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January 1995                                 Volume 3, No. 1


This is an electronic newsletter edited by the IUE Data Analysis Center (IUEDAC)intended to inform the numerous remote and local users of the IUEDAC software of recent software updates and project changes.

  • As of th 26th of January 1995, it will be 17 years since IUE was launched.

  • The IUE Merged Observing Log may now be searched via the World Wide Web (WWW). This service is provided as a joint effort of the IUE Data Analysis Center (IUEDAC) and Astrophysics Data Facility (ADF). The information obtained from the Hyper-Text Markup Language (HTML) forms is used with many of the same IDL database procedures that SEARCH and W_SEARCH use; therefore, searches on only non-indexed and non-sorted fields - such as object name - will be as "painful" as always. The URL is: or it is available via a link on the IUEDAC homepage. If you have any problems or suggestions, please contact the IUEDAC staff. pjl

  • In response to some user inquiries, we have available for users a beta test version of a fortran program which will read NEWSIPS MXLO files. This program makes use of the FITSIO sub-routines written by Bill Pence of the High Energy Astrophysics Science Archival Research Center (HEASARC). Please contact Dr. Michael Carini for the software and further details. mtc

  • The IUE project now supports an anonymous ftp account on node IUE. The account is accessible using either ftp or DECnet commands such as COPY, DIR, etc. The account currently contains the VMS version of the IUEDAC IDL software stored as VMS BACKUP files, and the IUE public relation images stored in postscript format. A readme file stored in the top directory describes the current account structure. A readme.txt file also exists in the iuedac subdirectory which describes the BACKUP files containing the IUEDAC programs and how to restore them. Note that users accessing the VMS BACKUP files using FTP should have the MultiNet implementation of the FTP software on their local computer. If not, then DECnet commands should be used to access these files. Note that MultiNet is not required for accessing other files in this account. If you ftp to IUE (, specify "anonymous" for the username and give your e-mail address for the password. To obtain the IUEDAC IDL software, cd to iuedac. Be sure to specify "TYPE BACKUP" before GETting any of the .BCK files. To access the postscript files, cd to iuedac.images and transfer the files in binary mode. A readme.txt file in the images subdirectory will describe the contents of the postscript files. To access the account via DECnet you do not need to login to IUE. Just use the standard DECnet commands and the following syntax for the accessing the account: IUE::IUE$DKB0:[ANONYMOUS.IUEDAC]filename The DIR, COPY, and TYPE commands will all work when the file name(s) are specified in this manner. For example, to read the top level readme file, type: TYPE IUE::IUE$DKB0:[ANONYMOUS]readme.;1 To read the readme.txt file in the iuedac subdirectory, type: TYPE IUE::IUE$DKB0:[ANONYMOUS.IUEDAC]readme.txt To copy all the BACKUP files back to your home institution, type: COPY IUE::IUE$DKB0:[ANONYMOUS.IUEDAC]*.BCK * Users accessing the IUEDAC IDL software are requested to fill out a registration form. A copy is contained in the file register.txt in the iuedac subdirectory along with directions for e-mailing it back to the IUEDAC staff. rwt

  • The software system used to process IUE data for the Final Archive, known as NEWSIPS, is available for distribution. The distributed system contains the calibration files necessary to process SWP and LWP low dispersion data obtained before 1990. Calibration files for LWR data, 1990-1995 data, and high dispersion data are not yet available. Documentation describing the installation and use of the system is available in an anonymous FTP account on "". A request form also resides in the FTP account to be used to electronically request the software. For legal reasons, the source code for NEWSIPS cannot be placed in the FTP account, but is available upon request. NEWSIPS has been ported to several different platforms, including ULTRIX and OpenVMS. The code is written in standard FORTRAN 77 and coupled with MIDAS, an analysis and I/O package available free of charge. MIDAS is used to handle the I/O of the NEWSIPS system. System requirements are described in the documentation. Questions about the NEWSIPS system and requests for access to the software can be directed to Joy Nichols, (301) 794-1410, "". jn

  • Progress on the IUE Final Archive
  • The Image Processing Center is making great progress in processing archival IUE images with the NEWSIPS software. Thus far we have processed over 14,430 SWP and 1060 LWP low-dispersion images. We have essentially completed the first set of SWP data ("Set 1" = low dispersion images taken by NASA before 1990; image numbers < 37929). They may be obtained from the NSSDC NDADS system. There are some engineering and sky background images yet to process, plus a few "problem" images (e.g. bad raw data). We have also started processing LWP data ("Set 1" = low dispersion images taken by NASA before 1990; image numbers < 17058). We are now using both our DECstations, extra disk space, and an AXP Alpha computer for processing. This has roughly quadrupled our processing rate! If you need some particular LWP images (Set 1 only) right away, you may request to have them processed ASAP. See the previous IUEDAC e-newsletter or NASA IUE Newsletter No. 54 for details. Is the one image you absolutely need a VILSPA or recent image, which isn't available? We can process a few such images on special request. Any such processing is "unofficial" and the data will not be archived. For details, contact Cathy Imhoff at or (301) 794-1470. cli

  • IUE Atlases Available
  • We have two very useful IUE spectral atlases available on request. "IUE Ultraviolet Spectral Atlas" by C.-C. Wu et al. 1991, NASA IUE Newsletter, No. 43. Plots IUE spectra, tabulates fluxes for MK standard stars. "IUE Ultraviolet Spectral Atlas of Selected Astronomical Objects" by C.-C. Wu et al. 1992, NASA Ref. Publ. No. 1285 Plots IUE spectra, tabulates fluxes for planets, variable stars, galaxies, etc. If you would like a copy or two, please contact Cathy Imhoff at or (301) 794-1470. cli

  • 30-DEC New experimental routines: READMX - runs slightly faster than implemented version READSI - runs slightly faster & nu flag output array is optional BBDRAW - allows printouts of plots & replaces iueplot with nsplot NSPLOT - minor changes to simplify calling from other programs IUEPROG - searches database table of IUE program IDs GFILTER - applies a Gaussian filter to vectors or arrays
    Notice: In order to improve software portability, all IUEDAC programs currently using system logicals or environment variables will be modified to use IDL system variables instead. The database routines have already been modified. All changes should be transparent to users, but small changes in the IUEDAC software installation procedure will be required at remote sites. rwt

  • The IUE Merged Log (IUELOG) database has been updated and is now current for observations through the 31st of December 1994. There was an error in the roll angle field that has now been corrected. The IUEFES database is current for observations through the 23rd of May 1994. The sun_mergelog.tar.Z and ultrix_mergelog.tar.Z files are in the pub/software subdirectory of's anonymous ftp account. The updated documentation file, iuelog.txt is available in the pub/beta subdirectory. Please see the README files in each directory for further information. pjl

  • The sun_rdaf.tar.Z and ultrix_mipsel.tar.Z files in the anonymous ftp account on were updated on the 23rd of January 1995. pjl

    Editor: Dr. Michael Carini Contributors: Mr. Randy Thompson Dr. Tom Meylan Ms. Pat Lawton Ms. Lyla Taylor Dr. Cathy Imhoff Dr. Joy Nichols

    Web Curator:

    Dr. Michael Carini, Science Programs, Computer Sciences Corporation.

    Responsible NASA organization/official:

    Dr. Don West, IUE Operations Scientist.