The Proper Motion of the Central Compact Object RX J0822-4300 in the Supernova Remnant Puppis A, Revisited. (arXiv:2005.09457v1 [astro-ph.HE])
<a href="http://arxiv.org/find/astro-ph/1/au:+Mayer_M/0/1/0/all/0/1">Martin Mayer</a> (MPE), <a href="http://arxiv.org/find/astro-ph/1/au:+Becker_W/0/1/0/all/0/1">Werner Becker</a> (MPE and MPIfR), <a href="http://arxiv.org/find/astro-ph/1/au:+Patnaude_D/0/1/0/all/0/1">Daniel Patnaude</a> (SAO), <a href="http://arxiv.org/find/astro-ph/1/au:+Winkler_P/0/1/0/all/0/1">P. Frank Winkler</a> (Middlebury College), <a href="http://arxiv.org/find/astro-ph/1/au:+Kraft_R/0/1/0/all/0/1">Ralph Kraft</a> (SAO)
We present an improved proper motion measurement of the central compact
object RX J0822-4300, located in the supernova remnant Puppis A. By employing a
new data set taken in February 2019 by the High Resolution Camera aboard the
Chandra X-ray Observatory, we approximately double the available temporal
baseline for our analysis to slightly more than 19 years (7000 days). We
correct for the astrometric inaccuracy of Chandra using calibrator stars with
known optical positions that are detected in all observations. Thereby, we
obtain absolute positions of RX J0822-4300 accurate to around 0.1” and from
these a new best estimate for its total proper motion of $mu_{rm tot}= (80.4
pm 7.7),rm{mas,yr}^{-1}$. For a remnant distance of 2 kpc, this corresponds
to a projected kick velocity of $(763 pm 73), rm{km,s}^{-1}$ at a position
angle of $phi_0 = (247.8 pm 4.4)^{circ}$. The proper motion measurement of
RX J0822-4300 is used for discussing the kinematic age of Puppis A.
We present an improved proper motion measurement of the central compact
object RX J0822-4300, located in the supernova remnant Puppis A. By employing a
new data set taken in February 2019 by the High Resolution Camera aboard the
Chandra X-ray Observatory, we approximately double the available temporal
baseline for our analysis to slightly more than 19 years (7000 days). We
correct for the astrometric inaccuracy of Chandra using calibrator stars with
known optical positions that are detected in all observations. Thereby, we
obtain absolute positions of RX J0822-4300 accurate to around 0.1” and from
these a new best estimate for its total proper motion of $mu_{rm tot}= (80.4
pm 7.7),rm{mas,yr}^{-1}$. For a remnant distance of 2 kpc, this corresponds
to a projected kick velocity of $(763 pm 73), rm{km,s}^{-1}$ at a position
angle of $phi_0 = (247.8 pm 4.4)^{circ}$. The proper motion measurement of
RX J0822-4300 is used for discussing the kinematic age of Puppis A.
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