IUE Project Electronic Newsletter
NASA-Goddard Space Flight Center (GSFC)
Vol. 5, No. 5 - May 1997
IUE Guest Observer Badges No Longer ValidPlease be advised that, effective May 1, 1997, badges issued to IUE Project participants for purposes of observation and analysis from 1978 through September 1996 will no longer be recognized for access to the Center. Access for individuals who visit the Center in the future for IUE data archiving proposes should be coordinated with the GSFC Security Office via memorandum.
Individuals who have been issued IUE badges may retain them as mementos of their long-standing association with the IUE Project and its many successes.
- Goddard Security Office
IUE Image Processing News
We are screening the LWR images to determine which ones are affected and will reprocess them with the corrected noise model. This change will be implemented in NEWSIPS Release 2.5.3, and the new noise model will be listed in the processing history as Version 1.1. For more information (e.g. whether your data are affected) please contact Cathy Imhoff (firstname.lastname@example.org, or 301-794-1470).
Matt has derived an update to the SWP sensitivity degradation correction, which has now been implemented into NEWSIPS processing. The update implements a linear correction with a larger slope for data from 1993 onward, defined to be continuous with the correction up to 1993 so that there is no "jump" in the fluxes for images taken before and after the new correction is applied. The details of this analysis will be published in the NASA IUE Newsletter and made available on the Web.
We have begun to reprocess all SWP low- and high-dispersion data from 1993 onward with the new sensitivity degradation correction. The new version of the data will be identifiable from the processing history NEWSIPS version (2.5.3 for SWP low dispersion, 3.1.1 for SWP high dispersion) as well as the processing date.
What about the LWP?Testing shows that there is no need to change the sensitivity degradation correction. The extrapolation for later data works fine.
Coming Attractions: LWP High-Dispersion ProcessingThe LWP high-dispersion processing system is nearly ready. We hope to start processing images in the next 2 to 3 weeks. You are welcome to send us your requests for priority processing; however they will not be put into the system until processing begins. You can access the request form at:
Questions?If you have any questions about IUE processing or the Final Archive, please feel free to contact me at email@example.com, or at 301-794-1470. Thanks!
IUEDAC Software Changes
Final Archive Data From Anonymous FTPThe IUE Final Archive low dispersion extracted spectra are being made available via anonymous ftp at Goddard's Astrophysics Data Facility. To access this copy of the MXLO files, ftp to hypatia.gsfc.nasa.gov with the user name of anonymous and the password as your e-mail address.
The data will be found in the
All these file are in FITS format. For assistance with working with the data, please contact the IUE Data Analysis Center's staff (firstname.lastname@example.org).
Please note, these directories are still being filled. Over 90% of the Goddard SWP and LWP low dispersion data have been processed. VILSPA is processing the data obtained there and we must await the transfer from them of that data. LWR low dispersion processing has recently started. The data will be available via the NASA Data Archive and Distribution Service (http://ndads.gsfc.nasa.gov) before they are available on this site.
There are currently 17,588 LWP files and 30,924 SWP files available. No high dispersion data will be available from this anonymous ftp site due to disk space limitations. To obtain high dispersion data and the other low dispersion data types, please use the NDADS.
- Pat Lawton, ADF/UV Support
Mail Code ChangeThe Goddard mail code for the IUEDAC recently changed to Code 686.9. While the old code of 684.9 may be recognized for a while longer, we suggest that users employ the new code for mail delivery.
The IUE Electronic Newsletter, edited by James Caplinger, is primarily intended to inform the numerous remote and local users of the IUEDAC software of recent software updates, as well as let them know about news relating to the IUE project in general. If you want your name to be added to, deleted from, or changed on our distribution list, please send us e-mail to
or send a postcard to:
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WebmasterMr. James R. Caplinger, Computer Sciences Corporation
Responsible NASA Organization/OfficialDr. Don West, IUE Operations Scientist