VI/75 Merged Log of IUE Observations (1978Jan - 1992Dec)
MERGED LOG OF IUE OBSERVATIONS
NASA / ESA / SERC
ADC_Keywords: Observatory log; Spectra, ultraviolet
Mission_Name: IUE
Description:
The log contains data from January 26, 1978 through Dec. 92.
It is sorted by right ascension.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
merged 131 92761 The IUE Merged Log.
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Byte-by-byte Description of file: merged
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Bytes Format Units Label Explanations
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1- 12 A12 --- Object *Identification of object
14- 18 A5 --- PGM-ID *Observing Program Identification
20- 21 I2 h RAh *[0/24[? Right Ascension 1950 (hours)
22- 23 I2 min RAm *[0/60[? Right Ascension 1950 (minutes)
24- 26 I3 ds RAds *[0/600]? Right Ascension 1950 (deci-seconds)
28 A1 --- DE- *Declination 1950 (sign)
29- 30 I2 deg DEd *[0/90]? Declination 1950 (degrees)
31- 32 I2 arcmin DEm *[0/60]? Declination 1950 (minutes)
33- 34 I2 arcsec DEs *[0/60]? Declination 1950 (seconds)
35- 41 F7.3 mag Vmag *[]?=99.99 Visual Magnitude
43- 44 I2 --- IUE-CLAS *? IUE Object Class (see main header)
46- 47 A2 --- FESmode *FES Mode (BO/FO/FU/SO/SU)
49- 53 I5 ct FEScount *? FES Counts
55- 57 A3 --- Camera *[LSWRPFE] IUE Camera (LWR/LWP/SWR/SWP/FES)
59- 63 I5 --- Image *[501/49719]? IUE Image number
65 A1 --- Entry *[0-4] Relates entry in HOI with aperture used
67 A1 --- Dispersn *[LHDEFPS] Dispersion (High, Low, other
for FES)
68 A1 --- Aperture *[LS12] Aperture (Large, Small, D for FES)
69 A1 --- LAPstat *[OC] Large apert. status (Open, Closed)
70 A1 --- EXP-MODE *[MT] Mode of exposure (Multiple, Trailed)
71- 77 A7 "m:s" EXPtime *[0-9:] Exposure time
79- 86 A8 "DD/MM/YY" DATE-OBS *[0-9/] Date of observation (UT)
88- 95 A8 "h:m:s" TIME-OBS *[0-9:] Time of observation (UT)
97 A1 --- Station *[GV] Observing station (GSFC or VILSPA)
99-106 A8 "DD/MM/YY" DATE-PRO *[0-9/] Last Processing Date
108-110 A3 --- ExpCC *Exposure Classification Code of VILSPA (CEB)
112-131 A20 --- Comments *Comments
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Note on Object: -> Field controlled and monitored by the IUE project
Note on PGM-ID: -> Field controlled and monitored by the IUE project
Note on RAh : -> Field controlled and monitored by the IUE project
Note on RAm : -> Field controlled and monitored by the IUE project
Note on RAds : -> Field controlled and monitored by the IUE project
record #19324 (Object 0511-230) has a uncorrectable value
of 845 in this field
Note on DE- : -> Field controlled and monitored by the IUE project
Note on DEd : -> Field controlled and monitored by the IUE project
Note on DEm : -> Field controlled and monitored by the IUE project
Note on DEs : -> Field controlled and monitored by the IUE project
Note on Vmag : from Jan. 18, 1983 the magnitude for VILSPA images
is estimated from FES counts and FES tracking mode
(see ESA IUE Newsletter no. 5, pg. 30, 1980)
Note on IUE-CLAS: see below the complete list of IUE classes
Note on FESmode : -> Field controlled and monitored by the IUE project
targets brightness as measured by the FES in primary mode
at the time of target acquisition. Mode designations:
FU = Fast track/Underlap
FO = Fast track/Overlap
SO = Slow track/Overlap
Note on FEScount: -> Field controlled and monitored by the IUE project
Counts are photon counts averaged over an integration
time dependent on the needs of target acquisition.
The FES detector saturates at a count of 28673 !
Note on Camera : -> Field controlled and monitored by the IUE project
LWP Long Wavelength Prime Camera (Camera no.1)
LWR Long Wavelength Redundant Camera (Camera no.2)
SWP Short Wavelength Prime Camera (Camera no.3)
SWR Short Wavelength Redundant Camera (Camera no.4)
FES Fine Error Sensor star field images (Camera no.9)
Note on Image : -> Field controlled and monitored by the IUE project
Note on Entry : -> Field controlled and monitored by the IUE project
Related essentially with the aperture used
Note on Dispersn: -> Field controlled and monitored by the IUE project
High (H) or Low (L).
For FES: D - Default (10 arcmin square)
E - Extended (16 arcmin square)
F - Full (18 arcmin square)
P - Postage stamp (usually 1 arcmin square)
S - Special (optional)
Note on Aperture: -> Field controlled and monitored by the IUE project
the 10 by 20 arc second large oval aperture (L) or
the 3 arc second small circular aperture (S)
For FES images: 2 - FES unit 2 (normal operational use)
1 - FES unit 1
Note on LAPstat : -> Field controlled and monitored by the IUE project
Open (O) or Closed (C)
Note on EXP-MODE: -> Field controlled and monitored by the IUE project
Beginning March 12, 1982 for GSFC and Oct. 1982 for VILSPA.
trailed images are flagged with a 'T' in this field,
multiple exposures are flagged with an 'M'.
* a few records have a numeric value in this field:
#6959(3), 47554(4), 67956(3), 68354(5), 68355(5),
68462(2), 83569(4)
Note on EXPtime : -> Field controlled and monitored by the IUE project
minutes and seconds - images exposed for less than
1 second will have zero exposure length in log.
For FES images: the dwell time per sample is indicated
in this field as
dwell time (millisec) = 1024/Exp.time(min)
Note on DATE-OBS: -> Field controlled and monitored by the IUE project
Note on TIME-OBS: -> Field controlled and monitored by the IUE project
start time in UT
Note on Station : -> Field controlled and monitored by the IUE project
G - image taken at GSFC; V - image taken at VILSPA
Note on DATE-PRO: -> Field controlled and monitored by the IUE project
the last date the image was processed. The state
of the image processing system at both ground stations
as a function of time is documented in the IUE Newsletter.
The most detailed information appeared in
NASA IUE Newsletter no. 25 and
ESA IUE Newsletter no. 14 & 21
Note on ExpCC : Exposure Classification Code of VILSPA:
The exposure levels of VILSPA images are described by
a 3-digit number:
Digit 1: Exposure level of continuum
Digit 2: Exposure level of emission lines
Digit 3: Background level
The exposure levels take the following values:
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 sat., 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
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.
0 = 0 < dn < 20
1 = 21 < dn < 30
2 = 31 < dn < 40
3 = 41 < dn < 50
4 = 51 < dn < 60
5 = 61 < dn < 70
6 = 71 < dn < 80
7 = 81 < dn < 90
8 = 91 < dn < 110
9 = 101 < dn < ...
X = saturated
Note on Comments: as provided by the Resident Astronomer:
For GSFC and VILSPA images taken before March 13,1982
widened spectra obtained by trailing the star along
the major axis of the large aperture is so indicated.
As of that date, GSFC trailed images are identified
only in the aperture field, while VILSPA trailed
continue to be noted as such in the comments.
For GSFC images taken after April 21, 1979 the
following information is given:
E - gross exposure level in DN for strongest emission
lines in spectrum
C - gross DN value for the most highly exposed region
of the continuum
B - average DN value for the background
N - peak DN value for the microphonic noise
List of IUE Classes:
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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 WC 60 Shell Star
11 WN 61 Eta Carinae
12 Main Sequence O 62 Pulsar
13 Supergiant O 63 Nova-like
14 Oe 64 Other stellar Object
15 Of 65 Misidentified targets
16 sdO 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 1Feb79)
45 G I-II (from 1Feb79)
46 K (to 1Feb79); K IV-VI (from 1Feb79)
47 K I-III (from 1Feb79)
48 M (to 1Feb79); M Dwarfs (from 1Feb79)
49 M I-III (from 1Feb79)
50 R, N or S types
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Historical Notes: A few errors have been corrected at CDS:
* realignment of magnitudes in column Vmag
* EXP-MODE had a control character (^X) for record #2256; a blank was
substituted.
* invalid values for column "Dispersn" have been changed into 'D'
for records #39893, 51488, 51491, 51506, 60224, 68462
* right ascension corrected for record #79595 (V404 CYG)
* right ascension corrected for record #92292 (BD+28 4211)
* realignment of count number in column FEScount
(End) Francois Ochsenbein [CDS] 22-Dec-1994