IUE Dynamic Spectrum Browser

******************* DISCLAIMER *********************

This browser and its accompanying data files are provided for your convenience, and are not original data products of the IUE project. They were developed as part of an AISRP program during 2001, and MAST is not responsible for errors which may have occurred during the transcription of the original data to reduced form. For detailed work, it is recommended that the original data products be used.

These browser files are for NEWSIPS data only.

How the Series Were Identified

First, we searched a data base of all the homogeneous object IDs of all IUE observations which weren't moving targets (solar system objects) or wave cals, flats or IGM pointings. The resulting sets were saved for each camera/dispersion combination. Next, duplicate EIDs (as occurs for multiple settings in the aperture or pointings in which both large and small aperture data were obtained) were culled from the list. If the culled set contained resulted in more than 10 observations, then the total number of observations were counted in the list of objects containing 10 or more spectra in a set. The results are a reasonable estimate of how many time series exit. The results are listed in the following table.
      Time Series Statistics       
Camera  Disp   Sets  Num    Mean obs
                     Obs    per set 
SWP     low    462   16955  36.3    
SWP     high   316   12515  39.6    
LW      low    352   12640  35.9    
LW      high   251    8106  32.3    
Thus, there are 1381 potential time series containing 50,216 spectra. This implies that ROUGHLY HALF of the IUE observations are members of time series!

The Main Browser Page

Each browser page displays a normalized dynamic spectrum. This is a set of spectra which have been ordered in time and normalized by a mean spectrum. A few remarks are needed to clarify how this was determined Currently have analyzed ONLY large aperture low resolution data.

Send comments to: Derck Massa