The Anonymous Hera Interface
1 Setup ProcedureBefore using any of the Hera services, the small fv program must be installed on your local machine. You must have version 4.3 or higher to be able to access all the Hera services. Fv is a versatile FITS file viewer and editor utility, and it also serves as the local client for communicating with the Hera servers at the HEASARC. Follow the simple instructions on the fv download page to install the software.
To use the Anonymous Hera interface you also must configure your web browser to use fv as a helper application. The setup procedure depends slightly on your type of local computer, so choose from the following links:
2 Query the Browse DatabaseTo start an anonymous Hera data analysis session you must first select a data set from the HEASARC data archive using the Browse query interface. Any of various Browse interfaces may be used (e.g., either the Full or the Keyword Search interfaces). In this example, we use the Quick Search Form to query the ROSAT mission catalogs for observations of NGC 499:
3 Select a Data SetAfter clicking on the "Start Query" button, a new web page will appear that displays the observations of NGC 499 that were found in a half a dozen of the many ROSAT mission tables in the Browse data base. The first lines from the "ROSAT Archival Data" table are shown below:
Note the "Services" column which lists various web-based resources for getting more information about each data set. Of particular interest here is the 'X' service link, which starts an anonymous Hera session.
4 Start up a Hera Data Analysis SessionIf you click on the 'X' service in the second row of this table (Dataset ID = RP600254A01) then the following Hera data analysis window should appear appear after a few seconds:
All the data products associated with this ROSAT observation have been copied to a temporary anonymous Hera account, and are shown in the main upper right directory window. You may now examine or analyze these data using any of the tools in the software packages shown in the left hand window. To learn more about how to use the Hera GUI,see the description of the standard Hera interface and the Frequently Asked Questions pages.