To get started using IRAF and STSDAS refer to the tutorial information in Appendix A of Volume I of this manual, or in the STSDAS Users Guide. An example of displaying HSP data is provided below.
40.3.1 Displaying the SHP and UDL
The header consists of engineering telemetry values, plus other information. The SHP and the UDL each contain two groups. This should be checked by looking at the keyword GCOUNT. The value for GCOUNT should be 2. The keyword PTSRCFLG (point source flag) should list either P for a point source or E for an extended source. The IRAF task listpixels under the images package can be used to look at the values of the SHP and UDL pixels. The following chart shows the correct value for SHP pixel #937 according to MODE and if the source is EXTENDED or POINT.| Mode | Source | SHP 937 Pixel Value |
|---|---|---|
|
SCP
|
P
|
1
|
|
SSP
|
P
|
2
|
|
SCP
|
E
|
257
|
|
SSP
|
E
|
258
|
|
ARS
|
-
|
3
|
40.3.2 Displaying HSP Area Scans
HSP area scans can be displayed by using the IRAF surface or contour tasks under the plot package.You can display area scans (which make little images) using the IRAF display task and SAOimage, described on page 3-4. The time series data can be displayed using either splot (page 3-25) or implot (page 3-10), which will make one-dimensional plots of counts versus time.
Figure 40.1: HSP Area Mode Display
Figure 40.2: HSP Time Series Data Plot
Copyright © 1997, Association of Universities for Research in Astronomy. All rights reserved.
Last updated: 01/14/98 15:59:58