The GMRT High Resolution Southern Sky Survey for pulsars and transients -II. New discoveries, timing and polarization properties
B. Bhattacharyya, J. Roy, B. W. Stappers, T. Johnson, C. D. Ilie, A. Lyne, M. Malenta, P. Weltevrede, J. Chengalur, S. Cooper, B. Kaur, M. Keith, M. Kerr, S. Ku… 展开作者
B. Bhattacharyya, J. Roy, B. W. Stappers, T. Johnson, C. D. Ilie, A. Lyne, M. Malenta, P. Weltevrede, J. Chengalur, S. Cooper, B. Kaur, M. Keith, M. Kerr, S. Kudale, M. A. McLaughlin, S. M. Ransom, P. S. Ray
备注:
29 pages, 9 figures and 5 tables, Accepted for publication in ApJ
在过去的四年里,我们一直在进行GMRT高分辨率南天(GHRSS)调查,迄今为止已经发现了18颗彗星。GHRSS巡天是一次在322 MHz的银河平面外巡天,在天空的一个区域(-40度至-54度的范围)进行,与其他正在进行的低频巡天互补。本文报道了三颗新发现的太阳黑子J1239-48、J1516-43和J1726-52。我们还给出了GHRSS巡天中发现的三颗脉冲星的时间解:PSR J2144-5237,一颗周期为P=5 ms的毫秒脉冲星,在10天的轨道上环绕一颗质量小于0.18 Msun的伴星; PSR J1516-43,一颗周期为P=36 ms的脉冲星,在228天的轨道上环绕一颗质量约为0.4 Msun的伴星; P=320 ms PSR J 0514 -4408是脉冲$γ$射线发射源。我们还报告了三个GHRSS发现,PSR J 0418 -4154,J 0514 -4408和J2144-5237的射电偏振观测。
英文摘要:
We have been conducting the GMRT High Resolution Southern Sky (GHRSS) survey for the last four years and have discovered 18 pulsars to date. The GHRSS survey is an off-Galactic-plane survey at 322 MHz in a region of the sky (declination range -40 degrees to -54 degrees) complementary to other ongoing low-frequency surveys. In this paper we report the discovery of three pulsars, PSRs J1239-48, J1516-43 and J1726-52. We also present timing solutions for three pulsars previously discovered with the GHRSS survey: PSR J2144-5237, a millisecond pulsar with a period P=5 ms in a 10 day orbit around a < 0.18 Msun companion; PSR J1516-43, a mildly recycled P=36 ms pulsar in a 228 day orbit with a companion of mass ~0.4 Msun; and the P=320 ms PSR J0514-4408 which we show is a source of pulsed $γ$-ray emission. We also report radio polarimetric observations of three of the GHRSS discoveries, PSRs J0418-4154, J0514-4408 and J2144-5237.
The GMRT High-Resolution Southern Sky Survey for pulsars and transients -- VII: Timing of Spider MSP J1242-4712, A Bridge Between Redback and Black Widow Pulsars
The GMRT High Resolution Southern Sky Survey for pulsars and transients -- III: searching for long period pulsars
在理想白噪声背景下,利用全相位相干快速折叠算法(FFA)搜索周期性非加速信号,理论上比非相干谐波求和快速傅里叶变换(FFT)搜索更灵敏。在本文中,我们提出了一个FFA搜索实现使用RIPTIDE和FFT搜索实现使用PRESTO的性能比较,在一个范围内的信号参数与白噪声和真正的望远镜噪声从GHRSS调查与uGMRT。我们发现,FFA搜索与适当的去红的时间序列,表现出更好的比FFT搜索与频谱白化的长周期序列在真正的GHRSS噪声条件。我们描述了一个FFA搜索管道实施的GHRSS调查寻找在0.1秒至100秒的时间范围内,高达500 pc cm $^{-3}$的分散措施的雷达。我们使用该管道处理了覆盖天空$^2$的$\sim$ 1500度的GHRSS测量数据。我们重新检测了43个已知的信号,FFA搜索比FFT搜索具有更好的信噪比。我们还报告发现了两个新的脉冲星,包括一个长周期脉冲星,具有短的占空比与FFA搜索管道。周期为几秒或更长的长周期脉冲星的数量有助于限制脉冲星的死亡线。
The GMRT High-Resolution Southern Sky Survey for pulsars and transients -- VIII: Orbital Variability and the Evolution of a 1-Day He-WD Millisecond Pulsar J2101-4802
National Centre For Radio Astrophysics, Tata Institute of Fundamental Research(塔塔基础研究所射电天体物理国家中心);Center for Gravitation, Cosmology, and Astrophysics, Department of Physics, University of Wisconsin-Milwaukee(威斯康星大学密尔沃基分校物理系引力、宇宙学与天体物理中心);Laboratoire d’Astrophysique de Bordeaux, Université de Bordeaux, CNRS(波尔多大学CNRS波尔多天体物理实验室);Jodrell Bank Centre for Astrophysics, School of Physics and Astronomy, The University of Manchester(曼彻斯特大学物理与天文学院乔德雷尔银行天体物理中心)
Globular Clusters GMRT Pulsar Search (GCGPS) II: Discovery of five MSPs in M69 and M70
National Centre for Radio Astrophysics (NCRA)(国家射电天文中心);Max-Planck-Institut für Radioastronomie (MPIfR)(马克斯·普朗克射电天文研究所);National Radio Astronomy Observatory (NRAO)(美国国家射电天文台);Department of Physics, Silesian University in Opava(俄帕瓦西里西亚大学物理系);Oxford e-Research Centre (OeRC) University of Oxford(牛津大学电子研究中心);Giant Metrewave Radio Telescope (GMRT)(巨型米波射电望远镜)
Survey of compact sources for pulsars and exotic objects -- I. Overview and initial discoveries
National Centre for Radio Astrophysics (NCRA - TIFR)(国家射电天体物理中心(NCRA-TIFR));ASTRON, the Netherlands Institute for Radio Astronomy(荷兰射电天文研究所(ASTRON));International Centre for Radio Astronomy Research, Curtin University(科廷大学国际射电天文研究中心);Inter-University Centre for Astronomy and Astrophysics(大学间天文学与天体物理学中心);Department of Astrophysics/IMAPP, Radboud University(拉德堡德大学天体物理学系/IMAPP)
The High Time Resolution Universe Pulsar Survey-XIX. A coherent GPU accelerated reprocessing and the discovery of 71 pulsars in the Southern Galactic plane
Pulsar searches of Fermi-LAT gamma-ray sources with the MWA
International Centre for Radio Astronomy Research, Curtin University(国际射电天文中心,科廷大学);Australian SKA Regional Centre (AusSRC), Curtin University(澳大利亚SKA区域中心,科廷大学);Manly Astrophysics(曼利天体物理学);Laboratoire d’Astrophysique de Bordeaux, Université de Bordeaux, CNRS(波尔多天体物理实验室,波尔多大学,法国国家科学研究中心)