J/MNRAS/328/855 Pulsar timing at UAO (Wang+, 2001)
Pulsar timing at Urumqi Astronomical Observatory: observing system and results.
Wang N., Manchester R.N., Zhang J., Wu X.J., Yusup A., Lyne A.G.,
Cheng K.S., Chen M.Z.
<Mon. Not. R. Astron. Soc. 328, 855 (2001)>
=2001MNRAS.328..855W 2001MNRAS.328..855W
ADC_Keywords: Pulsars ; Positional data
Keywords: astronomical data bases: miscellaneous - pulsars: general
Abstract:
A pulsar timing system has been operating in the 18-cm band at the
Urumqi Astronomical Observatory 25-m telescope since mid-1999.
Frequency resolution allowing de-dispersion of the pulsar signals is
provided by a 2x128x2.5MHz filterbank/digitizer system. Observations
of 74 pulsars over more than 12 months have resulted in updated pulsar
periods and period derivatives, as well as improved positions.
Comparison with previous measurements showed that the changes in
period and period derivative tend to have the same sign and to be
correlated in amplitude. A model based on unseen glitches gives a good
explanation of the observed changes, suggesting that long-term
fluctuations in period and period derivatives are dominated by
glitches. In 2000 July, we detected a glitch of relative amplitude
Δν/ν∼24x10-9in the Crab pulsar. The post-glitch decay
appears similar to other large Crab glitches.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 112 74 Pulsars positions from catalogue and this work
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See also:
VII/156 : Catalog of 558 Pulsars (Taylor+ 1993)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- PSRJ J2000 pulsar designation
11- 17 A7 --- PSRB B1950 pulsar designation
19- 20 I2 h RAh Catalog right ascension (J2000)
22- 23 I2 min RAm Catalog right ascension (J2000)
25- 30 F6.3 s RAs Catalog right ascension (J2000)
32- 36 I5 10-3s e_RAs rms uncertainty on RAc (J2000)
39 A1 --- DE- Catalog declination sign (J2000)
40- 41 I2 deg DEd Catalog declination (J2000)
43- 44 I2 arcmin DEm Catalog declination (J2000)
46- 50 F5.2 arcsec DEs Catalog declination (J2000)
52- 55 I4 10mas e_DEs rms uncertainty of catalog declination (J2000)
58- 62 A5 --- Ref Reference for catalog positions (1)
64- 65 I2 h RA1h ? Observed Right ascension (J2000)
67- 68 I2 min RA1m ? Observed Right ascension (J2000)
70- 76 F7.4 s RA1s ? Observed Right ascension (J2000)
78- 81 I4 10-4s e_RA1s ? rms uncertainty on observed RA (J2000)
84 A1 --- DE1- Declination sign (J2000)
85- 86 I2 deg DE1d ? Observed Declination (J2000)
88- 89 I2 arcmin DE1m ? Observed Declination (J2000)
91- 95 F5.2 arcsec DE1s ? Observed Declination (J2000)
97-100 I4 10mas e_DE1s ? Observed Declination (J2000)
102-106 I5 d MJD1 Data span (MJD of beginning)
107 A1 --- --- [-]
108-112 I5 d MJD2 Data span (MJD of end)
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Note (1): References as follows:
1 = Downs & Reichley, 1983ApJS...53..169D 1983ApJS...53..169D
2 = Arzoumanian et al., 1994ApJ...422..671A 1994ApJ...422..671A
3 = Fomalont et al., 1992MNRAS.258..497F 1992MNRAS.258..497F
4 = Fomalont et al., 1997MNRAS.286...81F 1997MNRAS.286...81F
5 = Dewey et al., 1988ApJ...332..762D 1988ApJ...332..762D
6 = McNamara, 1973PASP...83..491M 1973PASP...83..491M
7 = Siegman, Manchester & Durdin, 1993MNRAS.262..449S 1993MNRAS.262..449S
8 = Newton, Manchester & Cooke, 1981MNRAS.194..841N 1981MNRAS.194..841N
9 = Manchester & Taylor, 1981AJ.....86.1953M 1981AJ.....86.1953M
10 = Johnston et al., 1995A&A...293..795J 1995A&A...293..795J
11 = Braun, Goss & Lyne, 1989ApJ...340..355B 1989ApJ...340..355B
12 = Taylor et al., 1993, Cat. VII/156
13 = Vivekanand, Mohanty & Salter, 1983MNRAS.204p..81V 1983MNRAS.204p..81V
14 = Clifton et al., 1992MNRAS.254..177C 1992MNRAS.254..177C
15 = Manchester et al., 1996MNRAS.279.1235M 1996MNRAS.279.1235M
16 = Backus, Taylor & Damashek, 1982ApJ...255L..63B 1982ApJ...255L..63B
17 = Gullahorn & Rankin, 1978AJ.....83.1219G 1978AJ.....83.1219G
18 = Foster, Backer & Wolszczan, 1990ApJ...356..243F 1990ApJ...356..243F
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History:
From electronic version of the journal
(End) James Marcout, Patricia Bauer [CDS] 22-Jan-2002