HILIGT, Upper Limit Servers II - Implementing the data servers
Freyberg, M. J.; Wilms, J.; Savchenko, V.; Kretschmar, P.; Saxton, R. D.; Evans, P. A.; Angelini, L.; Traulsen, I.; Belanger, G.; König, O.
Germany, Spain, United States, United Kingdom, Switzerland
Abstract
The High-Energy Lightcurve Generator (HILIGT) is a new web-based tool which allows the user to generate long-term lightcurves of X-ray sources. It provides historical data and calculates upper limits from image data in real-time. HILIGT utilizes data from twelve satellites, both modern missions such as XMM-Newton and Swift, and earlier facilities such as ROSAT, EXOSAT, Einstein or Ariel V. Together, this enables the user to query 50 years of X-ray data and, for instance, study outburst behavior of transient sources. In this paper we focus on the individual back-end servers for each satellite, detailing the software layout, database design, catalog calls, and image footprints. We compile all relevant calibration information of these missions and provide an in-depth summary of the details of X-ray astronomical instrumentation and data.