0.141     0.8  100.     971.7
  93.2    96.1     48      4.25     163.6   -26.0   0.580     1.3  100.     924.1
  93.2    96.4     76      6.25     120.3   -16.9   0.584     0.9  100.     880.8
  93.5    96.3    100      8.25      79.6   -14.9   0.602     0.6  100.     840.1
  93.3    95.9    124     10.25      57.7   -17.8   0.587     0.6  100.     818.2
  93.5    96.0    164     13.25      36.4   -27.0   0.575     0.7  100.     796.9
  93.5    96.1    236     19.25      13.4   -15.9   0.626     0.5  100.     773.9
  93.5    96.1    280     22.75      12.4   -12.7   0.528     0.5   91.     772.9
  93.3    95.9    332     26.75       3.7   -12.9   0.643     0.5   90.     764.2
## Fourier Descriptors
!! Rad(a)   1xSin   1xCos   2xSin   2xCos   3xSin   3xCos   4xSin   4xCos
     5.50   -0.011   0.000  -0.009   0.011   0.043   0.053  -0.018  -0.010
     0.75   -0.006  -0.013  -0.001  -0.014   0.000   0.002   0.000   0.003
     1.25   -0.008  -0.015  -0.003  -0.011   0.000   0.006   0.000   0.006
     4.25   -0.003  -0.002  -0.017   0.013   0.062   0.026  -0.001  -0.004
     6.25   -0.022  -0.005  -0.026   0.010   0.018   0.048  -0.034  -0.034
     8.25   -0.004  -0.030   0.004   0.002  -0.015  -0.005  -0.035  -0.042
    10.25    0.059   0.014   0.005   0.012  -0.043  -0.015   0.021  -0.009
    13.25    0.041  -0.084   0.135  -0.044  -0.024   0.078  -0.065  -0.026
    19.25   -0.246  -0.060   0.004   0.044   0.066   0.013   0.059  -0.075
    22.75   -0.175  -0.311  -0.190   0.121   0.070  -0.039   0.090   0.018
    26.75   -0.113  -0.219  -0.070   0.136   0.183   0.224  -0.417  -0.650
!! NOTE: Radii values are stored on file as semi-major axis length
!!       measured in pixels but on screen as equivalent radii in arc secs.
!! NOTE: Position angles are stored on file with origin upward and clockwise 
!!       rotation positive.
## END

Some results have been deleted to allow this file to fit on one sheet of paper.

ELLFOU output text file.

## ESP ELLFOU V1.1 OUTPUT FILE
##
## Filename: 
ic3374c                                                   
## Sigma (counts): 
12
## Pixel size (arc secs): 
0.9605179
## X/Y co-ordinates (Base):
93.09997 96.09995
## X/Y co-ordinates (PIXEL):
92.59997 95.59995
## Background (counts): 
760
## Zero point of magnitude:
27.5
## Number of points:
10
## Ellipse Parameters:
!! X       Y     Points  Rad(a)     Count     PA     Ellipt     Dev   PPU       
  93.1    96.1     15     2.40       189.2   -37.0   0.609       2.8  100.      
  93.2    96.3     15     4.22       155.5   -25.5   0.544       4.6  100.      
  93.2    96.4     14     4.52       150.5   -21.3   0.561       4.4  100.      
  93.2    96.3     25     5.77       128.6   -23.1   0.502       5.3  100.      
  93.1    96.2     24     6.20       114.3   -19.3   0.604       4.9  100.      
  93.1    96.2     46     8.46        75.9   -18.3   0.579       4.0  100.      
  93.2    96.3     61     8.99        65.9   -18.2   0.621       3.1  100.      
  93.1    96.2     84    10.12        52.2   -20.1   0.647       2.6  100.      
  93.3    96.6    137    13.65        36.1   -19.0   0.528       2.3  100.      
  92.5    95.8    144    17.03        13.3   -60.1   0.712       1.4  100.      
## Fourier Descriptors:
!! Rad(a)   1xSin   1xCos   2xSin   2xCos   3xSin   3xCos   4xSin   4xCos       
     2.40  -0.019  -0.048  -0.053  -0.105  -0.022   0.007  -0.015   0.012       
     4.22  -0.017   0.003  -0.135  -0.235  -0.018   0.001   0.014   0.063       
     4.52  -0.019  -0.046  -0.168  -0.179  -0.019   0.014   0.031   0.040       
     5.77  -0.002   0.012  -0.216  -0.282  -0.027   0.013   0.051   0.042       
     6.20   0.024   0.070  -0.284  -0.207  -0.037   0.002   0.064   0.010       
     8.46   0.047   0.032  -0.379  -0.321  -0.031  -0.021   0.113  -0.028       
     8.99   0.054  -0.053  -0.385  -0.240  -0.017   0.000   0.111  -0.040       
    10.12   0.102  -0.070  -0.428  -0.247  -0.001  -0.036   0.120  -0.039       
    13.65   0.022  -0.090  -0.495  -0.523  -0.081   0.006   0.219  -0.042       
    17.03   0.063   0.258  -0.272  -1.155  -0.077  -0.113   0.146   0.499       
!! NOTE: Radii values are stored on file as semi-major axes length              
!!       measured in pixels but on screen as effective radii in arc secs.       
!! NOTE: Position angles are stored on file with origin upward and clockwise
!!       rotation positive.
## END

Some results have been deleted to allow this file to fit onto one sheet of paper.

SECTOR output text file.

## ESP SECTOR V1.1 OUTPUT FILE 
##
## Filename: 
ic3374c                                                   
## Background (counts):
760
## Sigma (counts):
12
## Pixel size (arc secs):
0.9605179
## X/Y co-ordinates (Base):
93 96
## X/Y co-ordinates (SKY):
-11:23:21.6 62:13:08
## Number of points:
24
## Zero point for magnitude:
27.5
## Spiral and elliptical scale lengths 
6.351797 2.3095597E-02
## Spiral and elliptical central brightness:
21.42383 13.98312
## Profile data:
!! Radius      Count     Above/Below Sky    Relative Magnitude 
      0.0       220.0       18.333             21.6                             
      1.0       210.2       17.521             21.7                             
      2.0       205.0       17.083             21.7                             
      3.0       181.1       15.094             21.9                             
      4.0       159.6       13.302             22.0                             
      5.0       134.4       11.200             22.2                             
      6.0       115.4        9.617             22.3                             
      7.0        90.6        7.554             22.6                             
      8.0        75.2        6.266             22.8                             
      9.0        66.1        5.506             22.9                             
     10.0        52.2        4.352             23.2                             
     12.0        38.5        3.212             23.5                             
     14.0        31.2        2.601             23.8                             
     16.0        21.7        1.810             24.2                             
     18.0        16.8        1.396             24.4                             
     20.0         8.3        0.691             25.2                             
     22.0        10.0        0.830             25.0                             
     24.0         9.0        0.748             25.1                             
     26.0         2.2        0.188             26.6                             
     28.0         3.3        0.276             26.2                             
     30.0         1.6        0.131             27.0                             
     32.0         4.3        0.361             25.9                             
     34.0         4.5        0.376             25.9                             
     36.0         4.3        0.358             25.9                             
## END

GRAPHS output text file.

## ESP GRAPHS V1.1 OUTPUT FILE 
##
## Filename: 
ic3374c                                                   
##  X       Y         Xc        Yc      SLenS    SLenE   SCSB  ECSB   LCCS  LCCE
   93.05   95.97 -11:23:21.6 62:13:08   5.0984   0.4906  21.5  19.4 0.991 0.827

LOBACK output text file.

## ESP LOBACK V1.1 OUTPUT FILE
##
## Filename: 
ic3374c                                                    
##  X         Y        Raw   Smoothed   Proj.    Interp.    Sdev.    Sigma.    
   100.2      99.8     784.0    774.0    780.4    772.6     46.3     17.1       
   160.7     158.0     756.0    757.0    755.0    757.5     11.1      7.1       
   162.2      31.8     765.0    762.0    764.8    762.1     10.9     13.7

GAUFIT output text file.

## ESP GAUFIT V1.1 OUTPUT FILE
##
## Filename: 
/local2/data/esp/hdf3                                                           
!! Algorithm: least-squares
## Sigma: 
!! fitted
15.98624
## Background: 
!! given
39
## Source Parameters:
!!  X           Y         Angle       FWHMa/as     FWHMb/as      Peak 
      306.2        57.2        12.7   0.268E+00    0.130E+00    0.264E+03
      168.1        46.2        50.8   0.206E+00    0.180E+00    0.158E+03
      182.9        85.4       115.0   0.185E+00    0.100E+00    0.114E+03
       34.8       341.8        96.0   0.489E+00    0.148E+00    0.832E+02
## Source Parameter Uncertainties:
  0.737E-01   0.360E-01   0.173E-01   0.523E-02    0.250E-02   -0.100E+01
  0.917E-01   0.869E-01   0.200E+00   0.809E-02    0.692E-02   -0.100E+01
  0.111E+00   0.179E+00   0.819E-01   0.152E-01    0.885E-02   -0.100E+01
  0.130E+00   0.438E+00   0.378E-01   0.710E-01    0.103E-01   -0.100E+01
## END