J/ApJS/255/5 CHIME/Pulsar 400-800MHz obs. of ATNF pulsars (Amiri+, 2021)
The CHIME pulsar project: system overview.
Amiri M., Bandura K.M., Boyle P.J., Brar C., Cliche J.-F., Crowter K.,
Cubranic D., Demorest P.B., Denman N.T., Dobbs M., Dong F.Q., Fandino M.,
Fonseca E., Good D.C., Halpern M., Hill A.S., Hofer C., Kaspi V.M.,
Landecker T.L., Leung C., Lin H.-H., Luo J., Masui K.W., Mckee J.W.,
Mena-parra J., Meyers B.W., Michilli D., Naidu A., Newburgh L., Ng C.,
Patel C., Pinsonneault-Marotte T., Ransom S.M., Renard A., Scholz P.,
Shaw J.R., Sikora A.E., Stairs I.H., Tan C.M., Tendulkar S.P.,
Tretyakov I., Vanderlinde K., Wang H., Wang X.
<Astrophys. J. Suppl. Ser., 255, 5-5 (2021)>
=2021ApJS..255....5A 2021ApJS..255....5A (SIMBAD/NED BibCode)
ADC_Keywords: Pulsars; Radio sources
Keywords: Astronomy data acquisition; Astronomy data analysis; Radio astronomy
Radio pulsars; Pulsar timing method; Astronomical instrumentation
Abstract:
We present the design, implementation, and performance of the digital
pulsar observing system constructed for the Canadian Hydrogen
Intensity Mapping Experiment (CHIME). Using accelerated computing,
this system processes independent, digitally steered beams formed by
the CHIME correlator to simultaneously observe up to 10 radio pulsars
and transient sources. Each of these independent streams is processed
by the CHIME/Pulsar back-end system, which can coherently dedisperse,
in real time, up to dispersion measure values of 2500pc/cm3. The
tracking beams and real-time analysis system are autonomously
controlled by a priority-based algorithm that schedules both known
sources and positions of interest for observation with observing
cadences as rapid as 1 day. Given the distribution of known pulsars
and radio-transient sources and the dynamic scheduling, the
CHIME/Pulsar system can monitor 400-500 positions once per sidereal
day and observe most sources with declinations greater than -20°
once every ∼4 weeks. We also discuss the extensive science program
enabled through the current modes of data acquisition for CHIME/Pulsar
that centers on timing and searching experiments.
Description:
The Canadian Hydrogen Intensity Mapping Experiment (CHIME) is a radio
interferometer operating in the 400-800MHz frequency range located at
the Dominion Radio Astrophysical Observatory (DRAO) in Penticton,
British Columbia, Canada. The CHIME telescope consists of four 5m
focal length parabolic cylinders that are 20m wide and 100m long.
CHIME/Pulsar is a flexible system with a variety of acquisition modes
that is designed for continuous and autonomous operation.
We collected observing statistics for all pulsars from the ATNF Pulsar
Catalogue over a representative time period, MJD 59100-59274 (Sept 2020
to March 2021), where the scheduling algorithm described in Section 3.4
was executed with no modifications. See Table 3.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 27 1023 The observed sources
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See also:
B/psr : ATNF Pulsar Catalogue (Manchester+, 2005)
J/ApJ/605/759 : Multifrequency obs. of radio pulse broadening (Bhat+, 2004)
J/MNRAS/353/1311 : Long-term timing observations of 374 pulsars (Hobbs+, 2004)
J/MNRAS/414/1679 : 315 glitches in the rotation of pulsars (Espinoza+, 2011)
J/MNRAS/484/3646 : LOFAR PSR low-frequency Faraday rot. measures (Sobey+ 2019)
J/MNRAS/484/3691 : UTMOST pulsar timing programme. I. (Jankowski+, 2019)
J/MNRAS/501/1116 : GAIA pulsars and where to find them (Antoniadis, 2021)
Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 11 A11 --- PSR Pulsar identifier
13- 17 I5 d MJD [58170/59254] Modified Julian Day of start
19- 21 F3.1 --- Nobs [0.1/7] Mean number of observation per week (1)
23- 27 I5 --- S/N [3/27109] Mean Signal-to-Noise calculated over
a representative 3-month period (2)
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Note (1): Calculated over a representative 3-month period.
Note (2): Computed after integrating over transit time and observing frequency.
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History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 25-Oct-2021