2016A&A...591A.123I

Query : 2016A&A...591A.123I

2016A&A...591A.123I - Astronomy and Astrophysics, volume 591A123-123 (2016/7-1)

Distance and luminosity probability distributions derived from parallax and flux with their measurement errors. With application to the millisecond pulsar PSR J0218+4232.

IGOSHEV A., VERBUNT F. and CATOR E.

Abstract (from CDS):

We use a Bayesian approach to derive the distance probability distribution for one object from its parallax with measurement uncertainty for two spatial distribution priors, a homogeneous spherical distribution and a galactocentric distribution - applicable for radio pulsars - observed from Earth. We investigate the dependence on measurement uncertainty, and show that a parallax measurement can underestimate or overestimate the actual distance, depending on the spatial distribution prior. We derive the probability distributions for distance and luminosity combined - and for each separately when a flux with measurement error for the object is also available - and demonstrate the necessity of and dependence on the luminosity function prior. We apply this to estimate the distance and the radio and gamma-ray luminosities of PSR J0218+4232. The use of realistic priors improves the quality of the estimates for distance and luminosity compared to those based on measurement only. Use of the wrong prior, for example a homogeneous spatial distribution without upper bound, may lead to very incorrect results.

Abstract Copyright: © ESO, 2016

Journal keyword(s): methods: statistical - stars: luminosity function, mass function - pulsars: general - pulsars: individual: PSR J0218+4232

Simbad objects: 1

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Number of rows : 1

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 J0218+42	Psr	02 18 06.3604	+42 32 17.365						~	365	2

Query : 2016A&A...591A.123I

Basic data :

PSR J0218+42 -- Pulsar
Other object types:	`gam (2024ApJS,3EG,...)`, `Psr (2010ApJS,PSR)`
ICRS coord. (ep=J2000) :	`02 18 06.3604 +42 32 17.365 (Radio) [ 15 11 0 ] B 2015ApJ...814..128K`
FK4 coord. (ep=B1950 eq=1950) :	`02 14 58.3259 +42 18 27.889 [ 15 11 0 ]`
Gal coord. (ep=J2000) :	`139.5080912 -17.5268286 [ 15 11 0 ]`
Proper motions mas/yr :	`5.39 1.4 [11 2 90] C` `2024ApJ...966...26T`

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`PSR J0218+42`	`2FGL J0218.1+4233`	`3FHL J0218.3+4230`	`PSR J0218+4232`
`3EG J0222+4232`	`3FGL J0218.1+4233`	`FL8Y J0218.1+4232`
`1FGL J0218.1+4232`	`4FGL J0218.1+4232`	`1LHAASO J0216+4237u`

References (365 between 1850 and 2026) (Total 365)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).

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External archives :

Archive data at HEASARC - High-Energy Astrophysics Science Archive Research Center

Data at NED - NASA/IPAC Extragalactic Database : PSR J0218+42

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3EG J0222+4232

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