J/ApJ/763/80 GBT 350MHz survey. I. 13 new pulsars (Boyles+, 2013)
The Green Bank Telescope 350 MHz drift-scan survey.
I. Survey observations and the discovery of 13 pulsars.
Boyles J., Lynch R.S., Ransom S.M., Stairs I.H., Lorimer D.R.,
McLaughlin M.A., Hessels J.W.T., Kaspi V.M., Kondratiev V.I., Archibald A.,
Berndsen A., Cardoso R.F., Cherry A., Epstein C.R., Karako-Argaman C.,
McPhee C.A., Pennucci T., Roberts M.S.E., Stovall K., van Leeuwen J.
<Astrophys. J., 763, 80 (2013)>
=2013ApJ...763...80B 2013ApJ...763...80B
ADC_Keywords: Pulsars ; Radio continuum ; Surveys
Keywords: pulsars: general; stars: neutron;
pulsars: individual (PSR J1327-0755, PSR J1623-0841, PSR J1737-0814)
Abstract:
Over the summer of 2007, we obtained 1191hr of "drift-scan" pulsar
search observations with the Green Bank Telescope at a radio frequency
of 350MHz. Here we describe the survey setup, search procedure, and
the discovery and follow-up timing of 13 pulsars. Among the new
discoveries, one (PSR J1623-0841) was discovered only through its
single pulses, two (PSRs J1327-0755 and J1737-0814) are millisecond
pulsars, and another (PSR J2222-0137) is a mildly recycled pulsar.
PSR J1327-0755 is a 2.7ms pulsar at a dispersion measure (DM) of
27.9pc/cm3 in an 8.7 day orbit with a minimum companion mass of
0.22M☉. PSR J1737-0814 is a 4.2ms pulsar at a DM of 55.3pc/cm3
in a 79.3 day orbit with a minimum companion mass of 0.06M☉.
PSR J2222-0137 is a 32.8ms pulsar at a very low DM of 3.27pc/cm3 in a
2.4 day orbit with a minimum companion mass of 1.11M☉. It is
most likely a white-dwarf-neutron-star system or an unusual
low-eccentricity double neutron star system. Ten other pulsars
discovered in this survey are reported in the companion paper Lynch et
al. (2013ApJ...763...81L 2013ApJ...763...81L).
Description:
The drift-scan observations occurred from 2007 May through August. The
telescope was parked at a set azimuth during the track refurbishing
and data were recorded, at a radio frequency of 350MHz, while the sky
drifted through the telescope's beam. In total, 1491hr of data were
taken, amounting to 134TB (see Table 5 for the observation list and
Figure 1 for sky coverage area of 10347deg2).
Timing observations began in 2008 June. At that stage, nine new
pulsars that had been discovered were observed. The first session was
conducted at a central frequency of 350MHz with the GBT. Most of the
rest of the follow-up timing observations in the first year (2008
July-2009 May) were conducted using the Spigot backend at a central
frequency of 820MHz (see section 3).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
psr.dat 115 13 Derived parameters for newly discovered pulsars
(table added by CDS from tables 1-3)
table5.dat 34 193 List of observations taken during the
drift-scan survey
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See also:
J/MNRAS/423/1351 : Energy distribution in pulsars (Burke-Spolaor+, 2012)
J/MNRAS/372/777 : Parkes Multibeam Pulsar Survey. VI. (Lorimer+, 2006)
J/MNRAS/359/1524 : 10 new pulsars in Arecibo drift-scan survey (Lorimer+, 2005)
J/MNRAS/352/1439 : Parkes Multi-Beam Pulsar Survey. IV. (Hobbs+, 2004)
J/MNRAS/335/275 : Parkes Multi-Beam Pulsar Survey new PSR (Morris+, 2002)
J/MNRAS/328/17 : Parkes Multi-Beam Pulsar Survey (Manchester+, 2001)
J/A+AS/147/195 : Pulsar spectra of radio emission (Maron+, 2000)
J/A+AS/136/571 : Pulsars identified from the NRAO VLA Sky Survey (Han+ 1999)
http://www.pulsarsearchcollaboratory.com/ : PSC database home page
http://www.atnf.csiro.au/research/pulsar/psrcat/ : ATNF pulsar catalog
Byte-by-byte Description of file: psr.dat
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Bytes Format Units Label Explanations
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1- 3 A3 --- --- [PSR]
5- 14 A10 --- PSR PSR name (JHHMM+DDMM)(1)
15 A1 --- f_PSR b: binary (see text)
17- 18 I2 h RAh Hour of right ascension (J2000)
20- 21 I2 min RAm Minute of right ascension (J2000)
23- 30 F8.5 s RAs Second of right ascension (J2000)
32- 38 F7.5 s e_RAs RAs uncertainty
40 A1 --- DE- Sign of declination (J2000)
41- 42 I2 deg DEd Degree of declination (J2000)
44- 45 I2 arcmin DEm Arcminute of declination (J2000)
47- 52 F6.3 arcsec DEs Arcsecond of declination (J2000)
54- 59 F6.3 arcsec e_DEs DEs uncertainty
61- 68 F8.5 pc/cm3 DM [3/67] Dispersion measure
70- 76 F7.5 pc/cm3 e_DM DM uncertainty
78- 82 I5 d Epoch Reference epoch (MJD)
84- 87 F4.2 kpc Dist [0.3/4] Distance
89- 95 F7.1 Myr Age [4.1/11000] Characteristic age
97-100 F4.2 mJy F820 [0.4/3] 820MHz flux density
102-105 F4.2 mJy e_F820 F820 uncertainty
107-111 F5.1 rad/m2 RM [-92/72]? Rotation measure
113-115 F3.1 rad/m2 e_RM ? RM uncertainty
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Note (1): PSR J1633+2009 was a misprint for PSR J1633-2010; corrected at CDS
thanks to Jason Boyles.
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Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 12 F12.6 d Start Modified Julian Date of start
14- 18 I5 s Time [80/49680] Duration
20- 26 F7.3 deg Az [170/232] Azimuth angle
28- 31 F4.1 deg El [29/80] Elevation
33- 34 I2 --- Bits [8/16] Number of bits stored
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History:
From electronic version of the journal
References:
Lynch et al. Paper II. 2013ApJ...763...81L 2013ApJ...763...81L
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 17-Oct-2014