TY - JOUR
T1 - The NANOGrav 15 yr Data Set
T2 - Observations and Timing of 68 Millisecond Pulsars
AU - The NANOGrav Collaboration
AU - Agazie, Gabriella
AU - Alam, Md Faisal
AU - Anumarlapudi, Akash
AU - Archibald, Anne M.
AU - Arzoumanian, Zaven
AU - Baker, Paul T.
AU - Blecha, Laura
AU - Bonidie, Victoria
AU - Brazier, Adam
AU - Brook, Paul R.
AU - Burke-Spolaor, Sarah
AU - Bécsy, Bence
AU - Chapman, Christopher
AU - Charisi, Maria
AU - Chatterjee, Shami
AU - Cohen, Tyler
AU - Cordes, James M.
AU - Cornish, Neil J.
AU - Crawford, Fronefield
AU - Cromartie, H. Thankful
AU - Crowter, Kathryn
AU - DeCesar, Megan E.
AU - Demorest, Paul B.
AU - Dolch, Timothy
AU - Drachler, Brendan
AU - Ferrara, Elizabeth C.
AU - Fiore, William
AU - Fonseca, Emmanuel
AU - Freedman, Gabriel E.
AU - Garver-Daniels, Nate
AU - Gentile, Peter A.
AU - Glaser, Joseph
AU - Good, Deborah C.
AU - Gültekin, Kayhan
AU - Hazboun, Jeffrey S.
AU - Jennings, Ross J.
AU - Jessup, Cody
AU - Johnson, Aaron D.
AU - Jones, Megan L.
AU - Kaiser, Andrew R.
AU - Kaplan, David L.
AU - Kelley, Luke Zoltan
AU - Kerr, Matthew
AU - Key, Joey S.
AU - Kuske, Anastasia
AU - Laal, Nima
AU - Lam, Michael T.
AU - Lamb, William G.
AU - W. Lazio, T. Joseph
AU - Schmiedekamp, Ann
N1 - Publisher Copyright:
© 2023. The Author(s). Published by the American Astronomical Society.
PY - 2023/7/1
Y1 - 2023/7/1
N2 - 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.
AB - 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.
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U2 - 10.3847/2041-8213/acda9a
DO - 10.3847/2041-8213/acda9a
M3 - Article
AN - SCOPUS:85164335799
SN - 2041-8205
VL - 951
JO - Astrophysical Journal Letters
JF - Astrophysical Journal Letters
IS - 1
M1 - L9
ER -