Open Access

Table 1

Queried catalogues for the counterpart search.

Catalogue Reference Radius
HEAO 1 Wood et al. (1984) 20′
Uhuru 4 Forman et al. (1978) 20′
Ariel V 3 Warwick et al. (1981) 20′
INTEGRAL Bird et al. (2016) 20′
Fermi Abdollahi et al. (2022) 20′
BeppoSAX Capitanio et al. (2011) 6′
Einstein 2E Harris et al. (1990) 4′
ROSAT White et al. (2000) 35″
Swift 2SXPS Evans et al. (2020) 8″
4XMM DR11 Webb et al. (2020) 4″
Chandra CSC 2 Evans et al. (2019) 3″
2MASS Cutri et al. (2003) 120mas
Gaia DR3 Gaia Collaboration (2022) 20 mas

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.