XL-Calibur Master Catalog

This database table records high-level information for the observations obtained with the XL-Calibur experiment. The XL-Calibur is a balloon-borne second-generation (X-ray-focusing) Compton polarimeter operational in the energy range ~15-80 keV with the main objective to measure polarization in hard X-rays for a selection of bright sources. XL-Calibur was successfully launched from the Esrange Space Center (Kiruna, Sweden) on July 9th, 2024 and following circumpolar winds in the west direction, the payload landed with a parachute near Kugluktuk (Canada) on July 14th. During operation, the Crab system (pulsar and wind nebula) and Cygnus X-1 black (X-ray binary system) were successfully observed. The data from these two sources were divided in observations roughly one day long. An observation is defined as a collection of snap-shots where data are acquired on one specific on-source position alternate to an off-source position. The off source position data are used as background data. Each observation is labeled with a sequence number. The data associated includes event files for the on-source and off-source positions and three on-source spectra derived for the Stokes parameters I, Q, U, and an equivalent set for the off-source position. This database table contains one record for each sequence number and includes parameters related to the observation. The contents of this database table are generated at the HEASARC using information from the data files. The table was last updated in August 2025. This is a service provided by NASA HEASARC .

Identifier
Source https://dc.g-vo.org/rr/q/lp/custom/nasa.heasarc/xlcalmastr
Related Identifier https://heasarc.gsfc.nasa.gov/W3Browse/all/xlcalmastr.html
Related Identifier https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/w3query.pl?tablehead=name=heasarc_xlcalmastr&Action=More+Options&Action=Parameter+Search&ConeAdd=1
Metadata Access http://dc.g-vo.org/rr/q/pmh/pubreg.xml?verb=GetRecord&metadataPrefix=oai_b2find&identifier=ivo://nasa.heasarc/xlcalmastr
Provenance
Creator HEASARC
Publisher NASA/GSFC HEASARC
Publication Year 2025
OpenAccess true
Contact NASA/GSFC HEASARC help desk <heasarc-vo at athena.gsfc.nasa.gov>
Representation
Resource Type Dataset; AstroObjects
Discipline Astrophysics and Astronomy