Resolving Complex Inner X-ray Structure of the Gravitationaly Lensed AGN MGB2016+112. (arXiv:2103.08537v1 [astro-ph.HE])
<a href="http://arxiv.org/find/astro-ph/1/au:+Schwartz_D/0/1/0/all/0/1">Daniel Schwartz</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Spingola_C/0/1/0/all/0/1">Cristiana Spingola</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Barnacka_A/0/1/0/all/0/1">Anna Barnacka</a>
We use a Chandra X-ray observation of the gravitationally lensed system
MGB2016+112 at z=3.273 to elucidate presence of at least two X-ray sources. We
find that these sources are consistent with the VLBI components measured by
citet{Spingola19}, which are separated by $sim 200$ pc. Their intrinsic 0.5
— 7 keV source frame luminosities are 2.6$times$10$^{43}$ and
4.2$times$10$^{44}$ erg s$^{-1}$. Most likely this system contains a dual
active galactic nucleus (AGN), but we possibly are detecting an AGN plus a
pc-scale X-ray jet, the latter lying in a region at very high magnification.
The quadruply lensed X-ray source is within $pm$40 pc (1$sigma$) of its VLBI
counterpart. Using a gravitational lens as a telescope, and a novel statistical
application, we have achieved unprecedented accuracy for measuring metric
distances at such large redshifts in X-ray astronomy, which is tens of mas if
the source is located close to the caustics, while it is of hundreds of mas if
the source is in a region at lower amplification. The present demonstration of
this approach has implications for future X-ray investigations of large numbers
of lensed systems.
We use a Chandra X-ray observation of the gravitationally lensed system
MGB2016+112 at z=3.273 to elucidate presence of at least two X-ray sources. We
find that these sources are consistent with the VLBI components measured by
citet{Spingola19}, which are separated by $sim 200$ pc. Their intrinsic 0.5
— 7 keV source frame luminosities are 2.6$times$10$^{43}$ and
4.2$times$10$^{44}$ erg s$^{-1}$. Most likely this system contains a dual
active galactic nucleus (AGN), but we possibly are detecting an AGN plus a
pc-scale X-ray jet, the latter lying in a region at very high magnification.
The quadruply lensed X-ray source is within $pm$40 pc (1$sigma$) of its VLBI
counterpart. Using a gravitational lens as a telescope, and a novel statistical
application, we have achieved unprecedented accuracy for measuring metric
distances at such large redshifts in X-ray astronomy, which is tens of mas if
the source is located close to the caustics, while it is of hundreds of mas if
the source is in a region at lower amplification. The present demonstration of
this approach has implications for future X-ray investigations of large numbers
of lensed systems.
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