Crust cooling of accretion-heated neutron stars

We propose to continue our program to use the crust cooling behavior intransiently accreting neutron stars. Those crusts are heated due to the matteraccretion onto the neutron stars during outbursts. After the outbursts are overthe crusts cool down until they are in equilibrium with the cores again.Following this cooling processes for several systems has given us new insightsin the structure of neutron stars, but many uncertainties remain. Therefore itis needed to enlarge our sample of wellstudied sources to obtain betterinsights in the behavior of how neutron stars react to the accretion of matter.XMMN plays a crucial role in the earlier phase (<1 yr) of the crust coolingdecay and probing the behavior of shallow depths in the crusts. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]