{"paper":{"title":"Discovery of 51 pulsars in a reanalysis of the Green Bank North Celestial Cap Survey and a revised pulsar census","arxiv_id":"2610.17280","primary_cat":"astro-ph.HE","submitted_at":"2026-10-12T18:33:34+00:00","version_compiled":"v1"},"notice":"Every quoted sentence is the authors' text from the arXiv listing abstract. Labels and probabilities are the outputs of classifier-1.13.0 on the question bank abstract-p1-20260923, exactly as returned. No sentence in this record was written by a language model.","schema":"pith.compiled-record/v0","status":"compiled","abstract":{"source":"arXiv listing abstract v1","sentences":[{"i":0,"p":0.65,"id":"s0","own":true,"role":"method","text":"We present results from a reanalysis of the Green Bank North Celestial Cap (GBNCC) survey, conducted at 350 MHz with the Green Bank Telescope between 2009 and 2020, covering the sky with declinations $\\delta>-40^\\circ$.","hedge":{"p":1.0,"label":"asserted"},"own_p":0.89,"main_claim_p":0.04,"quantitative":true,"quantitative_p":0.97,"role_probabilities":{"gap":0.0,"method":0.65,"result":0.0,"background":0.02,"limitation":0.0,"future_work":0.0,"contribution":0.33,"interpretation":0.0}},{"i":1,"p":1.0,"id":"s1","own":true,"role":"method","text":"We searched the survey data using an FFT-based periodicity search, with candidate selection extending to very low spectral signal-to-noise ratios and summing up to 32 harmonics.","hedge":{"p":1.0,"label":"asserted"},"own_p":0.95,"main_claim_p":0.02,"quantitative":true,"quantitative_p":0.94,"role_probabilities":{"gap":0.0,"method":1.0,"result":0.0,"background":0.0,"limitation":0.0,"future_work":0.0,"contribution":0.0,"interpretation":0.0}},{"i":2,"p":0.98,"id":"s2","own":true,"role":"result","text":"From the 60 promising candidates identified in this search, we confirmed 51 new pulsars using the Green bank and CHIME.","hedge":{"p":1.0,"label":"asserted"},"own_p":0.96,"main_claim_p":0.75,"quantitative":true,"quantitative_p":0.99,"role_probabilities":{"gap":0.0,"method":0.0,"result":0.98,"background":0.0,"limitation":0.0,"future_work":0.0,"contribution":0.02,"interpretation":0.0}},{"i":3,"p":0.98,"id":"s3","own":true,"role":"method","text":"We also used a direct folding search method (DFSM) to search for slow pulsars between 500 ms and 10 s.","hedge":{"p":1.0,"label":"asserted"},"own_p":0.96,"main_claim_p":0.03,"quantitative":true,"quantitative_p":0.98,"role_probabilities":{"gap":0.0,"method":0.98,"result":0.0,"background":0.0,"limitation":0.0,"future_work":0.0,"contribution":0.02,"interpretation":0.0}},{"i":4,"p":0.99,"id":"s4","own":true,"role":"result","text":"Of the 51 pulsars identified in the FFT search, 43 fall within this period range, all of which were found by the DFSM.","hedge":{"p":1.0,"label":"asserted"},"own_p":0.95,"main_claim_p":0.06,"quantitative":true,"quantitative_p":0.98,"role_probabilities":{"gap":0.0,"method":0.0,"result":0.99,"background":0.0,"limitation":0.0,"future_work":0.0,"contribution":0.0,"interpretation":0.01}},{"i":5,"p":0.97,"id":"s5","own":true,"role":"result","text":"The DFSM also found an additional pulsar that had been missed during the inspection of the FFT candidates.","hedge":{"p":1.0,"label":"asserted"},"own_p":0.95,"main_claim_p":0.05,"quantitative":false,"quantitative_p":0.46,"role_probabilities":{"gap":0.0,"method":0.0,"result":0.97,"background":0.0,"limitation":0.0,"future_work":0.0,"contribution":0.03,"interpretation":0.0}},{"i":6,"p":1.0,"id":"s6","own":true,"role":"result","text":"Most of the new discoveries are canonical pulsars, with spin periods ranging from 299 ms to 4.4 s and dispersion measures from 10 to 192 $\\rm pc \\, cm^{-3}$.","hedge":{"p":1.0,"label":"asserted"},"own_p":0.95,"main_claim_p":0.12,"quantitative":true,"quantitative_p":0.99,"role_probabilities":{"gap":0.0,"method":0.0,"result":1.0,"background":0.0,"limitation":0.0,"future_work":0.0,"contribution":0.0,"interpretation":0.0}},{"i":7,"p":1.0,"id":"s7","own":true,"role":"result","text":"We also found a binary millisecond pulsar with a spin period of 3.2 ms in a 4.5-d orbit.","hedge":{"p":1.0,"label":"asserted"},"own_p":0.97,"main_claim_p":0.05,"quantitative":true,"quantitative_p":0.98,"role_probabilities":{"gap":0.0,"method":0.0,"result":1.0,"background":0.0,"limitation":0.0,"future_work":0.0,"contribution":0.0,"interpretation":0.0}},{"i":8,"p":1.0,"id":"s8","own":true,"role":"result","text":"We redetected 855 pulsars in the data, 825 of which were found in the FFT search.","hedge":{"p":1.0,"label":"asserted"},"own_p":0.96,"main_claim_p":0.07,"quantitative":true,"quantitative_p":0.99,"role_probabilities":{"gap":0.0,"method":0.0,"result":1.0,"background":0.0,"limitation":0.0,"future_work":0.0,"contribution":0.0,"interpretation":0.0}},{"i":9,"p":0.97,"id":"s9","own":true,"role":"result","text":"Within the effective parameter space of our periodicity search, the FFT search recovered $\\sim$98 % of the known pulsars within the survey sensitivity limits.","hedge":{"p":1.0,"label":"asserted"},"own_p":0.95,"main_claim_p":0.11,"quantitative":true,"quantitative_p":0.99,"role_probabilities":{"gap":0.0,"method":0.0,"result":0.97,"background":0.0,"limitation":0.0,"future_work":0.0,"contribution":0.0,"interpretation":0.03}},{"i":10,"p":0.97,"id":"s10","own":true,"role":"result","text":"After accounting for previously reported pulsars whose observations were not processed or whose parameters lay outside our search range, the updated GBNCC census now includes 964 pulsars.","hedge":{"p":1.0,"label":"asserted"},"own_p":0.85,"main_claim_p":0.27,"quantitative":true,"quantitative_p":0.99,"role_probabilities":{"gap":0.0,"method":0.0,"result":0.97,"background":0.0,"limitation":0.0,"future_work":0.0,"contribution":0.03,"interpretation":0.0}}]},"compiled":{"main_claim":{"p":0.78,"text":"From the 60 promising candidates identified in this search, we confirmed 51 new pulsars using the Green bank and CHIME.","location":"abstract 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