J/ApJ/892/76 The GBNCC pulsar survey. V. Pulsar census (McEwen+, 2020)
The Green Bank North Celestial Cap pulsar survey.
V. Pulsar census and survey sensitivity.
McEwen A.E., Spiewak R., Swiggum J.K., Kaplan D.L., Fiore W., Agazie G.Y.,
Blumer H., Chawla P., DeCesar M., Kaspi V.M., Kondratiev V.I., Larose M.,
Levin L., Lynch R.S., McLaughlin M., Mingyar M., Al Noori H., Ransom S.M.,
Roberts M.S.E., Schmiedekamp A., Schmiedekamp C., Siemens X., Stairs I.,
Stovall K., Surnis M., van Leeuwen J.
<Astrophys. J., 892, 76-76 (2020)>
=2020ApJ...892...76M 2020ApJ...892...76M (SIMBAD/NED BibCode)
ADC_Keywords: Pulsars; Surveys; Radio lines
Keywords: Radio pulsars; Radio astronomy; Surveys
Abstract:
The Green Bank North Celestial Cap (GBNCC) pulsar survey will cover
the entire northern sky (δ>-40°) at 350MHz, and is one of
the most uniform and sensitive all-sky pulsar surveys to date. We have
created a pipeline to reanalyze GBNCC survey data to take a 350MHz
census of all pulsars detected by the survey, regardless of their
discovery survey. Of the 1413 pulsars in the survey region, we were
able to recover 670. For these we present measured signal-to-noise
ratios (S/N), flux densities, pulse widths, profiles, and where
appropriate, refined measurements of dispersion measures (DMs) (656
out of 670) and new or improved spectral indices (339 out of 670
total, 47 new, 292 improved). We also measure the period-pulse width
relation at 350MHz to scale as W∝P-0.27. Detection scans for
several hundred sources were reanalyzed in order to inspect pulsars'
single pulse behavior and 223 were found to exhibit evidence of
nulling. With a detailed analysis of measured and expected S/N values
and the evolving radio frequency interference environment at 350MHz,
we assess the GBNCC survey's sensitivity as a function of spin period,
DM, and sky position. We find the sky-averaged limiting flux density
of the survey to be 0.74mJy. Combining this analysis with PsrPopPy
pulsar population simulations, we predict 60/5 nonrecycled/MSP
discoveries in the survey's remaining 21000 pointings, and we begin to
place constraints on population model parameters.
Description:
The Green Bank North Celestial Cap (GBNCC) data set as of late fall
2018 included ∼108000 120s pointings, each tagged with a unique beam
number. Each dual-polarization observation was taken with the 100m
Robert C. Byrd Green Bank Telescope (GBT) over the past ∼10yr. The
survey utilizes the Green Bank Ultimate Pulsar Processing Instrument
(GUPPI) backend, with a sampling time of 82{micro}s and 100MHz of
bandwidth centered at 350MHz (Paper I, Stovall+ 2014ApJ...791...67S 2014ApJ...791...67S).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tablea1.dat 196 670 Pulsar detections in the Green Bank North
Celestial Cap (GBNCC) survey
tablea2.dat 49 64 Pulsars with ≥3σ dispersion measure (DM)
changes
refs.dat 122 78 References
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See also:
B/psr : ATNF Pulsar Catalogue (Manchester+, 2005)
VII/156 : Catalog of 558 Pulsars (Taylor+ 1993)
VII/189 : Catalog of Pulsars (Taylor+ 1995)
J/MNRAS/273/411 : Multifrequency fluxes of 280 pulsars (Lorimer+ 1995)
J/MNRAS/301/235 : Multifrequency polarimetry of 300 pulsars (Gould+, 1998)
J/MNRAS/352/1439 : Parkes Multi-Beam Pulsar Survey. IV. (Hobbs+, 2004)
J/MNRAS/372/777 : Parkes Multibeam Pulsar Survey. VI. (Lorimer+, 2006)
J/ApJ/763/80 : GBT 350MHz survey. I. 13 new pulsars (Boyles+, 2013)
J/ApJ/812/81 : Arecibo Pulsar-ALFA (PALFA) survey. IV. (Lazarus+, 2015)
J/A+A/591/A134 : LOFAR census of non-recycled pulsars (Bilous+, 2016)
J/ApJ/829/119 : Known pulsars identified in the TGSS ADR (Frail+, 2016)
J/MNRAS/473/4436 : Spectral properties of 441 radio pulsars (Jankowski+, 2018)
J/MNRAS/474/4629 : Polarimetry of pulsars from 1.4GHz obs. (Johnston+, 2018)
J/MNRAS/484/3691 : UTMOST pulsar timing programme. I. (Jankowski+, 2019)
J/A+A/626/A104 : LOTAAS pulsar discoveries (Sanidas+, 2019)
Byte-by-byte Description of file: tablea1.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 3 A3 --- --- [PSR]
5- 15 A11 --- PSR Pulsar name (JHHMM+DDMMA, JHHMM+DDMMm,
JHHMM+DD or JHHMM+DDd)
17- 18 A2 --- f_PSR Pulsar flag(s) (1)
20- 30 A11 --- BName B1950 epoch name if any (BHHMM+DD)
32- 41 F10.6 pc/cm3 DM [3.2/423] Dispersion measure
43- 54 F12.9 pc/cm3 e_DM [0.001/32] Uncertainty in DM
56- 57 A2 --- f_DM [dd ] Flag on DM (2)
59- 63 I5 d MJD [55082/58386] Modified Julian Date of
brightest detection (JD-2400000.5)
65- 75 F11.9 deg Sep [0/0.95] Angular offset from center
of circular beam
77- 83 F7.3 ms w50 [0.1/243.1] On-pulse width at 50% max amplitude
85- 91 F7.3 ms w10 [0/913.5] On-pulse width at 10% max amplitude
93-106 F14.9 --- SNR [3.8/1050] Measured signal-to-noise ratio
108-119 F12.9 --- e_SNR [0.2/48] Uncertainty in SNR
121-134 F14.9 mJy S350MHz [0.25/1014] Flux density at 350MHz,
measured from GBNCC
136-148 F13.9 mJy e_S350MHz [0.06/501] Uncertainty on S350MHz
150-150 A1 --- f_alpha [d] Flag on alpha (3)
152-163 F12.9 --- alpha [-5.45/3.57]? Power-law spectral index
165-176 F12.9 --- e_alpha [0.001/48]? Uncertainty in alpha
178-196 A19 --- r_alpha Reference(s) (see refs.dat file)
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Note (1): Pulsar flags as follows:
* = Asterisks indicate pulsars with confirmed nulling or
mode-changing during the observations (220 pulsars);
A = AODrift (Deneva+ 2013ApJ...775...51D 2013ApJ...775...51D) discovery survey (7 pulsars);
B = GBNCC (Paper I, Stovall+ 2014ApJ...791...67S 2014ApJ...791...67S) discovery survey
(72 pulsars);
G = GBT350 discovery (Boyles+ 2013, J/ApJ/763/80) survey (3 pulsars);
HL = HTRU-hi lat (Keith+ 2010MNRAS.409..619K 2010MNRAS.409..619K) discovery survey (1 pulsar);
L = LOTAAS (Sanidas+ 2019, J/A+A/626/A104) discovery survey (10 pulsars);
ML = HTRU-mid and -lo lat (Keith+ 2010MNRAS.409..619K 2010MNRAS.409..619K) discovery survey
(3 pulsars);
S = SUrvey for Pulsars and Extragalactic Radio Bursts (SUPERB;
Keane+ 2018MNRAS.473..116K 2018MNRAS.473..116K & R. Spiewak et al. 2019, in prep.;
2 pulsars)
U = PSR J2315+58 was found in a GBNCC beam that was >3σ from the
pulsar's published position, resulting in unbelievable flux
density measurements. This is likely due to an error in the
published position. So, we measure flux in the beam in which it
was detected, and assume that the angular offset to the pulsar
is zero.
Note (2): Flag as follows:
dd = DM values that could not be improved by searching, and so
come directly from the ATNF catalog.
Note (3): Flag as follows:
d = pulsars with broken powerlaw spectral indices, which are
reported in Table 2:
-----------------------------------------------------------------------
PSR alphal alphah Break Frequency
(MHz)
-----------------------------------------------------------------------
J0034-0534 0.6(3) -3.1(2) 181
J0218+4232 1.15(7) -2.7(4) 149
J1900-2600 0.2(4) -1.89(15) 204
J2002+4050 0.2(16) -1.51(18) 378
------------------------------------------------------------------------
Notes: Quantities in parentheses are uncertainties in the last digit.
Spectral indices below (alphal) and above (alphah) the break.
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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- 11 A11 --- PSR PSR name (JHHMM+DDMM or (JHHMM+DD)
13- 21 F9.5 pc/cm3 DMc [8.09/345.5] Dispersion measure, ATNF catalog
23- 29 F7.5 pc/cm3 e_DMc [6e-05/8] Uncertainty in DM
31- 37 F7.3 pc/cm3 DMs [8.07/346.6] Dispersion measure, this search
39- 43 F5.3 pc/cm3 e_DMs [0.002/1.8] Uncertainty in DM
45- 49 F5.3 s Per [0.002/2.5] Period
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Byte-by-byte Description of file: refs.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- Ref [1/78] Reference code
4- 22 A19 --- BibCode Bibcode of the reference
24- 47 A24 --- Auth First author's name(s)
49-122 A74 --- Comm Comment
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History:
From electronic version of the journal
Acknowledgements:
Alexander Eli McEwen
References:
Stovall et al. Paper I. 2014ApJ...791...67S 2014ApJ...791...67S
Karako-Argaman et al. Comp. Paper 2015ApJ...809...67K 2015ApJ...809...67K
Kawash et al. Paper II. 2018ApJ...857..131K 2018ApJ...857..131K
Lynch et al. Paper III. 2018ApJ...859...93L 2018ApJ...859...93L
Aloisi et al. Paper IV. 2019ApJ...875...19A 2019ApJ...875...19A
McEwen et al. Paper V. 2020ApJ...892...76M 2020ApJ...892...76M This catalog
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 13-Aug-2021