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Fig. A.1

image

Soft X-ray images (0.3–10 keV) of the fields of 2PBC hard X-ray sources selected in this paper for optical spectroscopic follow-up. The object name is indicated in each panel. The BAT error circle is shown in blue and the new soft X-ray counterpart identifications for which the optical spectra were acquired are indicated with black arrows. In all cases, the objects selected as soft X-ray counterparts are the only ones with emission above 3 keV or with emission at 3σ considering the entire band of 0.310 keV. Field sizes are 20× 20. Nearly all images were extracted from the ASDC XRT database. In all cases, north is up and east to the left.

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