BibTex format
@article{Agazie:2025:1538-4357/ad93aa,
author = {Agazie, G and Anumarlapudi, A and Archibald, AM and Arzoumanian, Z and Baier, JG and Baker, PT and Bécsy, B and Blecha, L and Brazier, A and Brook, PR and Burke-Spolaor, S and Casey-Clyde, JA and Charisi, M and Chatterjee, S and Cohen, T and Cordes, JM and Cornish, NJ and Crawford, F and Cromartie, HT and Crowter, K and DeCesar, ME and Demorest, PB and Deng, H and Dey, L and Dolch, T and Ferrara, EC and Fiore, W and Fonseca, E and Freedman, GE and Gardiner, EC and Garver-Daniels, N and Gentile, PA and Gersbach, KA and Glaser, J and Good, DC and Guertin, L and Gültekin, K and Hazboun, JS and Jennings, RJ and Johnson, AD and Jones, ML and Kaiser, AR and Kaplan, DL and Kelley, LZ and Kerr, M and Key, JS and Laal, N and Lam, MT and Lamb, WG and Larsen, B and Lazio, TJW and Lewandowska, N and Liu, T and Lorimer, DR and Luo, J and Lynch, RS and Ma, CP and Madison, DR and McEwen, A and McKee, JW and McLaughlin, MA and McMann, N and Meyers, BW and Meyers, PM and Middleton, H and Mingarelli, CM},
doi = {1538-4357/ad93aa},
journal = {Astrophysical Journal},
title = {The NANOGrav 15 Yr Data Set: Removing Pulsars One by One from the Pulsar Timing Array},
url = {http://dx.doi.org/10.3847/1538-4357/ad93aa},
volume = {978},
year = {2025}
}
RIS format (EndNote, RefMan)
TY - JOUR
AB - Evidence has emerged for a stochastic signal correlated among 67 pulsars within the 15 yr pulsar-timing data set compiled by the NANOGrav collaboration. Similar signals have been found in data from the European, Indian, Parkes, and Chinese pulsar timing arrays. This signal has been interpreted as indicative of the presence of a nanohertz stochastic gravitational-wave background (GWB). To explore the internal consistency of this result, we investigate how the recovered signal strength changes as we remove the pulsars one by one from the data set. We calculate the signal strength using the (noise-marginalized) optimal statistic, a frequentist metric designed to measure the correlated excess power in the residuals of the arrival times of the radio pulses. We identify several features emerging from this analysis that were initially unexpected. The significance of these features, however, can only be assessed by comparing the real data to synthetic data sets. After conducting identical analyses on simulated data sets, we do not find anything inconsistent with the presence of a stochastic GWB in the NANOGrav 15 yr data. The methodologies developed here can offer additional tools for application to future, more sensitive data sets. While this analysis provides an internal consistency check of the NANOGrav results, it does not eliminate the necessity for additional investigations that could identify potential systematics or uncover unmodeled physical phenomena in the data.
AU - Agazie,G
AU - Anumarlapudi,A
AU - Archibald,AM
AU - Arzoumanian,Z
AU - Baier,JG
AU - Baker,PT
AU - Bécsy,B
AU - Blecha,L
AU - Brazier,A
AU - Brook,PR
AU - Burke-Spolaor,S
AU - Casey-Clyde,JA
AU - Charisi,M
AU - Chatterjee,S
AU - Cohen,T
AU - Cordes,JM
AU - Cornish,NJ
AU - Crawford,F
AU - Cromartie,HT
AU - Crowter,K
AU - DeCesar,ME
AU - Demorest,PB
AU - Deng,H
AU - Dey,L
AU - Dolch,T
AU - Ferrara,EC
AU - Fiore,W
AU - Fonseca,E
AU - Freedman,GE
AU - Gardiner,EC
AU - Garver-Daniels,N
AU - Gentile,PA
AU - Gersbach,KA
AU - Glaser,J
AU - Good,DC
AU - Guertin,L
AU - Gültekin,K
AU - Hazboun,JS
AU - Jennings,RJ
AU - Johnson,AD
AU - Jones,ML
AU - Kaiser,AR
AU - Kaplan,DL
AU - Kelley,LZ
AU - Kerr,M
AU - Key,JS
AU - Laal,N
AU - Lam,MT
AU - Lamb,WG
AU - Larsen,B
AU - Lazio,TJW
AU - Lewandowska,N
AU - Liu,T
AU - Lorimer,DR
AU - Luo,J
AU - Lynch,RS
AU - Ma,CP
AU - Madison,DR
AU - McEwen,A
AU - McKee,JW
AU - McLaughlin,MA
AU - McMann,N
AU - Meyers,BW
AU - Meyers,PM
AU - Middleton,H
AU - Mingarelli,CMF
AU - Mitridate,A
AU - Moore,CJ
AU - Ng,C
AU - Nice,DJ
AU - Ocker,SK
AU - Olum,KD
AU - Pennucci,TT
AU - Perera,BBP
AU - Pol,NS
AU - Radovan,HA
AU - Ransom,SM
AU - Ray,PS
AU - Romano,JD
AU - Runnoe,JC
AU - Saffer,A
AU - Sardesai,SC
AU - Schmiedekamp,A
AU - Schmiedekamp,C
AU - Schmitz,K
AU - Shapiro-Albert,BJ
AU - Siemens,X
AU - Simon,J
AU - Siwek,MS
AU - Sosa,Fiscella SV
AU - Stairs,IH
AU - Stinebring,DR
AU - Stovall,K
AU - Susobhanan,A
AU - Swiggum,JK
AU - Taylor,SR
AU - Turner,JE
AU - Unal,C
AU - Vallisneri,M
AU - Vecchio,A
DO - 1538-4357/ad93aa
PY - 2025///
SN - 0004-637X
TI - The NANOGrav 15 Yr Data Set: Removing Pulsars One by One from the Pulsar Timing Array
T2 - Astrophysical Journal
UR - http://dx.doi.org/10.3847/1538-4357/ad93aa
VL - 978
ER -