J/MNRAS/453/4485 Absolute polarimetry observations of 33 pulsars (Force+, 2015)
Absolute polarization determinations of 33 pulsars using the Green Bank
Telescope.
Force M.M., Demorest P., Rankin J.M.
<Mon. Not. R. Astron. Soc., 453, 4485-4500 (2015)>
=2015MNRAS.453.4485F 2015MNRAS.453.4485F (SIMBAD/NED BibCode)
ADC_Keywords: Pulsars ; Radio sources ; Stars, ages ; Proper motions ;
Polarization
Keywords: pulsars: general
Abstract:
Absolute polarimetry observations of 33 pulsars were carried out with
the Green Bank Telescope in the 1100-1900 MHz band using the Green
Bank Ultimate Pulsar Processing Instrument. This group was selected to
help complete a larger sample for which accurate proper-motion
measurements were available. A combination of profile analysis using
the core/double cone model and polarization-angle fitting methods were
applied to estimate the "fiducial" longitude of the magnetic axis for
each star and refer the linear polarization angle at that point to
infinite frequency. As had been found previously, a number of the
pulsars are found to have fiducial polarization directions that fall
either along or at right angles to their proper-motion directions,
whereas upwards of a third of the stars studied show alignments that
are neither parallel nor orthogonal.
Description:
The observations were carried out in the summer of 2011 using the
100-m Robert C. Byrd GBT and the Green Bank Ultimate Pulsar Processing
Instrument (GUPPI) in coherent filterbank mode. Full-Stokes spectra
were acquired in an 800 MHz bandwidth centred at 1500 MHz radio
frequency; the ∼1200-1300 MHz airport radar analogue filter was used,
resulting in a ∼700 MHz effective bandwidth. The filterbank frequency
resolution was 1.5 MHz, or 512 channels across the full band.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 86 37 Proper motions, rotation measures and absolute
polarization angles for the 33 pulsars and
calibrators
tablea2.dat 72 36 Emission-beam geometry of the sample pulsars as
in ET VIb, Table 2 (Rankin 1993ApJS...85..145R 1993ApJS...85..145R)
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See also:
VII/156 : Catalog of 558 Pulsars (Taylor+ 1993)
VII/189 : Catalog of Pulsars (Taylor+ 1995)
B/psr : ATNF Pulsar Catalogue (Manchester+, 2005)
J/MNRAS/301/235 : Multifrequency polarimetry of 300 pulsars (Gould+, 1998)
J/ApJS/121/171 : Arecibo polarimetry of 98 pulsars (Weisberg+, 1999)
J/MNRAS/362/1189 : Proper motions of 74 pulsars (Zou+, 2005)
J/ApJ/642/868 : Rotation measures for 223 pulsars (Han+, 2006)
J/MNRAS/386/1881 : New pulsar rotation measures (Noutsos+, 2008)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- PSRB PSR name (BHHMM+DD)
10- 19 A10 --- PSRJ PSR name (JHHMM+DDMM)
21- 25 F5.3 s Per Pulsar's rotation period
27- 30 F4.2 [yr] logAge Log of the Age
32- 35 I4 deg PAv ?=- Proper motion direction PAV
37- 38 I2 deg e_PAv ? Uncertainty in Pav
40 I1 --- r_PAv [1/9]? Reference for PAv (1)
42- 48 F7.2 rad/m2 RMp ? Previous rotation measure
50- 54 F5.2 rad/m2 e_RMp ? Uncertainty in RMp
56- 57 I2 --- r_RMp [1/10]? Reference for RMp (2)
59- 64 F6.1 rad/m2 RMm ? Measured rotation measure
66- 69 F4.2 rad/m2 e_RMm ? Uncertainty in RMm
71- 73 I3 deg PAo Fiducial polarization angle direction PA0
75- 76 I2 deg e_PAo Uncertainty in PAo
78- 79 A2 --- Fig Figure number associated in the paper
81- 83 I3 deg Psi ? Orientation angle Ψ
85- 86 I2 deg e_Psi ? Uncertainty in Psi
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Note (1): Reference as follows:
1 = Brisken et al. (2003AJ....126.3090B 2003AJ....126.3090B);
2 = Chatterjee et al. (2009ApJ...698..250C 2009ApJ...698..250C);
3 = Harrison, Lyne & Anderson (1993MNRAS.261..113H 1993MNRAS.261..113H);
4 = Brisken et al. (2002ApJ...571..906B 2002ApJ...571..906B);
5 = Zou et al. (2005, J/MNRAS/362/1189);
6 = Thorsett, Brisken & Goss (2002ApJ...573L.111T 2002ApJ...573L.111T);
7 = Chatterjee et al. (2004ApJ...604..339C 2004ApJ...604..339C);
8 = Hobbs et al. (2004, J/MNRAS/353/1311);
9 = Lyne, Anderson & Salter (1982MNRAS.201..503L 1982MNRAS.201..503L).
Note (2): Reference as follows:
1 = Hamilton & Lyne (1987MNRAS.224.1073H 1987MNRAS.224.1073H);
2 = Qiao et al. (1995MNRAS.274..572Q 1995MNRAS.274..572Q);
3 = Johnston et al. (2005MNRAS.364.1397J 2005MNRAS.364.1397J);
4 = Manchester (1974ApJ...188..637M 1974ApJ...188..637M);
5 = Taylor, Manchester & Lyne (1993, Cat. VII/156);
6 = Han, Manchester & Qiao (1999MNRAS.306..371H 1999MNRAS.306..371H);
7 = Manchester (1972ApJ...172...43M 1972ApJ...172...43M);
8 = Noutsos et al. (2008, J/MNRAS/386/1881);
9 = Han et al. (2006, J/ApJ/642/868);
10 = Rand & Lyne (1994MNRAS.268..497R 1994MNRAS.268..497R).
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Byte-by-byte Description of file: tablea2.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- PSRB PSR Name (BHHMM+DD)
11- 14 A4 --- Class Classification (1)
16- 19 F4.1 deg alpha ? Magnetic latitude α
20- 25 F6.1 --- PPA ?=- Polarization position-angle (PPA)
sweeprate, |Δ{Khi}/Δφ|o
[=R=sinα/sinβ]
26 A1 --- n_PPA [aI?] Note on PPA (2)
28- 31 F4.1 deg beta ? Sightline impact angle β
33- 36 F4.1 deg DeltaPhi1 ?=- Half-power conal component width for
the inner cones ΔΦ
37 A1 --- u_DeltaPhi1 [:?] Uncertainty flag on DeltaPhi1
39- 42 F4.1 deg rho1 ? Radius for the inner cones ρ
44- 48 F5.2 --- beta/rho1 ? β/ρ ratio for the inner cones
50- 53 F4.1 deg DeltaPhi2 ? Half-power conal component width for
the outer cones ΔΦ
54 A1 --- u_DeltaPhi2 [:] Uncertainty flag on DeltaPhi2
56- 58 F3.1 deg rho2 ? Radius for the outer cones ρ
60- 64 F5.2 --- beta/rho2 ? β/ρ ratio for the outer cones
66- 68 I3 km r1 ? Characteristic height for the inner cones
70- 72 I3 km r2 ? Characteristic height for the outer cones
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Note (1): The profile classifications in Rankin 1993ApJ...405..285R 1993ApJ...405..285R;
1993ApJS...85..145R 1993ApJS...85..145R. Classification as follows:
D = Conal double pulsar;
M = Five-component pulsar;
Sd = Conal single pulsar;
St = Core single pulsar;
T = Triple pulsar;
arT = May have a triple profile;
cQ = Conal quadruple pulsar;
cT = Conal triple pulsar.
Note (2): Note as follows:
a = Values from Lyne & Manchester (1988MNRAS.234..477L 1988MNRAS.234..477L);
I = Infinity;
? = uncertain.
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History:
From electronic version of the journal
(End) Tiphaine Pouvreau [CDS] 19-Dec-2017