J/MNRAS/423/1351 Energy distribution in pulsars (Burke-Spolaor+, 2012)
The High Time Resolution Universe Pulsar Survey.
V. Single-pulse energetics and modulation properties of 315 pulsars.
Burke-Spolaor S., Johnston S., Bailes M., Bates S.D., Bhat N.D.R.,
Burgay M., Champion D.J., D'Amico N., Keith M.J., Kramer M., Levin L.,
Milia S., Possenti A., Stappers B., van Straten W.
<Mon. Not. R. Astron. Soc., 423, 1351-1367 (2012)>
=2012MNRAS.423.1351B 2012MNRAS.423.1351B
ADC_Keywords: Pulsars
Keywords: astronomical databases: miscellaneous - pulsars general
Abstract:
We report on the pulse-to-pulse energy distributions and
phase-resolved modulation properties for catalogued pulsars in the
southern High Time Resolution Universe intermediate-latitude survey.
We selected the 315 pulsars detected in a single-pulse search of this
survey, allowing a large sample unbiased regarding any rotational
parameters of neutron stars.
Description:
The initial pulsar set included all pulsars in the med-lat survey
region as queried through the online ATNF Pulsar Database
(http://www.atnf.csiro.au/research/pulsar/psrcat/). We selected the
observation of smallest angular distance within 0.25° to each
pulsar, yielding 1159 observations near 1113 pulsars (some had
multiple observations at roughly equal distance to the pulsar). We
scrutinized the HTRU Fourier and single-pulse search results for each
observation (as described in Keith et al., 2010MNRAS.409..619K 2010MNRAS.409..619K and
Burke-Spolaor et al., 2011MNRAS.416.2465B 2011MNRAS.416.2465B, respectively) to determine
the pulsar's detectability.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 97 325 The numerical results of the energy distribution
and modulation analysis
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See also:
http://www.atnf.csiro.au/research/pulsar/psrcat/ : ATNF Home Page
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 11 A11 --- Name PSR name (J2000) JHHMM+DDMM
12 A1 --- n_Name [*] Saturated observations (Vela pulsar) (1)
13 A1 --- f_Name [im] interpulse or main (2)
14- 17 I4 --- Np ?=- Number of pulses detected in
blind single-pulse search
18 A1 --- --- [/]
19- 24 I6 --- Nrot ?=- Total number of rotations in the
observation
26- 32 F7.1 --- S/Ni ?=- Integrated (Fourier) S/N
34- 38 F5.1 --- S/Nb ?=- S/N of the brightest single pulse detected
in the blind single-pulse search
40- 44 F5.1 --- Average single-pulse energy significance
46- 49 F4.1 --- Rjmax ?=- Maximum Rj value, where significant (4)
51- 56 F6.4 --- mjmin ?=- Minimum on-pulse, phase-resolved
modulation index, where significant (4)
58 A1 --- Null? [Y/N] Whether pulse appears to be nulling (Y)
or had no zero-energy pulses (N) (5)
61 A1 --- D [LGUMO] Energy distribution classification (3)
62 A1 --- u_D [)] Uncertainty flag on DClass
64- 69 F6.4 --- Pl Probability associated with the
best-fitting log-normal energy distribution
71- 74 F4.2 --- sl Fit value σ associated with the
best-fitting log-normal energy distribution
76- 80 F5.2 --- ml Fit value µ associated with the
best-fitting log-normal energy distribution
82- 87 F6.4 --- Pg Probability associated with the
best-fitting Gaussian energy distribution
89- 92 F4.2 --- sg Fit value σ associated with the
best-fitting Gaussian energy distribution
94- 97 F4.2 --- mg Fit value µ associated with the
best-fitting Gaussian energy distribution
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Note (1): Note as follows:
* = Many single pulses from the Vela pulsar (PSR J0835-4510) saturated
the observing instrumentation. This disrupted the observed integrated and
single-pulse S/N, and the modulation parameters at phases near the pulse
peak. The modulation parameters are not reported here but Vela's modulation
profile can be viewed in the online figure (see Appendix A).
Note (2): We identified five interpulse pulsars in our sample; the main and
interpulses for these pulsars ('interpulse' here being the fainter
component) have separately reported statistics in the table, marked
by m and i, respectively, in addition to the statistics from the total
integrated emission window.
Note (3): Energy distribution classification as follows:
L = Log-normal: distribution unimodal, best-fitting Pl≥0.75 and Pg<0.75
G = Gaussian: distribution unimodal, best-fitting Pl<0.75 and Pg≥0.75
U = Unimodal: both Pl and Pg are ≥0.75
M = Multipeaked: two or more peaks were discernible at energy levels
above the noise
O = Other (pulsars with both Pl and Pg<0.75)
Note (4): R modulation statistic in the observation bins j:
Rj=(Mj-µj)/σj where Mj is the maximum in the bin,
µj the mean in the bin, and σj the rms. See Johnston
et al. (2001ApJ...549L.101J 2001ApJ...549L.101J).
Note (5): the "pulsar nulling" is a sudden cessation of pulsed emission.
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History:
From electronic version of the journal
References:
Keith et al., Paper I 2010MNRAS.409..619K 2010MNRAS.409..619K
Bates et al., Paper II 2011MNRAS.416.2455B 2011MNRAS.416.2455B
Burke-Spolaor et al., Paper III 2011MNRAS.416.2465B 2011MNRAS.416.2465B
Keith et al., Paper IV 2012MNRAS.419.1752K 2012MNRAS.419.1752K
Bates et al., Paper VI 2012MNRAS.427.1052B 2012MNRAS.427.1052B
(End) Patricia Vannier [CDS] 04-Apr-2013