NICER observation list: Target ID 255201

Abstract

We propose a NICER observing sequence to determine a timing solution for the isolated neutron star RX J0806.4-4123. The previous XMM-Newton observations yielded a frequency derivative with a large uncertainty that is consistent with spin-up of the neutron star. A better constrained timing solution is needed because recent near-infrared observations discovered an extended source at the position of the neutron star which could indicate a circumpulsar disk. The proposed observations will allow us to test whether RX J0806.4-4123 has timing properties different from those of its siblings, the other six of the so-called Magnificent Seven.
Obsid RA DEC l b Start End Exposure Number of
Modules
Number of
Processing
Status of
Processing
Date of
Processing
Public
date
2552010101 121.598 -41.376 257.427 -4.983 58553.4961 58553.9650 8383.0 52 2 VALIDATED 58558.8 58747
2552010102 121.599 -41.376 257.427 -4.983 58554.0113 58554.9951 15684.0 52 2 VALIDATED 58560.7 58748
2552010103 121.598 -41.376 257.427 -4.983 58555.0422 58555.9609 13382.0 52 2 VALIDATED 58560.8 58749
2552010104 121.598 -41.376 257.427 -4.983 58556.0118 58556.7181 9222.8 52 1 VALIDATED 58560.8 58750
2552010201 121.597 -41.375 257.426 -4.983 58556.8324 58556.9910 4256.0 52 1 VALIDATED 58560.9 58750
2552010202 121.597 -41.375 257.426 -4.983 58557.0249 58557.4414 14875.0 52 2 VALIDATED 58561.7 58751
2552010301 121.597 -41.375 257.426 -4.983 58568.0988 58568.9560 0.0 52 3 VALIDATED 58573.8 58762
2552010302 121.597 -41.376 257.426 -4.984 58569.0035 58569.7879 0.0 52 2 VALIDATED 58573.8 58763
2552010401 121.596 -41.375 257.425 -4.984 58631.0482 58631.8509 19535.0 52 3 VALIDATED 58635.6 58825