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VI/103 The Hopkins Ultraviolet Telescope (HUT) (GSFC, 1990-95)
The Hopkins Ultraviolet Telescope Hopkins Ultraviolet Telescope Team <Johns Hopkins University (1990, 1995)>
ADC_Keywords: Spectra, ultraviolet ; Observatory log Mission_Name: HUT Description: The Hopkins Ultraviolet Telescope HUT was one of three ultraviolet instruments of the ASTRO-1 mission flown on the space shuttle Columbia during 2-10 December 1990. 106 spectrophotometric observations of 77 targets were obtained in the far-UV (i.e., 912-1850Å) at a resolution of ∼3Å. A few sources were observed in the 415-912Å region with a 1.5Å resolution. The same three instruments were later flown on the space shuttle Endeavour from 3-17 March 1995 as part of the ASTRO-2 mission. During the longer ASTRO-2 mission, 385 observations of 265 targets were obtained. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file hutlist.dat 170 643 HUT Observation Log
See also: http://praxis.pha.jhu.edu/hut.html : the HUT Home page http://archive.stsci.edu/hut/ : the HUT at STScI. Byte-by-byte Description of file: hutlist.dat
Bytes Format Units Label Explanations
1- 8 A8 --- Target Name of the target as specified by HUT mission 10- 18 F9.5 deg RAdeg RA in J2000 decimal degrees 20- 28 F9.5 deg DEdeg DEC in J2000 decimal degrees 30- 37 A8 --- Pointid ASTRO Pointid (1) 39- 42 I4 --- Jotfid The first 4 digits of Pointid (1) 44- 79 A36 --- Category Translation of the the Science class (1) 80- 83 I4 yr Start.Y GMT date/time of starting observation (year) 84 A1 --- --- [-] 85- 86 I2 "month" Start.M GMT date/time of starting observation (month) 87 A1 --- --- [-] 88- 89 I2 d Start.D GMT date/time of starting observation (day) 90 A1 --- --- [T] 91- 92 I2 h Start.h GMT date/time of starting observation (hour) 93 A1 --- --- [:] 94- 95 I2 min Start.m GMT date/time of starting observation (minute) 96 A1 --- --- [:] 97- 98 I2 s Start.s GMT date/time of starting observation (second) 100-103 I4 s ExpTime The total exposure times in seconds. (2) 105-108 I4 s ExpDay Exposure time spacecraft day 110-113 I4 s ExpNight Exposure time during spacecraft night 115 I1 --- Door [1,7] Shutter Door State (4) 117 I1 --- Slit [0,7] Slit Position (5) 119-153 A35 --- Comments Comment generally related to S/N (3) 157 I1 --- ASTRO [1,2] Astro mission number 159-170 A12 --- Dataset Identification that identifies the dataset
Note (1): All three ASTRO missions assigned a unique pointing ID for each target Digit one - Science Class (see "Science Classes" section below) Digit two - Science Subclass (see "Science Classes" section below) Digits 3/4 - Target Numbers within Subclass Digit 5 - n => nth pointing at target with different roll or offset Digit 6 - 0 => only one pointing for target n => nth pointing Digits 5 and 6 often not available (a question mark is used) Note (2): the times do not reflect pointing problems. In many cases, the target was not in the aperture. Note (3): HUT-1 data includes a comment which usually refers to the quality of the signal-to-noise ratio (not available for HUT-2 data.) Note (4): Shutter Door State To observe brighter stars, the HUT telescope aperture could be reduced by closing one or two semi-circular shutter doors (full aperture size was 5120 cm2), and by opening either of two small apertures (although the 1 cm2 aperture was not employed during either mission). Changes made in HUT-2 software allowed 2 additional modes in which the shutter doors were partially closed. All the possible values are shown below: The values are: 1 = 1 cm2 small aperture 2 = 50 cm2 small aperture 3 = half aperture 4 = half aperture 5 = full aperture 6 = partial aperture 3.9% of full aperture 7 = partial aperture 14.6% of full aperture Note (5): Slit Positions Used to describe one of 8 aperture sizes and/or filters combinations as shown in the table below . The Al filter was used to reject first order FUV light and provide a pure EUV bandpass (i.e., 415-700Å), while the CaF2 filter excluded Lyman-alpha and all wavelengths below 1250Å. Note the aperture selection was revised for HUT-2, so the values in the database table have different meanings depending on which mission is referenced. The values are: ----------------------------------------------- HUT-1 HUT-2 ----------------------------------------------- 0 closed closed 1 30" diameter 12" diameter 2 9"x116" 32" diameter 3 30" Al filter 32" diameter Al filter 4 calibration hole calibration hole 5 18"x116" CaF2 filter 19"x197" 6 18"x116" 10"x56" 7 18" diameter 20" diameter -----------------------------------------------
Science Classes: the hierarchy of the classification is the following: 0 Calibration 0.0 HUT Camera Sensitivity Targets 0.1 HUT Spectrometer Focus Targets 0.2 HUT 0.3 UIT Flat Field Sources 0.4 UIT 0.5 WUPPE Aperture Position Calibrators 0.6 WUPPE Unpolarized & Polarized Standards 0.7 BBXRT Calibration Sources 0.8 BBXRT 0.9 Joint Focus and Alignment Targets 1 Solar System Objects 1.1 Comets 1.2 Planets 1.3 Asteroids, etc. 2 Individual Stars 2.1 Supergiants 2.2 Oe/Be Stars 2.3 Wolf-Rayet Stars 2.4 Rapid Rotators 2.5 Normal White Dwarfs 2.6 Magnetic/Pulsating W.D.'s 2.7 Planetary Nebula Nuclei 2.8 Normal Stars A0 & Later 3 Variable and Binary Stars 3.1 Pre-Main Sequence Stars 3.2 Cataclysmic Variables 3.3 Interacting Binaries 3.4 Symbiotic Stars 3.5 Active Chromospheres 3.6 Pulsating Variables 3.7 Low Mass X-Ray Binaries 3.8 High Mass X-Ray Binaries 3.9 X-Ray Transients 4 ISM & Nebulae 4.1 Planetary Nebulae 4.2 Reflection Nebulae 4.3 H II Regions 4.4 Super Nova Remnants 4.5 I.S. Polarization Probes 4.6 I.S. Absorption Probes (Nearby & Hot) 4.7 Herbig-Haro Objects 4.8 Dark Clouds 4.9 Diffuse Galactic X-Ray Emission Regions 5 Star Clusters 5.1 Metal Poor Globulars 5.2 Metal Rich Globulars 5.3 Open (Galactic) Clusters 5.4 O/B Associations 6 Normal Galaxies 6.1 Nearby Galaxies 6.2 Spirals 6.3 Ellipticals 6.4 Irregulars 6.5 Dwarfs 6.6 Edge On Systems 7 Abnormal Galaxies 7.1 Interacting Galaxies 7.2 Amorphous Galaxies 7.3 Rapid Star Formation 7.4 W/Circumgalactic Matter 7.5 E/S0 with I.S. Matter 7 X-Ray Miscellany 7.6 X-Ray Background 7.7 Unidentified X-Ray Sources 8 Active Extragalactic 8.1 Seyfert I Galaxies 8.2 Seyfert II Galaxies 8.3 Radio Galaxies 8.4 Radio Loud Quasistellar Objects 8.5 Radio Quiet Quasistellar Objects 8.6 BL Lacertae Objects 8.7 LINERs 8.8 Optically Violent Variable (OVV) Quasars 9 Clusters of Galaxies 9.1 Spiral Poor Clusters 9.2 Spiral Rich Clusters 9.3 X-Ray Selected Clusters 9.4 Deep Survey Fields 9.5 Cooling Flow Clusters 9 Spacecraft Specific 9.7 TAPS Tests 9.8 Gyros/IMC/IPS 9.9 Waterdumps/Handovers Acknowledgements: Karen Levay Randall Thompson
(End) Francois Ochsenbein [CDS] 28-Jun-2001
| The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line |
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