J/ApJ/810/85 Observation of first Fermi-LAT sources at Parkes (Camilo+, 2015)
Parkes radio searches of Fermi gamma-ray sources and millisecond pulsar
discoveries.
Camilo F., Kerr M., Ray P.S., Ransom S.M., Sarkissian J., Cromartie H.T.,
Johnston S., Reynolds J.E., Wolff M.T., Freire P.C.C., Bhattacharyya B.,
Ferrara E.C., Keith M., Michelson P.F., Parkinson P.M.S., Wood K.S.
<Astrophys. J., 810, 85 (2015)>
=2015ApJ...810...85C 2015ApJ...810...85C (SIMBAD/NED BibCode)
ADC_Keywords: Pulsars ; Gamma rays ; Radio sources
Keywords: gamma-rays: stars - pulsars: individual: PSR J0955-6150,
PSR J1012-4235, PSR J1036-8317, PSR J1903-7051, PSR J1946-5403
Abstract:
In a search with the Parkes radio telescope of 56 unidentified
Fermi-Large Area Telescope (LAT) gamma-ray sources, we have detected
11 millisecond pulsars (MSPs), 10 of them discoveries, of which five
were reported by Kerr et al (2012ApJ...748L...2K 2012ApJ...748L...2K). We did not detect
radio pulsations from six other pulsars now known in these sources.
We describe the completed survey, which included multiple observations
of many targets conducted to minimize the impact of interstellar
scintillation, acceleration effects in binary systems, and eclipses.
We consider that 23 of the 39 remaining sources may still be viable
pulsar candidates. We present timing solutions and polarimetry for
five of the MSPs and gamma-ray pulsations for PSR J1903-7051
(pulsations for five others were reported in the second Fermi-LAT
catalog of gamma-ray pulsars). Two of the new MSPs are isolated and
five are in >1 day circular orbits with 0.2-0.3 M☉ presumed
white dwarf companions. PSR J0955-6150, in a 24 day orbit with a
0.2-0.3 M☉ companion but eccentricity of 0.11, belongs to a
recently identified class of eccentric MSPs. PSR J1036-8317 is in an 8 hr
binary with a>0.14 M☉ companion that is probably a white dwarf.
PSR J1946-5403 is in a 3 hr orbit with a>0.02 M☉ companion with
no evidence of radio eclipses.
Description:
Keith et al. (2011MNRAS.414.1292K 2011MNRAS.414.1292K) used a digital filterbank at Parkes
to search 11 unidentified sources from the first Fermi-LAT catalog
(1FGL; Abdo et al. 2010, J/ApJS/188/405). Two MSPs and one slow pulsar
were discovered in single observations of each target at a central
frequency of 1.4 GHz. Subsequently, one of these MSPs was found to be
associated with the corresponding LAT source. At nearly the same time,
in late 2009, we used an analog filterbank at Parkes to search 14
unidentified 1FGL sources (Kerr et al. 2012ApJ...748L...2K 2012ApJ...748L...2K). The
single observations of these targets resulted in the detection of six
MSPs, five of them discoveries. However, confirmation of some of these
MSPs was not easy: the search observations lasted for 1-2 hr each,
but some of the pulsars were not detected in equivalent initial
confirmation attempts, owing to the effects of interstellar
scintillation. These and other selection effects (see Section 2.2 for
details) led us to search some promising unidentified LAT sources
repeatedly.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 86 63 Radio Searches of FGL Sources at Parkes:
Observations
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See also:
VIII/15 : Parkes Radio Sources Catalogue (PKSCAT90) (Wright+ 1990)
J/ApJS/188/405 : Fermi-LAT first source catalog (1FGL) (Abdo+, 2010)
J/other/PASA/27.64 : Parkes Radio Telescope pulsar timing (Weltevrede+, 2010)
J/ApJS/208/17 : 2nd Fermi LAT cat. of gamma-ray pulsars (2PC)
(Abdo+, 2013)
J/ApJ/814/128 : Timing noise + astrometry of Fermi-LAT pulsars
(Kerr+, 2015)
J/ApJS/218/23 : Fermi LAT third source catalog (3FGL) (Acero+, 2015)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 4 A4 --- --- [3FGL]
5- 16 A12 --- 3FGL Source name (3FGL JHHMM.m+DDMM in Simbad) (1)
17- 20 A4 --- n_3FGL [d+*r ] Note on 3FGL (2)
22- 23 I2 h RAh Hour of Right Ascension (J2000) (3)
25- 26 I2 min RAm Minute of Right Ascension (J2000) (3)
28- 29 I2 s RAs Second of Right Ascension (J2000) (3)
31 A1 --- DE- Sign of the Declination (J2000) (3)
32- 33 I2 deg DEd Degree of Declination (J2000) (3)
35- 36 I2 arcmin DEm Arcminute of Declination (J2000) (3)
38- 39 I2 arcsec DEs Arcsecond of Declination (J2000) (3)
41- 45 F5.1 deg GLON Galactic longitude
47- 51 F5.1 deg GLAT Galactic latitude
53- 81 A29 min Tint Integration time(s) (4)
83- 86 I4 pc/cm3 DMmax Maximum trial dispersion measure (5)
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Note (1): The names given are of the 3FGL sources closest to our pointing
locations.
Note (2): Note as follows:
d = MSP discovered independently by Keith et al. (2011MNRAS.414.1292K 2011MNRAS.414.1292K);
+ = Discoveries in single-observation searches of the first 14 entries were
reported in Kerr et al. (2012ApJ...748L...2K 2012ApJ...748L...2K);
* = Denote observations with detection of MSPs;
r = Denote sources re-observed in 2012 at the improved locations listed below
the horizontal line.
Note (3): Parkes telescope pointing position.
Note (4): Individual integration times were about 1 hr, and each LAT source was
observed between one and nine times, depending on the then-perceived
quality of the source and telescope availability.
Note (5): Maximum trial dispersion measure (DM) used in our analysis of the
respective data set(s), corresponding approximately to twice the
maximum DM predicted by the Cordes & Lazio (2002astro.ph..7156C 2002astro.ph..7156C) model
for the corresponding line of sight. The first observation of each
first 14 sources was analyzed with DMmax=270 pc/cm3
(Kerr et al. 2012ApJ...748L...2K 2012ApJ...748L...2K).
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History:
From electronic version of the journal
(End) Prepared by Tiphaine Pouvreau [CDS] 02-Oct-2017