PDS_VERSION_ID = PDS3 RECORD_TYPE = STREAM OBJECT = TEXT NOTE = "AAREADME file for IUE Data Set Volume" PUBLICATION_DATE = 2001-03-01 END_OBJECT = TEXT END ***** File AAREADME.TXT Two groups of data (HIGH and LOW dispersion) are included in this volume. The data are LWR measurements of 18 comets observed by IUE. Added information is included from the Uniform Low Dispersion Archive Guide No. 2 (ESA SP1134), such as a General List of comet observations from 1978-1989. The data files were collected from IUEMAST. A FITS to PDS translator (F2P) has been used to create the detached PDS labels. The data were checked by manipulating the data with IDL routines created at the Small Bodies Node. In the DOCUMENT directory are explanatory text files as well as digitized versions (1&2) of the manuals in TEX or ASCII text with figures as JPG files. All document files and most labels contain an 80-byte fixed length record, with a carriage return (ASCII 13) and line feed (ASCII 10) as the 79th and 80th byte respectively. All the tabular files in the INDEX and DOCUMENT directory are formatted according to PDS standards. It should be noted that the index tables are formatted so that they may be read directly into many database management systems. All fields are separated by commas, and character fields are inclosed in double quotes ("). 49 comets were observed by the IUE during the period. Of these, 18 were observed using the LWR. The cpmplete list of comets is shown below, with the LWR comets marked by an asterisk (*): COMET IAU DESIG AREND-RIGAUX 1951 C2 * AUSTIN 82 1982 M1 * AUSTIN 90 1989 X1 * BORRELLY 81-| BORRELLY 87-|-----------------------------------1904 Y2 BORRELLY 94-| * BOWELL-SKIFF 1980 E1 * BRADFIELD 79X 1979 Y1 BRADFIELD 87 1987 P1 BRORSEN-METCALF 1847 O1 * CERNIS 1983 O1 * CHURYUMOV-GERASIMENKO 1969 R1 CROMMELIN 1928 W1 * D'ARREST 82-------------------------------------1851 M1 D'ARREST 95----| * ENCKE 80-| ENCKE 84-| ENCKE 87-|--------------------------------------1818 W1 ENCKE 90-| ENCKE 94-| FAYE 91 1843 W1 GIACOBINI-ZINNER 1900 Y1 * GRIGG-SKJELLERUP 1922 K1 HALE-BOPP 1995 O1 HALLEY 1682 Q1 HARTLEY-GOOD 1985 R1 HONDA-MRKOS-PAJDUSAKOVA 1948 X1 HYAKUTAKE 1996 B2 ICHIMURA 1987 W1 * IRAS-ARAKI-ALCOCK 1983 H1 * KOPFF 1906 Q1 LEVY 1991 L3 LEVY-RUDENKO 1984 V1 MACHHOLZ 2 1994 P1-A MCNAUGHT 1987 U3 MCNAUGHT-RUSSELL 1994 X1 * MEIER 80 1980 V1 METCALF-BREWINGTON 1906 V2 NISHIKAWA-TAKAMIZAWA-TAGO 1987 B1 OKAZAKI-LEVY-RUDENKO 1989 Q1 * PANTHER 1980 Y2 PONS-WINNECKE 1858 E1 SCHAUMASSE 1911 X1 SCHWASSMANN-WACHMANN 1 1927 V1 * SEARGENT 1978 T1 SHOEMAKER-LEVY 1991 T2 * STEPHAN-OTERMA 1942 V1 * SUGANO-SAIGUSA-FUJIKAWA 1983 J1 SWIFT-TUTTLE 1862 O1 TAKAMIZAWA 1984 O1 * TEMPEL 1 1867 G1 TEMPEL 2 1873 N1 * TUTTLE 1858 A1 WILSON 1986 P1 YANAKA 1989 A1 ZANOTTA-BREWINGTON 1991 Y1 An outline of the CD-ROM is shown in the table below: AAREADME.TXT Short introduction to CDROM contents VOLDESC.CAT Description of files on volume /CATALOG/*.CAT Mission, host, instrument, data set, & ref **************************************************************************** *DS - abbreviation for data set, used in filename for catalog *HOST - spacecraft or observatory (institution) that supports a mission *IN - abbreviation for instrument, used in filename for catalog *MSN - abbreviation for mission, used in filename for catalog REF - reference list as a catalog file ************************************************************************* /DOCUMENT/*.ASC,*.JPG,*.TEX Manuals and other information /OBSERVATION_LOG/*.ASC,*.JPG Digitized log pages for comet data /IUECAL/*.ASC,*.FIT Sensitivity calibration for archive /ULDA/*.ASC,*.JPG,*.TAB Uniform Low Dispersion Archive Guide No. 2 /EPHEM/*.ASC Ephemeris files for selected comets /INDEX/*.TAB Indexes by experiment or volume /DATA/HIGH/YYYY_CC/YEAR/INS/FILE/*.FIT High dispersion, year dir. optional /DATA/LOW/YYYY_CC/YEAR/INS/FILE/*.FIT Low dispersion, year dir. optional [YYYY_CC = IAU comet designation, see correspondence table given above INS = LWP,LWR,SWP FILE (Low) = MXLO,SILO,INES File (High) = MXHI, SIHI] Three forms of data may be included. The extracted spectra as binary tables (INES), resampled images (SILO, SIHI), and raw spectra (MXLO, MXHI). After data reached the Small Bodies Node, some file names were changed to meet ISO standards. The original files came in FITS format in the form filename.ines or filename.silo (sihi, mxlo, mxhi). As the new filenames had to end in the extension "FIT" then FITS became FIT, or for SILO (SIHI, MXLO, MXHI) the first characters of the old extension were used to replace the second two characters of the file name; thus SILO (MXLO, SIHI, MXHI) files could end in "FIT" and still be unique. For example: SWP12345.SILO -> SSI12345.FIT SWP12345.MXLO -> SMX12345.FIT The same holds true for LWP and LWR data. Small Bodies Node Department of Astronomy, University of Maryland College Park, MD 20742-2421 e-mail to pdssbn.astro.umd.edu; URL-http://pdssbn.astro.umd.edu