J/MNRAS/391/1210 Characteristics of energetic pulsars (Weltevrede+, 2008)
Profile and polarization characteristics of energetic pulsars.
Weltevrede P., Johnston S.
<Mon. Not. R. Astron. Soc. 391, 1210 (2008)>
=2008MNRAS.391.1210W 2008MNRAS.391.1210W
ADC_Keywords: Pulsars ; Polarization
Keywords: polarization - pulsars: general - pulsars: individual:
PSR J0905-5127, PSR J1126-6054, PSR J1611-5209, PSR J1637-4553 -
Abstract:
In this paper we compare the characteristics of pulsars with a high
spin-down energy loss rate (Edot) against those with a low Edot.
We show that the differences in the total intensity pulse morphology
between the two classes are in general rather subtle. A much more
significant difference is the fractional polarization which is very
high for high Edot pulsars and low for low Edot pulsars. The Edot at
the transition is very similar to the death line predicted for
curvature radiation. This suggests a possible link between high energy
and radio emission in pulsars and could imply that gamma-ray
efficiency is correlated with the degree of linear polarization in the
radio band. As part of this study, we have discovered three previous
unknown interpulse pulsars (and we detected one for the first time at
20cm). We also obtained rotation measures for 18 pulsars whose values
had not previously been measured.
Description:
The measured profile properties of the sample of pulsars. The first
column is the pulsar name (I indicates the interpulse), followed by
the observing wavelength, the total integration time, the
classification (Single, Double or Multiple), the signal to noise ratio
of the profile, whether the profile shows some evidence for scattering
(by eye), the profile width measured at the 50 per-cent intensity
point, the profile width measured at the 10 per-cent intensity point,
the number of significant fit functions to the profile for a S/N of
30, the symmetry coefficient, the percentage linear polarization, the
percentage circular polarization and the figure number.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
list.dat 36 352 Pulsar list
table.dat 76 527 The measured profile properties (Appendice C)
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See also:
VII/189 : Catalog of Pulsars (Taylor+ 1995)
J/A+AS/136/571 : Pulsars identified from the NRAO VLA Sky Survey (Han+ 1999)
http://www.atnf.csiro.au/research/pulsar/psrcat : PSRCAT Home Page
Byte-by-byte Description of file: list.dat
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Bytes Format Units Label Explanations
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1 A1 --- P [P] if pulse profile available (1)
2 A1 --- O [O] if observed in P574 proposal (2)
4- 13 A10 --- PSR Pulsar name (JHHMM+DDMM)
14 A1 --- n_PSR [*] Correction on PSR object (3)
17- 18 I2 h RAh Simbad Hour of Right Ascension (J2000.0)
20- 21 I2 min RAm Simbad Minute of Right Ascension (J2000.0)
23- 26 F4.1 s RAs ? Simbad Second of Right Ascension (J2000.0)
28 A1 --- DE- Simbad Sign of the Declination (J2000.0)
29- 30 I2 deg DEd Simbad Degree of Declination (J2000.0)
32- 33 I2 arcmin DEm Simbad Arcminute of Declination (J2000.0)
35- 36 I2 arcsec DEs ? Simbad Arcsecond of Declination (J2000.0)
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Note (1): plot of pulse profiles for all pulsars but 2 at
http://www.atnf.csiro.au/people/joh414/ppdata/index.html
Note (2): Observations made for the Fermi (GLAST) mission at
http://www.atnf.csiro.au/people/wel161/glast/database/pulsarlist.html
Note (3): the flag * indicates the stars corrected in March 2010
(see the "History" section below):
PSR J1702-4306 = initially called PSR J1702-4305.
PSR J1055-6028 = initially called PSR J1055-6032.
PSR J0821-3824 = is not yet published in ATNF database:
accurate positions not available.
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Byte-by-byte Description of file: table.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- PSR Pulsar name (JHHMM+DDMM)
11 A1 --- n_PSR [I] I indicates the interpulse
13- 14 I2 cm lambda Observing wavelength
16- 21 I6 s Tobs The total integration time
23 A1 --- Mult [SDM] Classification (Single, Double or Multiple)
25- 29 I5 --- S/N The signal to noise ratio
31 A1 --- Scat [Y/N] If there is evidence for scattering (by eye)
33- 37 F5.1 deg W50 Profile width at 50 per-cent intensity point
39- 43 F5.1 deg W10 Profile width at 10 per-cent intensity point
46 I1 --- Ncomp ? Number of significant fit functions for
a S/N of 30
48- 52 F5.3 --- Sym Symmetry coefficient
54- 58 F5.1 --- Lpol ? Percentage linear polarization
60- 64 F5.1 --- e_Lpol ? Uncertainty in Lpol
66- 70 F5.1 --- Vpol ? Percentage linear polarization
72- 76 F5.1 --- e_Vpol ? Uncertainty in Vpol
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History:
* 29-Apr-2009: Original version
* 22-Mar-2010: PSR name corrections from author (See note 3 of list.dat)
Acknowledgements:
Patrick Weltevrede <patrick.weltevrede(at)manchester.ac.uk>
(End) Patricia Vannier [CDS] 12-Sep-2008