2021ApJ...908..184B

Query : 2021ApJ...908..184B

2021ApJ...908..184B - Astrophys. J., 908, 184-184 (2021/February-3)

Timing calibration of the NuSTAR X-ray telescope.

BACHETTI M., MARKWARDT C.B., GREFENSTETTE B.W., GOTTHELF E.V., KUIPER L., BARRET D., COOK W.R., DAVIS A., FURST F., FORSTER K., HARRISON F.A., MADSEN K.K., MIYASAKA H., ROBERTS B., TOMSICK J.A. and WALTON D.J.

Abstract (from CDS):

The Nuclear Spectroscopic Telescope Array (NuSTAR) mission is the first focusing X-ray telescope in the hard X-ray (3-79 keV) band. Among the phenomena that can be studied in this energy band, some require high time resolution and stability: rotation-powered and accreting millisecond pulsars, fast variability from black holes and neutron stars, X-ray bursts, and more. Moreover, a good alignment of the timestamps of X-ray photons to UTC is key for multi-instrument studies of fast astrophysical processes. In this paper, we describe the timing calibration of the NuSTAR mission. In particular, we present a method to correct the temperature-dependent frequency response of the on-board temperature-compensated crystal oscillator. Together with measurements of the spacecraft clock offsets obtained during downlinks passes, this allows a precise characterization of the behavior of the oscillator. The calibrated NuSTAR event timestamps for a typical observation are shown to be accurate to a precision of ∼65 µs.

Abstract Copyright: © 2021. The American Astronomical Society. All rights reserved.

Journal keyword(s): Pulsar timing method - Cross-validation - X-ray detectors - X-ray astronomy - X-ray telescopes - Millisecond pulsars

Simbad objects: 10

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Number of rows : 10
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 PSR J0205+6449 Psr 02 05 37.92 +64 49 42.8           ~ 268 1
2 PSR J0218+42 Psr 02 18 06.3604 +42 32 17.365           ~ 365 2
3 V* CM Tau Psr 05 34 31.9474694616 +22 00 52.153698024           ~ 5476 0
4 XTE J1737-376 HX? 17 37 59.5 -37 46 20           ~ 58 1
5 SWIFT J1756.9-2508 LXB 17 56 57.35 -25 06 27.8           ~ 118 0
6 IGR J17591-2342 LXB 17 59 08.789 -23 42 46.70           ~ 53 0
7 SAX J1808.4-3658 LXB 18 08 27.58 -36 58 43.9           ~ 1051 0
8 PSR J1824-2452A Psr 18 24 32.009 -24 52 11.10           ~ 529 2
9 PSR B1937+21.4 Psr 19 39 38.560096 +21 34 59.13552           ~ 1142 0
10 PSR J2022+3842 Psr 20 22 21.689 +38 42 14.82           ~ 66 0

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