Final Merged Log of IUE Observations NASA / ESA / SERC <IUE Newsletters (1978-2000)>
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)
First Character (multiple exposures in the large aperture): N No multiple exposures made (most common case) A Multiple exposures along the APERTURE X X-offsets along FES X-axis for multiple exposures Y Y-offsets along FES X-axis for multiple exposures O Other configuration for multiple exposures Middle character (segmented exposure) N No, exposure taken by one commanded exposure (most common case) Y Yes, exposure was segmented Last character (trailed exposure) N No trail (most common case) X Exposure trailed along FES X-axis Y Exposure trailed along FES Y-axis
FU = Fast track/Underlap FO = Fast track/Overlap SO = Slow track/Overlap SU = Slow track/Underlap (HEASARC guess) BO = ? (not mentioned in CDS documentation)
00 Sun 50 R, N or S types 01 Earth 51 Long Period Variable Stars 02 Moon 52 Irregular Variables 03 Planet 53 Regular Variables 04 Planetary satellite 54 Dwarf Novae 05 Minor Planet 55 Classical Novae 06 Comet 56 Supernovae 07 Interplanetary medium 57 Symbiotic Stars 08 Giant Red Spot 58 T Tauri 59 X-Ray Source 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 19 UV-strong 69 Herbig-Haro Object 20 B0-B2 V-IV 70 Planetary Nebula + Central Star 21 B3-B5 V-IV 71 Planetary Nebula - Central Star 22 B6-B9,5 V-IV 72 H II Region 23 B0-B2 III-I 73 Reflection Nebula 24 B3-B5 III-I 74 Dark Cloud (absorption spectrum) 25 B6-B9.5 III-I 75 Supernova Remnant 26 Be 76 Ring Nebula (shock-ionised) 27 Bp 28 sdB 29 WDB 30 A0-A3 V-IV 80 Spiral Galaxy 31 A4-A9 V-IV 81 Elliptical Galaxy 32 A0-A3 III-I 82 Irregular Galaxy 33 A4-A9 III-I 83 Globular Cluster 34 Ae 84 Seyfert Galaxy 35 Am 85 Quasar 36 Ap 86 Radio Galaxy 37 WDA 87 BL Lacertae object 38 Horizontal Branch 88 Emission Line Galaxy (non-Seyfert) 39 Composite 40 F0-F2 90 Intergalactic Medium 41 F3-F9 42 Fp 43 Late Type Degenerate Stars 44 G IV-VI 45 G I-III 46 K IV-VI 47 K I-III 48 M Dwarfs 98 Wavelength Calibration Lamp 49 M I-III 99 Nulls and Flat FieldsThere is also one object in this catalog with an iue_class of 67 which appears to be a Herbig-Haro Object, and two objects with iue_class values of 95, the meaning of which is not stated in the CDS documentation.
Left Character (exposure levels of continuum) Middle Character (exposure levels of emission line) both are coded as following: 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 Right Character (background level). This 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 < 100 9 = 101 < dn < ... X = saturated
Notice: In the CDS documentation, the meaning of both the first and second characters of this parameter was stated to be the coded exposure level of the continuum: it appears to the HEASARC that this is a typographical error and that the second character refers to the exposure level of (usually the strongest intrinsic) emission line in the spectrum. Also, "dn" is the IUE data number, which has 256 possible values from 0 to 255.
A = Abnormal READ (ABNREAD) B = BAD Scans LWP (ABNBADSC) C = CORRUPTION including 159 DN H = History Play back (ABNHISTR) M = Missing THDA, any of THDAEND, THDAREAD, or THDASTRT N = Non-standard image acquisition ABNNOSTD O = OFFSET from nucleus; from center; etc. P = Readmode = PARTIAL R = REMNANT of previous spectrum visible S = Serendipity Exposure T = TRACK LOST U = UVC voltage other than -5Kev W = ABNHTRWU = LWR Heater Warm Up Z = contamination by solar spectrum or extended source 8 = Cross-correlation less than 80% - CC-PERCN
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