Query : 2009A&A...498..223J

2009A&A...498..223J - Astronomy and Astrophysics, volume 498, 223-231 (2009/4-4)

Discovery and timing of the first 8gr8 Cygnus survey pulsars.


Abstract (from CDS):

Since 2004 we have been carrying out a pulsar survey of the Cygnus region with the Westerbork Synthesis Radio Telescope (WSRT) at a frequency of 328MHz. The survey pioneered a novel interferometric observing mode, termed 8gr8 (eight-grate), whereby multiple simultaneous digital beams provide high sensitivity over a large field of view. Since the Cygnus region is known to contain OB associations, it is likely that pulsars are formed here. Simulations have shown that this survey could detect 70 pulsars, which would increase our understanding of the radio pulsar population in this region. We also aim to expand the known population of intermittent and rotating radio transient (RRAT)-like pulsars. In this paper we describe our methods of observation, processing and data analysis, and we present the first results. Our observing method exploits the way a regularly spaced, linear array of telescopes yields a corresponding regularly spaced series of so-called ``grating'' beams on the sky. By simultaneously forming a modest number (eight) of offset digital beams, we can utilize the entire field of view of each WSRT dish, but retain the coherently summed sensitivity of the entire array. For the processing we performed a large number of trial combinations of period and dispersion measure (DM) using a computer cluster. In the first processing cycle of the WSRT 8gr8Cygnus Survey, we have discovered three radio pulsars, with spin periods of 1.657, 1.099 and 0.445s. These pulsars have been observed on a regular basis since their discovery, both in a special follow-up programme as well as in the regular timing programme. The timing solutions are presented in this paper. We also discuss this survey method in the context of the SKA and its pathfinders. We have found three new pulsars using the WSRT. Reprocessing and further analysis of the data will reveal dimmer pulsars, and RRAT-like or intermittent pulsars.

Abstract Copyright:

Journal keyword(s): stars: neutron - pulsars: general

Simbad objects: 8

goto Full paper

goto View the references in ADS

Number of rows : 8
N Identifier Otype ICRS (J2000)
ICRS (J2000)
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
1 NAME Per Arm PoG 03 30 +45.0           ~ 1423 0
2 PSR J1937+2950 Psr 19 37 47.603 +29 50 01.80           ~ 6 0
3 PSR J2027+4557 Psr 20 27 16.2484935744 +45 57 56.862131904           ~ 7 0
4 NAME Cyg Complex reg 20 32 +45.0           ~ 572 0
5 SNR G089.0+04.7 SNR 20 45.0 +50 35           ~ 215 0
6 NAME Cyg Superbubble PoC 20 47 +41.2           ~ 77 1
7 PSR J2047+5029 Psr 20 47 54.640 +50 29 38.17           ~ 10 0
8 Ass Cyg OB 7 As* 21 08 +47.6           ~ 206 0

To bookmark this query, right click on this link: simbad:objects in 2009A&A...498..223J and select 'bookmark this link' or equivalent in the popup menu


© Université de Strasbourg/CNRS

    • Contact