@article{588a2b9996fd4e8c876830e02818850f,
title = "The Green Bank North Celestial Cap Pulsar Survey. III. 45 New Pulsar Timing Solutions",
abstract = "We provide timing solutions for 45 radio pulsars discovered by the Robert C. Byrd Green Bank Telescope. These pulsars were found in the Green Bank North Celestial Cap pulsar survey, an all-GBT-sky survey being carried out at a frequency of 350 MHz. We include pulsar timing data from the Green Bank Telescope and Low Frequency Array. Our sample includes five fully recycled millisecond pulsars (MSPs, three of which are in a binary system), a new relativistic double neutron star system, an intermediate-mass binary pulsar, a mode-changing pulsar, a 138 ms pulsar with a very low magnetic field, and several nulling pulsars. We have measured two post-Keplerian parameters and thus the masses of both objects in the double neutron star system. We also report a tentative companion mass measurement via Shapiro delay in a binary MSP. Two of the MSPs can be timed with high precision and have been included in pulsar timing arrays being used to search for low-frequency gravitational waves, while a third MSP is a member of the black widow class of binaries. Proper motion is measurable in five pulsars, and we provide an estimate of their space velocity. We report on an optical counterpart to a new black widow system and provide constraints on the optical counterparts to other binary MSPs. We also present a preliminary analysis of nulling pulsars in our sample. These results demonstrate the scientific return of long timing campaigns on pulsars of all types.",
keywords = "proper motions, pulsars: general, surveys",
author = "Lynch, {Ryan S.} and Swiggum, {Joseph K.} and Kondratiev, {Vlad I.} and Kaplan, {David L.} and Kevin Stovall and Emmanuel Fonseca and Roberts, {Mallory S.E.} and Lina Levin and Decesar, {Megan E.} and Bingyi Cui and Cenko, {S. Bradley} and Pradip Gatkine and Archibald, {Anne M.} and Shawn Banaszak and Biwer, {Christopher M.} and Jason Boyles and Pragya Chawla and Dartez, {Louis P.} and David Day and Ford, {Anthony J.} and Joseph Flanigan and Hessels, {Jason W.T.} and Jesus Hinojosa and Jenet, {Fredrick A.} and Chen Karako-Argaman and Kaspi, {Victoria M.} and Sean Leake and Grady Lunsford and Martinez, {Jos{\'e} G.} and Alberto Mata and McLaughlin, {Maura A.} and Noori, {Hind Al} and Ransom, {Scott M.} and Rohr, {Matthew D.} and Xavier Siemens and Ren{\'e}e Spiewak and Stairs, {Ingrid H.} and Leeuwen, {Joeri Van} and Walker, {Arielle N.} and Wells, {Bradley L.}",
note = "Funding Information: We thank the anonymous referee whose comments improved the quality of this work. The Green Bank Observatory is a facility of the National Science Foundation (NSF) operated under cooperative agreement by Associated Universities, Inc. This paper is based in part on data obtained with the International LOFAR Telescope (ILT). LOFAR (van Haarlem et al. 2013) is the Low Frequency Array designed and constructed by ASTRON. It has facilities in several countries that are owned by various parties (each with their own funding sources) and collectively operated by the ILT foundation under a joint scientific policy. These results also made use of Lowell Observatory{\textquoteright}s Discovery Channel Telescope. Lowell operates the DCT in partnership with Boston University, Northern Arizona University, the University of Maryland, and the University of Toledo. Partial support of the DCT was provided by Discovery Communications. LMI was built by Lowell Observatory using funds from the NSF (AST-1005313). This paper includes data taken at the McDonald Observatory of the University of Texas at Austin. IRAF is distributed by the National Optical Astronomy Observatory, which is operated by the Association of Universities for Research in Astronomy (AURA) under cooperative agreement with the NSF. J.K.S., M.E.D., F.A.J., D.L.K., M.A.M., S.M.R., K.S., and X.S. are supported by NANOGrav NSF Physics Frontiers Center award number 1430284. MED also acknowledges support from NSF award number AST-1312822. V.I.K. and J.W.T.H. acknowledge funding from an NWO Vidi fellowship and the European Research Council under the European Union{\textquoteright}s Seventh Framework Programme (FP/2007–2013)/ERC Starting Grant agreement no. 337062 (“DRAGNET”). V.M.K. receives support from an NSERC Discovery Grant and Accelerator Supplement, the Centre de Recherche en Astrophysique du Qu{\'e}bec, an R. Howard Webster Foundation Fellowship from the Canadian Institute for Advanced Research, the Canada Research Chairs Program, and the Lorne Trottier Chair in Astrophysics and Cosmology. M.A.M. and B.C. were supported by NSF awards AST-1327526 and OIA-1458952. S.M.R. is a Canadian Institute for Advanced Research Senior Fellow. I.H.S. and pulsar research at UBC are supported by an NSERC Discovery Grant and the Canadian Institute for Advanced Research. J.vL. receives funding from the European Research Council under the European Union{\textquoteright}s Seventh Framework Programme (FP/2007–2013)/ERC Grant Agreement no. 617199. Publisher Copyright: {\textcopyright} 2018. The American Astronomical Society. All rights reserved.",
year = "2018",
month = jun,
day = "1",
doi = "10.3847/1538-4357/aabf8a",
language = "English (US)",
volume = "859",
journal = "Astrophysical Journal",
issn = "0004-637X",
publisher = "IOP Publishing Ltd.",
number = "2",
}