Astrocat Starcat Homepage

IUE: International Ultraviolet Explorer Satellite

General characteristics

Field descriptions

ra_ori

dec_ori

ra

dec

lii

bii

object

pgmid

vmag

class

date_obs

date_pro

disp

camera

image

aperture

fesmode

fescount

exp_mode

lapstat

exptime

station

expcc

comments

CLASS

Classification of objects in the joint ESA/SERC LOG of IUE observations. The classification is supplied by D. Stickland for use only within the project.
  00   Sun                                  51   Long Period Variable   
                                                 Stars                  
  01   Earth                                52   Irregular Variables    
  02   Moon                                 53   Regular Variables      
  03   Planet                               54   Dwarf Novae            
  04   Planetary satellite                  55   Classical Novae        
  05   Minor Planet                         56   Supernovae             
  06   Comet                                57   Symbiotic Stars        
  07   Interplanetary medium                58   T Tauri                
  08   Giant Red Spot                       59   X-Ray                  
  10   W C                                  60   Shell Star             
  11   W N                                  61   Eta Carinae            
  12   Main Sequence O                      62   Pulsar                 
  13   Supergiant O                         63   Nova-like              
  14   OE                                   64   Stellar Object not     
                                                 included above         
  15   OF                                   65   Misidentified targets  
  16   SD O                                 66   Interacting Binaries   
  17   WD O                                 70   Planetary Nebular +    
                                                 Central Star           
  19   UV-strong                            71   Planetary Nebular -    
                                                 Central Star           
  20   B0-B2 V-IV                           72   H II Region            
  21   B3-B5 V-IV                           73   Reflection Nebula      
  22   B6-B9,5 V-IV                         74   Dark Cloud             
                                                 (absorption spectrum)  
  23   B0-B2 III-I                          75   Supernova Remnant      
  24   B3-B5 III-I                          76   Ring Nebula            
                                                 (shock-ionised)        
  25   B6-B9.5 III-I                        80   Spiral Galaxy          
  26   BE                                   81   Elliptical Galaxy      
  27   Bp                                   82   Irregular Galaxy       
  28   SDB                                  83   Globular Cluster       
  29   WDB                                  84   Seyfert Galaxy         
  30   A0-A3 V-IV                           85   Quasar                 
  31   A4-A9 V-IV                           86   Radio Galaxy           
  32   A0-A3 III-I                          87   BL Lacertae object     
  33   A4-A9 III-I                          88   Emission Line Galaxy   
                                                 (non-Seyfert)          
  34   AE                                   90   Intergalactic Medium   
  35   AM                                   98   Wavelength             
                                                 Calibration (NASA      
                                                 Log)                   
  36   AP                                   99   Nulls and Flat Fields  
                                                 (NASA Log)             
  37   WDA                                                              
  38   Horizontal Branch                                                
  39   Composite                                                        
  40   F0-F2                                                            
  41   F3-F9                                                            
  42   FP                                                               
  43   Late Type Degenerate Stars                                       
  44   G (to 1Feb79); G IV-VI (from                                     
  45   G I-II (from 1Feb79)                                             
  46   K (to 1Feb79); K IV-VI (from                                     
  47   K I-III (from 1Feb79)                                            
  48   M (to 1Feb79); M Dwarfs (from                                    
  49   M I-III (from 1Feb79)                                            
  50   R, N or S types                                                  
  

EXPCODES

(The expcc field). Exposure classification codes for VILSPA images. The exposure levels of VILSPA images are described by a 3-digit number. The background is classified in terms of a standard region of each camera outside the area affected by the high resolution orders. The value used is the mean dn given by a subset histogram approximately 10 pixels in width.

	       00   lt dn lt 20
	       121  lt dn lt 30
	       231  lt dn lt 40
	       341  lt dn lt 50
	       451  lt dn lt 60
	       561  lt dn lt 70
	       671  lt dn lt 80
	       781  lt dn lt 90
	       891  lt dn lt 110
	       9101 lt dn lt ...                                 
	       Xsaturated                                      
	       
The continuum and emission are both classified as follows: (0 = not applicable).
  1. No spectrum visible
  2. Faint spectrum: max dn < 20 above local background
  3. Underexposed: Max dn < 100 above local background
  4. Weak: 100 < max dn < 150 above local background
  5. Good: no saturation, but max dn > 150 above local background
  6. a bit strong: a few pixels are saturated
  7. saturated for less than half the spectrum
  8. mostly saturated but some parts usable
  9. completely saturated

NOTES

  1. No exposure classification code was assigned to VILSPA images before 1 August 1978.
  2. Prior to 1 September 1979, the background digit was not included and the ECC occupied the first two places in the comment line.
  3. The Goddard images are described in the comments by the gross DN of the Continuum (C), Emission lines (E) and Background (B).