Open Universe survey of Swift-XRT GRB fields: Flux-limited sample of HBL blazars

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Table 1.

Results of the cross-matching of the clean sample with catalogues of known objects.

Catalogue name	Type	No. of	Matching
		matches	radius (″)
Milliquas V6.4 ⁽¹⁾	QSOs	6038	10
5BZCAT ⁽²⁾, 3HSP ⁽³⁾
4LAC ⁽⁴⁾	Blazars	34	10
ASCC ⁽⁵⁾	Stars	676	10
Principal Galaxies
Catalog PGC ⁽⁶⁾	Galaxies	25	10
NVSS ⁽⁷⁾, SUMMS21 ⁽⁸⁾	Radio sources	889	10
Zwicky, Abell ⁽⁹⁾	Clusters
Plancksz, SWXCS ⁽¹⁰⁾	of galaxies	∼140	90

References. ⁽¹⁾Flesch (2015), ⁽²⁾Massaro et al. (2015), ⁽³⁾Chang et al. (2019), ⁽⁴⁾The Fermi-LAT collaboration (2020), ⁽⁵⁾Kharchenko & Roeser (2009), ⁽⁶⁾Paturel et al. (2003), ⁽⁷⁾Condon et al. (1998), ⁽⁸⁾Manch et al. (2003), ⁽⁹⁾Zwicky et al. (1968), Abell et al. (1989), ⁽¹⁰⁾Planck Collaboration XXVII (2016), Liu et al. (2015).

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