The final IUE conference, entitled Ultraviolet Astrophysics Beyond
Final Archive, will be held in Sevilla, Spain, on 11-14 November 1997.
This conference will address those astrophysical problems which have been
solved (and raised) as a consequence of 18.5 yrs of IUE observations. It
will also highlight the enormous expansion in the understanding of a wide
range of phenomena, from planetary magnetospheres to the environment near
massive black holes in AGNs. In addition, the conference will review the
current and future space instruments covering the ultraviolet domain.
The calendar of events include:
Early Registration Deadline: 1 September 1997
Registration Deadline: 19 September 1997
Receipt of Abstract Deadline: 1 October 1997
Conference: 11-14 November 1997
We are performing the final tests of the updates to the NEWSIPS processing
system so that we can process LWR high-dispersion images. Production
processing is expected to begin by mid-August. You are welcome to send us
your priority processing requests. Please use our web-based request
Version 2 of the manual is nearing completion. This version adds
information on high-dispersion and LWR low-dispersion NEWSIPS processing to
what was available in Version 1. Thus Version 2 will supercede Version 1.
We plan to publish the manual as a NASA IUE Newsletter and
make it available via the Web.
Status of NEWSIPS Processing
We are on track to finish the NEWSIPS processing of all NASA images by the
end of September. Here is how each data set stands as of August 7, 1997.
SWP low dispersion: 96% processed and archived.
LWP low dispersion: 96%
LWR low dispersion: 83%
SWP high dispersion: 96%
LWP high dispersion: 92%
LWR high dispersion: 0%
For the datasets with 96% completion, the remaining images include various
types of problem images and engineering images.
We note that the SWR images, as well as the FES images, are not being
reprocessed as NEWSIPS data. The original IUESIPS versions of these data
will continue to be available, if anyone wishes to use them.
If you have any questions about IUE processing or the Final Archive,
please feel free to contact me any time at email@example.com or
at 301-286-1470. Thanks!
new routine to convert MXLO wavelengths and fluxes to ASCII table files.
includes NEWSIPS LWP ripple correction parameters.
new routine to derive and display ripple correction for NEWSIPS high
dispersion spectral orders.
uses non-heliocentric velocity corrected wavelengths for deriving
splice points for NEWSIPS high dispersion spectral orders.
A new version of label was implemented which properly
displays label appendage information stored in NEWSIPS files.
The following routines were implemented:
includes the /noisecal keyword option for calibrating
high dispersion noise vectors.
allows the use of different symbols for displaying error bars.
The latest changes to the program readmx probably deserve
As many of you are aware, the noise vector included in the high dispersion
MXHI file is uncalibrated, and as such, can not be used to estimate the
error in absolute fluxes (unlike the sigma vector, which can be used for
low dispersion absolute fluxes). The noise vector is based on empirical
noise models (derived from evaluating the scatter in regions of
photometrically-corrected flat field images) and was originally intended
solely for flagging "bad pixels". It was never evaluated as an
estimator. The value associated with a given wavelength and stored in the
MXHI file is simply the sum of the estimated noise for each pixel in the
After several requests for a high dispersion error estimator,
readmx was modified to offer the user the option of
calibrating the noise vector. Basically, when the /noisecal
keyword is specified, readmx multiplies the noise vector by
the ratio of the absolute flux to the net flux. This results in both the
noise vector and the absolute flux vector having units of
ergs/cm**2/Å/sec. The program errbar can then be used
to superimpose error bars on a plot of absolute flux versus wavelength.
However, users should still use caution in trusting the accuracy of the
calibrated noise vector and should treat it as no more than a rough error
We still have some copies of various IUE Newsletters, manuals,
available. This is your last chance to get copies of your very own!
Please contact me at firstname.lastname@example.org or
301-794-1470 if you would like copies of any of these documents.
Various NASA IUE Newsletters (not all volumes available)
IUE Observing Guide - Vol. 47
IUE Spectral Atlas II - Vol. 43
NEWSIPS Information Manual (Version 1; see below) - Vol. 53
IUESIPS Information Processing Manual (Version 2)
NEWSIPS Information Processing Manual
Version 2 soon to be available - will be published as a NASA IUE
Version 1 (LWP and SWP low-dispersion only) still available but will be
superceded by Version 2
NASA Reference Publ. 1285: IUE Spectral Atlas of Selected
Astronomical Objects, by C.-C. Wu et al., 1992
NASA Reference Publ. 1312: Spectral Classification with the IUE:
An Atlas of B-Type Spectra, by J. Rountree and G. Sonneborn, 1993
NASA Reference Publ. 1363: IUE Atlas of B-Type Spectra from 1200
to 1900 Å, by N. Walborn, J. Parker, and J. Nichols, 1995
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