Context :

PG1247+267 is one of the most luminous known quasars at z \sim 2 and is a strongly super-Eddington accreting SMBH candidate .
We obtained NuSTAR data of this intriguing source in December 2014 with the aim of studying its high-energy emission , leveraging the broad band covered by the new NuSTAR and the archival XMM–Newton data .
Several measurements are in agreement with the super-Eddington scenario for PG1247+267 : the soft power law ( \Gamma = 2.3 \pm 0.1 ) ; the weak ionized Fe emission line ; and a hint of the presence of outflowing ionized gas surrounding the SMBH .
The presence of an extreme reflection component is instead at odds with the high accretion rate proposed for this quasar .
This can be explained with three different scenarios ; all of them are in good agreement with the existing data , but imply very different conclusions : i ) a variable primary power law observed in a low state , superimposed on a reflection component echoing a past , higher flux state ; ii ) a power law continuum obscured by an ionized , Compton thick , partial covering absorber ; and iii ) a relativistic disk reflector in a lamp-post geometry , with low coronal height and high BH spin .
The first model is able to explain the high reflection component in terms of variability .
The second does not require any reflection to reproduce the hard emission , while a rather low high-energy cutoff of \sim 100 keV is detected for the first time in such a high redshift source .
The third model require a face-on geometry , which may affect the SMBH mass and Eddington ratio measurements .
Deeper X-ray broad-band data are required in order to distinguish between these possibilities .

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