The NANOGrav 15 yr Data Set: Observations and Timing of 68 Millisecond Pulsars

The NANOGrav 15 yr Data Set: Observations and Timing of 68 Millisecond Pulsars
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DOI：
10.3847/2041-8213/acda9a
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发表时间：
2023-06
期刊：
The Astrophysical Journal Letters
影响因子：
--
通讯作者：
G. Agazie;Md F. Alam;A. Anumarlapudi;A. Archibald;Z. Arzoumanian;P. Baker;L. Blecha;Victoria Bonidie;A. Brazier;P. Brook;S. Burke-Spolaor;B. B'ecsy;Christopher Chapman;M. Charisi;S. Chatterjee;T. Cohen;J. Cordes;N. Cornish;F. Crawford;H. Cromartie;K. Crowter;M. DeCesar;P. Demorest;T. Dolch;B. Drachler;E. Ferrara;W. Fiore;E. Fonseca;G. Freedman;N. Garver-Daniels;P. Gentile;J. Glaser;D. Good;K. Gultekin;J. Hazboun;R. Jennings;Cody Jessup;A. Johnson;Megan L. Jones;A. Kaiser;D. Kaplan;L. Kelley;M. Kerr;J. Key;A. Kuske;N. Laal;M. Lam;W. Lamb;T. Lazio;N. Lewandowska;Ye Lin;Tianyu Liu;D. Lorimer;Jing Luo;R. Lynch;Chung-Pei Ma;D. Madison;Kaleb Maraccini;A. McEwen;J. McKee;Maura A. McLaughlin;N. McMann;B. W. Meyers;C. Mingarelli;A. Mitridate;C. Ng;D. Nice;S. Ocker;K. Olum;Elisa Panciu;T. Pennucci;B. Perera;N. Pol;H. Radovan;S. Ransom;P. Ray;J. Romano;Laura Salo;S. C. Sardesai;C. Schmiedekamp;A. Schmiedekamp;K. Schmitz;B. Shapiro-Albert;X. Siemens;J. Simon;M. Siwek;I. Stairs;D. Stinebring;K. Stovall;A. Susobhanan;J. Swiggum;S. Taylor;J. E. Turner;C. Unal;M. Vallisneri;S. Vigeland;H. Wahl;Qiaohong Wang;C. Witt;O. Young
G. Agazie;Md F. Alam;A. Anumarlapudi;A. Archibald;Z. Arzoumanian;P. Baker;L. Blecha;Victoria Bonidie;A. Brazier;P. Brook;S. Burke-Spolaor;B. B'ecsy;Christopher Chapman;M. Charisi;S. Chatterjee;T. Cohen;J. Cordes;N. Cornish;F. Crawford;H. Cromartie;K. Crowter;M. DeCesar;P. Demorest;T. Dolch;B. Drachler;E. Ferrara;W. Fiore;E. Fonseca;G. Freedman;N. Garver-Daniels;P. Gentile;J. Glaser;D. Good;K. Gultekin;J. Hazboun;R. Jennings;Cody Jessup;A. Johnson;Megan L. Jones;A. Kaiser;D. Kaplan;L. Kelley;M. Kerr;J. Key;A. Kuske;N. Laal;M. Lam;W. Lamb;T. Lazio;N. Lewandowska;Ye Lin;Tianyu Liu;D. Lorimer;Jing Luo;R. Lynch;Chung-Pei Ma;D. Madison;Kaleb Maraccini;A. McEwen;J. McKee;Maura A. McLaughlin;N. McMann;B. W. Meyers;C. Mingarelli;A. Mitridate;C. Ng;D. Nice;S. Ocker;K. Olum;Elisa Panciu;T. Pennucci;B. Perera;N. Pol;H. Radovan;S. Ransom;P. Ray;J. Romano;Laura Salo;S. C. Sardesai;C. Schmiedekamp;A. Schmiedekamp;K. Schmitz;B. Shapiro-Albert;X. Siemens;J. Simon;M. Siwek;I. Stairs;D. Stinebring;K. Stovall;A. Susobhanan;J. Swiggum;S. Taylor;J. E. Turner;C. Unal;M. Vallisneri;S. Vigeland;H. Wahl;Qiaohong Wang;C. Witt;O. Young
中科院分区：
其他
文献类型：
--
作者：
G. Agazie;Md F. Alam;A. Anumarlapudi;A. Archibald;Z. Arzoumanian;P. Baker;L. Blecha;Victoria Bonidie;A. Brazier;P. Brook;S. Burke-Spolaor;B. B'ecsy;Christopher Chapman;M. Charisi;S. Chatterjee;T. Cohen;J. Cordes;N. Cornish;F. Crawford;H. Cromartie;K. Crowter;M. DeCesar;P. Demorest;T. Dolch;B. Drachler;E. Ferrara;W. Fiore;E. Fonseca;G. Freedman;N. Garver-Daniels;P. Gentile;J. Glaser;D. Good;K. Gultekin;J. Hazboun;R. Jennings;Cody Jessup;A. Johnson;Megan L. Jones;A. Kaiser;D. Kaplan;L. Kelley;M. Kerr;J. Key;A. Kuske;N. Laal;M. Lam;W. Lamb;T. Lazio;N. Lewandowska;Ye Lin;Tianyu Liu;D. Lorimer;Jing Luo;R. Lynch;Chung-Pei Ma;D. Madison;Kaleb Maraccini;A. McEwen;J. McKee;Maura A. McLaughlin;N. McMann;B. W. Meyers;C. Mingarelli;A. Mitridate;C. Ng;D. Nice;S. Ocker;K. Olum;Elisa Panciu;T. Pennucci;B. Perera;N. Pol;H. Radovan;S. Ransom;P. Ray;J. Romano;Laura Salo;S. C. Sardesai;C. Schmiedekamp;A. Schmiedekamp;K. Schmitz;B. Shapiro-Albert;X. Siemens;J. Simon;M. Siwek;I. Stairs;D. Stinebring;K. Stovall;A. Susobhanan;J. Swiggum;S. Taylor;J. E. Turner;C. Unal;M. Vallisneri;S. Vigeland;H. Wahl;Qiaohong Wang;C. Witt;O. Young

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我们给出了由北美纳赫兹引力波天文台(NANOGrav)15年的数据集组成的68毫秒脉冲星(MSPS)的观测和时间分析。NANOGrav是一个脉冲星定时阵列(PTA)实验，对低频引力波(GWS)很敏感。这是NANOGrav公布的第五份公开数据，其中包括窄带和宽带到达时间(TOA)测量以及相应的脉冲星计时模型。我们增加了21个MSP，并将我们的计时基线延长了3年，现在我们的一些来源跨越了近16年。这些数据是使用阿雷西博天文台、绿岸望远镜和频率在327兆赫和3吉赫兹之间的甚大阵列收集的，大多数震源大约每月观测一次。与我们以前的数据集相比，在方法和程序上进行了一些显着的改变。这些改进了TOA数据集的整体质量，是向新的脉冲星计时和PTA分析软件包过渡的一部分。我们的数据产品首次配备了全套软件来复制数据简化、分析和结果。我们的计时模型包括各种新检测到的天体测量和双星脉冲星参数，包括对脉冲星质量约束的几项重大改进。我们发现，23颗脉冲星的时间序列包含可检测到的红色噪声水平，其中10个是新测量的。在这个数据集中，我们找到了随机GW背景的证据。
We present observations and timing analyses of 68 millisecond pulsars (MSPs) comprising the 15 yr data set of the North American Nanohertz Observatory for Gravitational Waves (NANOGrav). NANOGrav is a pulsar timing array (PTA) experiment that is sensitive to low-frequency gravitational waves (GWs). This is NANOGrav’s fifth public data release, including both “narrowband” and “wideband” time-of-arrival (TOA) measurements and corresponding pulsar timing models. We have added 21 MSPs and extended our timing baselines by 3 yr, now spanning nearly 16 yr for some of our sources. The data were collected using the Arecibo Observatory, the Green Bank Telescope, and the Very Large Array between frequencies of 327 MHz and 3 GHz, with most sources observed approximately monthly. A number of notable methodological and procedural changes were made compared to our previous data sets. These improve the overall quality of the TOA data set and are part of the transition to new pulsar timing and PTA analysis software packages. For the first time, our data products are accompanied by a full suite of software to reproduce data reduction, analysis, and results. Our timing models include a variety of newly detected astrometric and binary pulsar parameters, including several significant improvements to pulsar mass constraints. We find that the time series of 23 pulsars contain detectable levels of red noise, 10 of which are new measurements. In this data set, we find evidence for a stochastic GW background.