A millisecond pulsar position determined to 0.2 mas precision with VLBI

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Volume 691 (November 2024)

A&A, 691 (2024) A47

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Table A.1

Unresolved flux densities & angular separations from PSR J2222–0137.

source	purpose ^a	𝒮_18cm	𝒮_13cm	𝒮_4cm	𝒮_2cm	^Δpsr
name		(mJy beam⁻¹)	(mJy beam⁻¹ )	(mJy beam⁻¹ )	(mJy beam⁻¹)	(deg)
PSR J2222−0137	target	0.8	—	—	—	0
ICRF J221852.0−033536	phase cal. / CS det.	1.5 × 10³	1.0 × 10³	1.4 × 10³	1.8 × 10³	2.13
ICRF J221947.2−005132	phase cal. / CS det.	165.2	113.9	113.0	111.5	0.96
ICRF J222646.5+005211	phase cal. / CS det.	249.2	267.7	459.3	762.2	2.75
FIRST J222112−012806	phase cal. / CS det.	24.7	9.5	10.5	9.7	0.27
FIRST J222201−013236	phase cal.	14.5	—	—	—	0.08
ICRF J214805.4+065738	fringe finder	1.5 × 10³	1.1 × 10³	1.5 × 10³	2.2 × 10³	12.07

Notes. 𝒮_X refers to unresolved flux density at wavelength X obtained from the BD244 data alone. Δ_psr stands for angular separation from PSR J2222–0137.

^(a) “Phase cal.” and “CS det.” refers to phase calibrator and core-shift determination, respectively.

^(b) The unresolved flux densities acquired from the first L-band observation, where the frequency band includes both ~1.44GHz and ~1.76 GHz. The pulsar flux density is the average value over the spin period of PSR J2222–0137.

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