Instructions for using the sourcelist
General Information
These instructions describe how to use the web-based source list gixlist.pl.
Meaning of Different Columns
- Comments: A comment about the source
- Source: The name of the source
- Alias: Some sources have different names in different catalogues. See
the list of aliases.
- Ra: Rectascension
- Decl: Declination
- Prio: The priority class of the source. See the description of different
priorities.
- Due?: If there is a black star in this column, the source should be
observed soon. If there is a red star, then the source should be observed
right away.
- std ... other: Source categories. See the description of different
source categories.
- Reduced observation: The date of the latest reduced observation in
format WW/YY, where WW is the week number and YY the year.
- Latest observation: The date of the latest good quality observation,
edited by observers during their observing shifts, in format "WW/YY initials
comment". WW is the weeknumber, YY the year, initials are the initials of
the observer and the comment can be, for example, nd (no detection) or det
(detection).
- Add red star: By checking a source and pressing the update button, a red star
appears in the Due? column. This can be used if a source is behaving
strangely enough.
What to do after a good quality observation
- Click on the link "Latest observation".
- Edit the fields that correspond with the sources, from with you have good quality
data, like instructed earlier (Latest observation column).
- To save the changes, press update button. To return to the source list without
saving the changes, click on the "Back to main list" link.
Flux curve plots
Click on the source name to see the flux curve plot. The data points are
collected from koosteet and the GIX project database. The default frequency is
37 GHz. The date of the first and the latest observation (in decimal years)
and also the minimum and the maximum flux at the selected frequency can be seen
below the text "GIXplot: source @ frequency".
A different frequency can be selected. A new y-axis max. value will adjust
the maximum flux density value shown on the y-axis correspondingly. Data
points in the desired interval can be inspected by altering the start and
the end epoch value. Changes are applied when plot button is pressed. The
default values are restored by pressing the defaults button.
Possible problems
An error situation may occur when several people are updating the list at
the same time. The most probable outcome is that an error message is displayed and
the changes of only one person are saved. The others have to do the editing again.
Updated 071602 / mko