GollumFit: An icecube open-source framework for binned-likelihood neutrino telescope analyses
Journal article, 2026
We present GollumFit, a framework designed for performing binned-likelihood analyses on neutrino telescope data. GollumFit incorporates model parameters common to any neutrino telescope and also model parameters specific to the IceCube Neutrino Observatory. We provide a high-level overview of its key features and how the code is organized. We then discuss the performance of the fitting in a typical analysis scenario, highlighting the ability to fit over tens of nuisance parameters. We present some examples showing how to use the package for likelihood minimization tasks. This framework uniquely incorporates the particular model parameters necessary for neutrino telescopes, and solves an associated likelihood problem in a time-efficient manner.
Neutrino telescope
Analysis framework
Binned likelihood
Author
R. Abbasi
Loyola University of Chicago
M. Ackermann
Deutsches Elektronen-Synchrotron (DESY)
J. Adams
University of Canterbury
S. K. Agarwalla
Institute of Physics Bhubaneswar
University of Wisconsin
University of Wisconsin Madison
J. A. Aguilar
Université libre de Bruxelles (ULB)
M. Ahlers
University of Copenhagen
J. M. Alameddine
Technische Universität Dortmund
N. M. Amin
University of Delaware
K. Andeen
Marquette University
C. Arguelles
Harvard University
Y. Ashida
University of Utah
S. Athanasiadou
Deutsches Elektronen-Synchrotron (DESY)
S. N. Axani
University of Delaware
R. Babu
Michigan State University
X. Bai
South Dakota School of Mines & Technology
Balagopal
University of Wisconsin Madison
Karlsruhe Institute of Technology (KIT)
University of Wisconsin
M. Baricevic
University of Wisconsin
University of Wisconsin Madison
S. W. Barwick
University of California
S. Bash
Technical University of Munich
V. Basu
University of Utah
R. Bay
University of California
J. J. Beatty
Ohio State University
J. Becker Tjus
P. Behrens
RWTH Aachen University
J. Beise
Uppsala University
C. Bellenghi
Technical University of Munich
B. Benkel
Deutsches Elektronen-Synchrotron (DESY)
S. BenZvi
University of Rochester
D. Berley
University of Maryland
E. Bernardini
University of Padua
National Institute for Nuclear Physics
D. Z. Besson
University of Kansas
E. Blaufuss
University of Maryland
L. Bloom
University of Alabama
S. Blot
Deutsches Elektronen-Synchrotron (DESY)
F. Bontempo
Karlsruhe Institute of Technology (KIT)
J. Y. Book Motzkin
Harvard University
C. Boscolo Meneguolo
National Institute for Nuclear Physics
University of Padua
S. Boser
Johannes Gutenberg University Mainz
O. Botner
Uppsala University
J. Bottcher
RWTH Aachen University
J. Braun
University of Wisconsin
University of Wisconsin Madison
B. Brinson
Georgia Institute of Technology
Z. Brisson-Tsavoussis
Queen's University
R. T. Burley
University of Adelaide
D. Butterfield
University of Wisconsin Madison
University of Wisconsin
M. A. Campana
Drexel University
K. Carloni
Harvard University
J. Carpio
University of Nevada, Las Vegas
S. Chattopadhyay
University of Wisconsin Madison
University of Wisconsin
Institute of Physics Bhubaneswar
N. Chau
Université libre de Bruxelles (ULB)
Z. Chen
State University of New York
D. Chirkin
University of Wisconsin
University of Wisconsin Madison
B. A. Clark
University of Maryland
A. Coleman
Karlsruhe Institute of Technology (KIT)
Uppsala University
P. Coleman
RWTH Aachen University
G. H. Collin
Massachusetts Institute of Technology (MIT)
A. Connolly
Ohio State University
J. M. Conrad
Massachusetts Institute of Technology (MIT)
R. Corley
University of Utah
D. F. Cowen
Pennsylvania State University
C. De Clercq
Vrije Universiteit Brussel (VUB)
J. J. DeLaunay
Pennsylvania State University
D. Delgado
Harvard University
T. Delmeulle
Université libre de Bruxelles (ULB)
S. Deng
RWTH Aachen University
A. Desai
University of Wisconsin Madison
University of Wisconsin
P. Desiati
University of Wisconsin Madison
University of Wisconsin
K. D. de Vries
Vrije Universiteit Brussel (VUB)
G. De Wasseige
Universite catholique de Louvain
T. DeYoung
Michigan State University
J. C. Diaz-Velez
University of Wisconsin Madison
University of Wisconsin
A. Diaz
Massachusetts Institute of Technology (MIT)
S. DiKerby
Michigan State University
M. Dittmer
University of Münster
A. Domi
University of Erlangen-Nuremberg (FAU)
L. Draper
University of Utah
L. Dueser
RWTH Aachen University
H. Dujmovic
University of Wisconsin
University of Wisconsin Madison
D. Durnford
University of Alberta
K. Dutta
Johannes Gutenberg University Mainz
M. A. DuVernois
University of Wisconsin Madison
University of Wisconsin
T. Ehrhardt
Johannes Gutenberg University Mainz
L. Eidenschink
Technical University of Munich
A. Eimer
University of Erlangen-Nuremberg (FAU)
P. Eller
Technical University of Munich
E. Ellinger
Bergische Universität Wuppertal
D. Elsasser
Technische Universität Dortmund
R. Engel
Karlsruhe Institute of Technology (KIT)
H. Erpenbeck
University of Wisconsin
University of Wisconsin Madison
W. Esmail
University of Münster
J. Evans
University of Maryland
P. A. Evenson
University of Delaware
K. L. Fan
University of Maryland
K. Fang
University of Wisconsin Madison
University of Wisconsin
K. Farrag
Chiba University
A. R. Fazely
Southern University and A&M College
A. Fedynitch
Academia Sinica
N. Feigl
Humboldt University of Berlin
C. Finley
Stockholm University
L. Fischer
Deutsches Elektronen-Synchrotron (DESY)
D. Fox
Pennsylvania State University
A. Franckowiak
Ruhr-Universität Bochum
S. Fukami
Deutsches Elektronen-Synchrotron (DESY)
P. Furst
RWTH Aachen University
J. Gallagher
University of Wisconsin Madison
E. Ganster
RWTH Aachen University
A. Garcia
Harvard University
M. Garcia
University of Delaware
G. Garg
University of Wisconsin Madison
Institute of Physics Bhubaneswar
University of Wisconsin
E. Genton
Harvard University
Universite catholique de Louvain
L. Gerhardt
Lawrence Berkeley National Laboratory
A. Ghadimi
University of Alabama
C. Glaser
Uppsala University
T. Glusenkamp
Uppsala University
J. G. Gonzalez
University of Delaware
S. Goswami
University of Nevada, Las Vegas
A. Granados
Michigan State University
D. Grant
Simon Fraser University
S. J. Gray
University of Maryland
S. Griffin
University of Wisconsin
University of Wisconsin Madison
S. Griswold
University of Rochester
K. M. Groth
University of Copenhagen
D. Guevel
University of Wisconsin
University of Wisconsin Madison
C. Gunther
RWTH Aachen University
P. Gutjahr
Technische Universität Dortmund
C. Ha
Chung-Ang University
C. Haack
University of Erlangen-Nuremberg (FAU)
A. Hallgren
Uppsala University
L. Halve
RWTH Aachen University
F. Halzen
University of Wisconsin Madison
University of Wisconsin
L. Hamacher
RWTH Aachen University
M. Ha Minh
Technical University of Munich
M. Handt
RWTH Aachen University
K. Hanson
University of Wisconsin Madison
University of Wisconsin
J. Hardin
Massachusetts Institute of Technology (MIT)
A. A. Harnisch
Michigan State University
P. Hatch
Queen's University
A. Haungs
Karlsruhe Institute of Technology (KIT)
J. Haussler
RWTH Aachen University
K. Helbing
Bergische Universität Wuppertal
J. Hellrung
Ruhr-Universität Bochum
L. Hennig
University of Erlangen-Nuremberg (FAU)
L. Heuermann
RWTH Aachen University
R. Hewett
University of Canterbury
N. Heyer
Uppsala University
S. Hickford
Bergische Universität Wuppertal
A. Hidvegi
Stockholm University
C. Hill
Chiba University
G. C. Hill
University of Adelaide
R. Hmaid
Chiba University
K. D. Hoffman
University of Maryland
S. Hori
University of Wisconsin Madison
University of Wisconsin
K. Hoshina
University of Wisconsin Madison
University of Tokyo
University of Wisconsin
M. Hostert
Harvard University
W. Hou
Karlsruhe Institute of Technology (KIT)
T. Huber
Karlsruhe Institute of Technology (KIT)
K. Hultqvist
Stockholm University
R. Hussain
University of Wisconsin Madison
University of Wisconsin
K. Hymon
Academia Sinica
Technische Universität Dortmund
A. Ishihara
Chiba University
W. Iwakiri
Chiba University
M. Jacquart
University of Wisconsin Madison
University of Wisconsin
S. Jain
University of Wisconsin Madison
University of Wisconsin
O. Janik
University of Erlangen-Nuremberg (FAU)
M. Jeong
University of Utah
M. Jin
Harvard University
B. J. P. Jones
University of Texas
N. Kamp
Harvard University
D. Kang
Karlsruhe Institute of Technology (KIT)
X. Kang
Drexel University
A. Kappes
University of Münster
L. Kardum
Technische Universität Dortmund
T. Karg
Deutsches Elektronen-Synchrotron (DESY)
M. Karl
Technical University of Munich
A. Karle
University of Wisconsin
University of Wisconsin Madison
A. Katil
University of Alberta
M. Kauer
University of Wisconsin Madison
University of Wisconsin
J. L. Kelley
University of Wisconsin
University of Wisconsin Madison
M. Khanal
University of Utah
A. Khatee Zathul
University of Wisconsin Madison
University of Wisconsin
A. Kheirandish
University of Nevada, Las Vegas
H. Kimku
Chung-Ang University
J. Kiryluk
State University of New York
C. Klein
University of Erlangen-Nuremberg (FAU)
S. R. Klein
Lawrence Berkeley National Laboratory
University of California
Y. Kobayashi
Chiba University
A. Kochocki
Michigan State University
R. Koirala
University of Delaware
H. Kolanoski
Humboldt University of Berlin
T. Kontrimas
Technical University of Munich
L. Kopke
Johannes Gutenberg University Mainz
C. Kopper
University of Erlangen-Nuremberg (FAU)
D. J. Koskinen
University of Copenhagen
P. Koundal
University of Delaware
M. Kowalski
Humboldt University of Berlin
Deutsches Elektronen-Synchrotron (DESY)
T. Kozynets
University of Copenhagen
N. Krieger
Ruhr-Universität Bochum
J. Krishnamoorthi
University of Wisconsin Madison
Institute of Physics Bhubaneswar
University of Wisconsin
T. Krishnan
Harvard University
K. Kruiswijk
Universite catholique de Louvain
E. Krupczak
Michigan State University
A. Kumar
Deutsches Elektronen-Synchrotron (DESY)
E. Kun
Ruhr-Universität Bochum
N. Kurahashi
Drexel University
N. Lad
Deutsches Elektronen-Synchrotron (DESY)
C. Lagunas Gualda
Technical University of Munich
L. Lallement Arnaud
Université libre de Bruxelles (ULB)
M. Lamoureux
Universite catholique de Louvain
M. J. Larson
University of Maryland
F. Lauber
Bergische Universität Wuppertal
J. P. Lazar
Universite catholique de Louvain
K. Leonard DeHolton
Pennsylvania State University
A. Leszczynska
University of Delaware
J. Liao
Georgia Institute of Technology
Y. T. Liu
Pennsylvania State University
M. Liubarska
University of Alberta
C. Love
Drexel University
L. Lu
University of Wisconsin Madison
University of Wisconsin
F. Lucarelli
University of Geneva
W. Luszczak
Ohio State University
Y. Lyu
University of California
Lawrence Berkeley National Laboratory
J. Madsen
University of Wisconsin
University of Wisconsin Madison
E. Magnus
South Dakota School of Mines & Technology
K. B. M. Mahn
Michigan State University
Y. Makino
University of Wisconsin
University of Wisconsin Madison
E. Manao
Technical University of Munich
S. Mancina
National Institute for Nuclear Physics
University of Padua
A. Mand
University of Wisconsin
University of Wisconsin Madison
W. Marie Sainte
University of Wisconsin Madison
University of Wisconsin
I. C. Maris
Université libre de Bruxelles (ULB)
S. Marka
Columbia University
Z. Marka
Columbia University
L. Marten
RWTH Aachen University
I. Martinez-Soler
Harvard University
R. Maruyama
Yale University
F. Mayhew
Michigan State University
F. McNally
Mercer University
J. V. Mead
University of Copenhagen
K. Meagher
University of Wisconsin Madison
University of Wisconsin
S. Mechbal
Deutsches Elektronen-Synchrotron (DESY)
M. Meier
Chiba University
Y. Merckx
Vrije Universiteit Brussel (VUB)
L. Merten
Ruhr-Universität Bochum
J. Mitchell
Southern University and A&M College
L. Molchany
South Dakota School of Mines & Technology
T. Montaruli
University of Geneva
R. W. Moore
University of Alberta
Y. Morii
Chiba University
R. Morse
University of Wisconsin
University of Wisconsin Madison
A. Mosbrugger
University of Erlangen-Nuremberg (FAU)
M. Moulai
University of Wisconsin
University of Wisconsin Madison
D. Mousadi
Deutsches Elektronen-Synchrotron (DESY)
T. Mukherjee
Karlsruhe Institute of Technology (KIT)
R. Naab
Deutsches Elektronen-Synchrotron (DESY)
M. Nakos
University of Wisconsin Madison
University of Wisconsin
U. Naumann
Bergische Universität Wuppertal
J. Necker
Deutsches Elektronen-Synchrotron (DESY)
L. Neste
Stockholm University
M. Neumann
University of Münster
H. Niederhausen
Michigan State University
M. U. Nisa
Michigan State University
K. Noda
Chiba University
A. Noell
RWTH Aachen University
A. Novikov
University of Delaware
A. Obertacke Pollmann
Chiba University
V. O'Dell
University of Wisconsin Madison
University of Wisconsin
A. Olivas
University of Maryland
R. Orsoe
Technical University of Munich
J. Osborn
University of Wisconsin
University of Wisconsin Madison
E. O'Sullivan
Uppsala University
V. Palusova
Johannes Gutenberg University Mainz
H. Pandya
University of Delaware
A. Parenti
Université libre de Bruxelles (ULB)
N. Park
Queen's University
V. Parrish
Michigan State University
E. N. Paudel
University of Alabama
L. Paul
South Dakota School of Mines & Technology
C. Perez de los Heros
Uppsala University
T. Pernice
Deutsches Elektronen-Synchrotron (DESY)
J. Peterson
University of Wisconsin Madison
University of Wisconsin
A. Pizzuto
University of Wisconsin
University of Wisconsin Madison
M. Plum
South Dakota School of Mines & Technology
A. Ponten
Uppsala University
V. Poojyam
University of Alabama
Y. Popovych
Johannes Gutenberg University Mainz
M. Prado Rodriguez
University of Wisconsin
University of Wisconsin Madison
B. Pries
Michigan State University
R. Procter-Murphy
University of Maryland
G. T. Przybylski
Lawrence Berkeley National Laboratory
L. Pyras
University of Utah
C. Raab
Universite catholique de Louvain
J. Rack-Helleis
Johannes Gutenberg University Mainz
N. Rad
Deutsches Elektronen-Synchrotron (DESY)
M. Ravn
Uppsala University
K. Rawlins
University of Alaska Anchorage
Z. Rechav
University of Wisconsin Madison
University of Wisconsin
A. Rehman
University of Delaware
I. Reistroffer
South Dakota School of Mines & Technology
E. Resconi
Technical University of Munich
S. Reusch
Deutsches Elektronen-Synchrotron (DESY)
C. D. Rho
Sungkyunkwan University
W. Rhode
Technische Universität Dortmund
B. Riedel
University of Wisconsin
University of Wisconsin Madison
A. Rifaie
Bergische Universität Wuppertal
E. J. Roberts
University of Adelaide
S. Robertson
Lawrence Berkeley National Laboratory
University of California
M. Rongen
University of Erlangen-Nuremberg (FAU)
A. Rosted
Chiba University
C. Rott
University of Utah
T. Ruhe
Technische Universität Dortmund
L. Ruohan
Technical University of Munich
I. Safa
University of Wisconsin
University of Wisconsin Madison
J. Saffer
Karlsruhe Institute of Technology (KIT)
D. Salazar-Gallegos
Michigan State University
P. Sampathkumar
Karlsruhe Institute of Technology (KIT)
A. Sandrock
Bergische Universität Wuppertal
G. Sanger-Johnson
Michigan State University
M. Santander
University of Alabama
S. Sarkar
University of Oxford
J. Savelberg
RWTH Aachen University
P. Savina
University of Wisconsin Madison
University of Wisconsin
P. Schaile
Technical University of Munich
M. Schaufel
RWTH Aachen University
H. Schieler
Karlsruhe Institute of Technology (KIT)
S. Schindler
University of Erlangen-Nuremberg (FAU)
L. Schlickmann
Johannes Gutenberg University Mainz
A. Schneider
University of Wisconsin
University of Wisconsin Madison
B. Schluter
University of Münster
F. Schluter
Université libre de Bruxelles (ULB)
N. Schmeisser
Bergische Universität Wuppertal
T. Schmidt
University of Maryland
F. G. Schroder
University of Delaware
Karlsruhe Institute of Technology (KIT)
L. Schumacher
University of California
S. Schwirn
RWTH Aachen University
S. Sclafani
University of Maryland
D. Seckel
University of Delaware
L. Seen
University of Wisconsin Madison
University of Wisconsin
M. Seikh
University of Kansas
S. Seunarine
University of Wisconsin
P. A. Sevle Myhr
Universite catholique de Louvain
R. Shah
Drexel University
S. Shefali
Karlsruhe Institute of Technology (KIT)
N. Shimizu
Chiba University
M. Silva
University of Wisconsin Madison
University of Wisconsin
B. Skrzypek
University of California
R. Snihur
University of Wisconsin Madison
University of Wisconsin
J. Soedingrekso
Technische Universität Dortmund
A. Sogaard
University of Copenhagen
D. Soldin
University of Utah
P. Soldin
RWTH Aachen University
G. Sommani
Ruhr-Universität Bochum
C. Spannfellner
Technical University of Munich
G. M. Spiczak
University of Wisconsin
C. Spiering
Deutsches Elektronen-Synchrotron (DESY)
J. Stachurska
Ghent university
T. Stanev
University of Delaware
T. Stezelberger
Lawrence Berkeley National Laboratory
T. Sturwald
Bergische Universität Wuppertal
T. Stuttard
University of Copenhagen
G. W. Sullivan
University of Maryland
I. Taboada
Georgia Institute of Technology
S. Ter-Antonyan
Southern University and A&M College
A. Terliuk
Technical University of Munich
A. Thakuri
South Dakota School of Mines & Technology
M. Thiesmeyer
University of Wisconsin
University of Wisconsin Madison
W. G. Thompson
Harvard University
J. Thwaites
University of Wisconsin
University of Wisconsin Madison
S. Tilav
University of Delaware
K. Tollefson
Michigan State University
S. Toscano
Université libre de Bruxelles (ULB)
D. Tosi
University of Wisconsin
University of Wisconsin Madison
A. Trettin
Deutsches Elektronen-Synchrotron (DESY)
M. A. Unland Elorrieta
University of Münster
A. K. Upadhyay
University of Wisconsin
Institute of Physics Bhubaneswar
University of Wisconsin Madison
K. Upshaw
Southern University and A&M College
A. Vaidyanathan
Marquette University
N. Valtonen-Mattila
Ruhr-Universität Bochum
Uppsala University
J. Vandenbroucke
University of Wisconsin Madison
University of Wisconsin
T. Van Eeden
Deutsches Elektronen-Synchrotron (DESY)
N. van Eijndhoven
Vrije Universiteit Brussel (VUB)
J. van Santen
Deutsches Elektronen-Synchrotron (DESY)
J. Vara
University of Münster
F. Varsi
Karlsruhe Institute of Technology (KIT)
J. Veitch-Michaelis
University of Wisconsin Madison
University of Wisconsin
M. Venugopal
Karlsruhe Institute of Technology (KIT)
M. Vereecken
Universite catholique de Louvain
S. Vergara Carrasco
University of Canterbury
S. Verpoest
University of Delaware
D. Veske
Columbia University
A. Vijai
University of Maryland
J. Villarreal
Massachusetts Institute of Technology (MIT)
C. Walck
Stockholm University
N. Wandkowsky
University of Wisconsin
University of Wisconsin Madison
A. Wang
Georgia Institute of Technology
E. Warrick
University of Alabama
C. Weaver
Michigan State University
P. Weigel
Massachusetts Institute of Technology (MIT)
A. Weindl
Karlsruhe Institute of Technology (KIT)
A. Y. Wen
Harvard University
C. Wendt
University of Wisconsin Madison
University of Wisconsin
J. Werthebach
Technische Universität Dortmund
M. Weyrauch
Karlsruhe Institute of Technology (KIT)
N. Whitehorn
Michigan State University
C. H. Wiebusch
RWTH Aachen University
D. R. Williams
University of Alabama
L. Witthaus
Technische Universität Dortmund
M. Wolf
Technical University of Munich
G. Wrede
University of Erlangen-Nuremberg (FAU)
X. W. Xu
Southern University and A&M College
J. P. Yanez
University of Alberta
E. Yildizci
University of Wisconsin Madison
University of Wisconsin
S. Yoshida
Chiba University
R. Young
University of Kansas
F. Yu
Harvard University
S. Yu
University of Utah
T. Yuan
University of Wisconsin Madison
University of Wisconsin
A. Zegarelli
Ruhr-Universität Bochum
S. Zhang
Michigan State University
Z. Zhang
State University of New York
P. Zhelnin
Harvard University
P. Zilberman
University of Wisconsin Madison
University of Wisconsin
M. Zimmerman
University of Wisconsin
University of Wisconsin Madison
Computer Physics Communications
0010-4655 (ISSN)
Vol. 326 110195Subject Categories (SSIF 2025)
Astronomy, Astrophysics, and Cosmology
DOI
10.1016/j.cpc.2026.110195