\begin{thebibliography}{10}
\newcommand{\enquote}[1]{``#1''}

\bibitem{Davis1996}
C.~C. Davis, \emph{Lasers and electro-optics} (Cambridge university press,
  1996).

\bibitem{Planck1900}
M.~Planck, \enquote{{\"U}ber irreversible strahlungsvorgänge,}
  {\protect\JournalTitle{Ann. Phys.}} \textbf{306}, 69--122 (1900).

\bibitem{Einstein1905}
A.~Einstein, \enquote{{Einstein's Proposal of the Photon Concept—a
  Translation of the Annalen der Physik Paper of 1905},}
  {\protect\JournalTitle{Am. J. Phys.}} \textbf{33}, 367--374 (1965).

\bibitem{Glauber1963_PhotonCorrelations}
R.~J. Glauber, \enquote{Photon correlations,} {\protect\JournalTitle{Phys. Rev.
  Lett.}} \textbf{10}, 84--86 (1963).

\bibitem{Loudon2000}
R.~Loudon, \emph{The Quantum Theory of Light} (Oxford, UK, 2000).

\bibitem{PK2016}
P.~K. Tan, A.~H. Chan, and C.~Kurtsiefer, \enquote{{Optical intensity
  interferometry through atmospheric turbulence},}
  {\protect\JournalTitle{MNRAS}} \textbf{457}, 4291--4295 (2016).

\bibitem{Deng2019}
Y.~Deng, H.~Wang, X.~Ding, \emph{et~al.}, \enquote{Quantum interference between
  light sources separated by 150 million kilometers,}
  {\protect\JournalTitle{Phys. Rev. Lett.}} \textbf{123}, 080401 (2019).

\bibitem{Rebka1957}
R.~V. Rebka, G. A.and~Pound, \enquote{Time-correlated photons,}
  {\protect\JournalTitle{Nature}} \textbf{180}, 1035--1036 (1957).

\bibitem{HBT1958}
R.~H. Brown and R.~Twiss, \enquote{Interferometry of the intensity fluctuations
  in light. ii. an experimental test of the theory for partially coherent
  light,} {\protect\JournalTitle{Proc. R. Soc. Lond.}} \textbf{243}, 291--319
  (1958).

\bibitem{Morgan1966}
B.~L. Morgan and L.~Mandel, \enquote{Measurement of photon bunching in a
  thermal light beam,} {\protect\JournalTitle{Phys. Rev. Lett.}} \textbf{16},
  1012--1015 (1966).

\bibitem{Scarl1968}
D.~B. Scarl, \enquote{Measurements of photon correlations in partially coherent
  light,} {\protect\JournalTitle{Phys. Rev.}} \textbf{175}, 1661--1668 (1968).

\bibitem{HBT1954}
R.~H. Brown and R.~Q. Twiss, \enquote{Lxxiv. a new type of interferometer for
  use in radio astronomy,} {\protect\JournalTitle{Lond. Edinb. Dublin philos.
  mag. j. sci.}} \textbf{45}, 663--682 (1954).

\bibitem{HBT1956}
R.~H. Brown and R.~Q. Twiss, \enquote{Correlation between photons in two
  coherent beams of light,} {\protect\JournalTitle{Nature}} \textbf{177},
  27--29 (1956).

\bibitem{Glauber1963_QuantumTheory}
R.~J. Glauber, \enquote{The quantum theory of optical coherence,}
  {\protect\JournalTitle{Phys. Rev.}} \textbf{130}, 2529--2539 (1963).

\bibitem{MandelWolf1995}
L.~Mandel and E.~Wolf, \emph{Optical coherence and quantum optics} (Cambridge
  university press, 1995).

\bibitem{Fox2006}
M.~Fox, \emph{Quantum optics: An Introduction}, Oxford Master Series in Physics
  (OUP Oxford, 2006).

\bibitem{Glauber1963}
R.~J. Glauber, \enquote{Photon correlations,} {\protect\JournalTitle{Phys. Rev.
  Lett.}} \textbf{10}, 84--86 (1963).

\bibitem{MS1964}
W.~Martienssen and E.~Spiller, \enquote{{Coherence and Fluctuations in Light
  Beams},} {\protect\JournalTitle{Am. J. Phys.}} \textbf{32}, 919--926 (1964).

\bibitem{Arecchi1965}
F.~Arecchi and R.~Bonifacio, \enquote{Theory of optical maser amplifiers,}
  {\protect\JournalTitle{IEEE J. Quantum Electron.}} \textbf{1}, 169--178
  (1965).

\bibitem{Gonsiorowski1983}
T.~Gonsiorowski and J.~C. Dainty, \enquote{Correlation properties of light
  produced by quasi-thermal sources,} {\protect\JournalTitle{J. Opt. Soc. Am.}}
  \textbf{73}, 234--237 (1983).

\bibitem{Scarcelli2004}
G.~Scarcelli, A.~Valencia, and Y.~Shih, \enquote{Experimental study of the
  momentum correlation of a pseudothermal field in the photon-counting regime,}
  {\protect\JournalTitle{Phys. Rev. A}} \textbf{70}, 051802 (2004).

\bibitem{Valencia2005}
A.~Valencia, G.~Scarcelli, M.~D'Angelo, and Y.~Shih, \enquote{Two-photon
  imaging with thermal light,} {\protect\JournalTitle{Phys. Rev. Lett.}}
  \textbf{94}, 063601 (2005).

\bibitem{Zhou2017}
Y.~Zhou, F.~Li, B.~Bai, \emph{et~al.}, \enquote{Superbunching pseudothermal
  light,} {\protect\JournalTitle{Phys. Rev. A}} \textbf{95}, 053809 (2017).

\bibitem{Arecchi1967}
F.~T. Arecchi, M.~Giglio, and U.~Tartari, \enquote{Scattering of coherent light
  by a statistical medium,} {\protect\JournalTitle{Phys. Rev.}} \textbf{163},
  186--194 (1967).

\bibitem{Pecora1985}
R.~Pecora, \emph{Dynamic light scattering: applications of photon correlation
  spectroscopy} (Springer Science \& Business Media, 1985).

\bibitem{Dravins2015}
D.~Dravins, T.~Lagadec, and P.~D. Nu{\~n}ez, \enquote{Optical aperture
  synthesis with electronically connected telescopes,}
  {\protect\JournalTitle{Nat. Commun.}} \textbf{6}, 6852 (2015).

\bibitem{PK2017}
P.~K. Tan and C.~Kurtsiefer, \enquote{{Temporal intensity interferometry for
  characterization of very narrow spectral lines},}
  {\protect\JournalTitle{MNRAS}} \textbf{469}, 1617--1621 (2017).

\bibitem{Estes1971}
L.~E. Estes, M.~Narducci, and R.~A. Tuft, \enquote{Scattering of light from a
  rotating ground glass$\ast$,} {\protect\JournalTitle{J. Opt. Soc. Am.}}
  \textbf{61}, 1301--1306 (1971).

\bibitem{Jakeman1975}
E.~Jakeman, \enquote{The effect of wavefront curvature on the coherence
  properties of laser light scattered by target centres in uniform motion,}
  {\protect\JournalTitle{J. Phys. A}} \textbf{8}, L23 (1975).

\bibitem{Pusey1976}
P.~N. Pusey, \enquote{Photon correlation study of laser speckle produced by a
  moving rough surface,} {\protect\JournalTitle{J. Phys. D}} \textbf{9},
  1399--1409 (1976).

\bibitem{Kuusela2017}
T.~A. Kuusela, \enquote{Measurement of the second-order coherence of
  pseudothermal light,} {\protect\JournalTitle{Am. J. Phys.}} \textbf{85},
  289--294 (2017).

\bibitem{Siegert1943}
A.~J.~F. Siegert, \emph{On the Fluctuations in Signals Returned by Many
  Independently Moving Scatterers}, Radiation Laboratory, Massachusetts
  Institute of Technology (1943).

\bibitem{Pike1974}
H.~Z. Cummins and E.~R. Pike, \emph{Photon correlation and light beating
  spectroscopy} (Springer Science+Business Media, 1974).

\bibitem{Jakeman1980}
E.~Jakeman, \enquote{On the statistics of k-distributed noise,}
  {\protect\JournalTitle{Journal of Physics A: Mathematical and General}}
  \textbf{13}, 31 (1980).

\bibitem{Lemieux1999}
P.-A. Lemieux and D.~J. Durian, \enquote{Investigating non-gaussian scattering
  processes by using nth-order intensity correlation functions,}
  {\protect\JournalTitle{J. Opt. Soc. Am. A}} \textbf{16}, 1651--1664 (1999).

\bibitem{Ferreira2020}
D.~Ferreira, R.~Bachelard, W.~Guerin, \emph{et~al.}, \enquote{Connecting field
  and intensity correlations: The siegert relation and how to test it,}
  {\protect\JournalTitle{Am. J. Phys.}} \textbf{88}, 831--837 (2020).

\bibitem{Las2022}
P.~Lass{\`e}gues, M.~A.~F. Biscassi, M.~Morisse, \emph{et~al.}, \enquote{Field
  and intensity correlations: the siegert relation from stars to quantum
  emitters,} {\protect\JournalTitle{Eur. Phys. J. D}} \textbf{76}, 246 (2022).

\bibitem{lebreton2013exp}
A.~Lebreton, I.~Abram, R.~Braive, \emph{et~al.}, \enquote{Unequivocal
  differentiation of coherent and chaotic light through interferometric photon
  correlation measurements,} {\protect\JournalTitle{Phys. Rev. Lett.}}
  \textbf{110}, 163603 (2013).

\bibitem{XJ2023}
X.~J. Yeo, E.~Ernst, A.~Leow, \emph{et~al.}, \enquote{Direct measurement of the
  coherent light proportion from a practical laser source,}
  {\protect\JournalTitle{Phys. Rev. A}} \textbf{109}, 013706 (2024).

\end{thebibliography}