Related papers: Probing the Galactic Diffuse Continuum Emission wi…

The cosipy library: COSI's high-level analysis software

The Compton Spectrometer and Imager (COSI) is a selected Small Explorer (SMEX) mission launching in 2027. It consists of a large field-of-view Compton telescope that will probe with increased sensitivity the under-explored MeV gamma-ray sky…

High Energy Astrophysical Phenomena · Physics 2023-08-23 Israel Martinez-Castellanos , Savitri Gallego , Chien-You Huang , Chris Karwin , Carolyn Kierans , Jan Peter Lommler , Saurabh Mittal , Michela Negro , Eliza Neights , Sean N. Pike , Yong Sheng , Thomas Siegert , Hiroki Yoneda , Andreas Zoglauer , John A. Tomsick , Steven E. Boggs , Dieter Hartmann , Marco Ajello , Eric Burns , Chris Fryer , Alexander Lowell , Julien Malzac , Jarred Roberts , Pascal Saint-Hilaire , Albert Shih , Clio Sleator , Tadayuki Takahashi , Fabrizio Tavecchio , Eric Wulf , Jacqueline Beechert , Hannah Gulick , Alyson Joens , Hadar Lazar , Juan Carlos Martinez Oliveros , Shigeki Matsumoto , Tom Melia , Mark Amman , Dhruv Bal , Peter von Ballmoos , Hugh Bates , Markus Böttcher , Andrea Bulgarelli , Elisabetta Cavazzuti , Hsiang-Kuang Chang , Claire Chen , Che-Yen Chu , Alex Ciabattoni , Luigi Costamante , Lente Dreyer , Valentina Fioretti , Francesco Fenu , Giancarlo Ghirlanda , Eric Grove , Pierre Jean , Nikita Khatiya , Jürgen Knödlseder , Martin Krause , Mark Leising , Tiffany R. Lewis , Lea Marcotulli , Samer Al Nussirat , Kazuhiro Nakazawa , Uwe Oberlack , David Palmore , Gabriele Panebianco , Nicolo Parmiggiani , Tyler Parsotan , Field Rogers , Hester Schutte , Alan P. Smale , Jacob Smith , Aaron Trigg , Tonia Venters , Yu Watanabe , Haocheng Zhang

The Compton Spectrometer and Imager

In this Astro2020 APC White Paper, we describe a Small Explorer (SMEX) mission concept called the Compton Spectrometer and Imager. COSI is a Compton telescope that covers the bandpass often referred to as the "MeV Gap" because it is the…

Instrumentation and Methods for Astrophysics · Physics 2019-08-14 John A. Tomsick , Andreas Zoglauer , Clio Sleator , Hadar Lazar , Jacqueline Beechert , Steven Boggs , Jarred Roberts , Thomas Siegert , Alex Lowell , Eric Wulf , Eric Grove , Bernard Phlips , Terri Brandt , Alan Smale , Carolyn Kierans , Eric Burns , Dieter Hartmann , Mark Leising , Marco Ajello , Chris Fryer , Mark Amman , Hsiang-Kuang Chang , Pierre Jean , Peter von Ballmoos

Puzzles of Galactic continuum gamma rays

Inverse Compton scattering appears to play a more important role in the diffuse Galactic continuum emission than previously thought, from MeV to GeV energies. We compare models having a large inverse Compton component with EGRET data, and…

Astrophysics · Physics 2007-05-23 I. V. Moskalenko , A. W. Strong

Gamma-ray continuum emission from the inner Galactic region as observed with INTEGRAL/SPI

The diffuse continuum emission from the Galactic plane in the energy range 18-1000 keV has been studied using 16 Ms of data from the SPI instrument on INTEGRAL. With such an exposure we can exploit the imaging properties of SPI to achieve a…

Astrophysics · Physics 2007-05-23 A. W. Strong , R. Diehl , H. Halloin , V. Schoenfelder , L. Bouchet , P. Mandrou , F. Lebrun , R. Terrier

Characterizing, correcting, and repairing the effects of radiation damage in the COSI germanium cross-strip detectors

The Compton Spectrometer and Imager (COSI) is a gamma-ray survey telescope utilizing a compact Compton imager design, enabled by an array of 16 high-resolution germanium cross-strip detectors. After its launch into an equatorial Low Earth…

Instrumentation and Methods for Astrophysics · Physics 2025-10-29 Steven E. Boggs , Sophia E. Haight , Sean N. Pike , Jarred Roberts , Albert Y. Shih , Joanna M. Szornel , John A. Tomsick , Andreas Zoglauer

Observation of Galactic center in the sub-MeV gamma-ray band with electron-tracking Compton camera

We report the direct detection of gamma-ray emission from the Galactic center in the 150-600 keV band using the electron-tracking Compton camera (ETCC), which has a wide field of view of 3.1 sr. This represents the first application of this…

High Energy Astrophysical Phenomena · Physics 2026-05-12 Tomonori Ikeda , Toru Tanimori , Atsushi Takada , Taito Takemura , Kei Yoshikawa , Yuta Nakamura , Ken Onozaka , Mitsuru Abe , Yoshitaka Mizumura

Diffuse Galactic continuum gamma rays

Galactic diffuse continuum gamma-ray emission is intricately related to cosmic-ray physics and radio astronomy. We describe recent results from an approach which endeavours to take advantage of this. Information from cosmic-ray composition…

Astrophysics · Physics 2010-12-13 A. W. Strong , I. V. Moskalenko , O. Reimer

Deciphering diffuse Galactic continuum gamma rays

Inverse Compton scattering appears to play a more important role in the diffuse Galactic continuum emission than previously thought, from MeV to GeV energies. We compare models having a large inverse Compton component with EGRET data, and…

Astrophysics · Physics 2007-05-23 I. V. Moskalenko , A. W. Strong

A Fresh Look at Diffuse Gamma-ray Emission from the Inner Galaxy

The Energetic Gamma-Ray Experiment Telescope (EGRET) experiment onboard the Compton Gamma-Ray Observatory (CGRO) has provided the most precise measurements of the gamma-ray sky to date. The EGRET measurements of the diffuse emission across…

Astrophysics · Physics 2007-06-05 B. M. Baughman , W. B. Atwood , R. P. Johnson , T. A. Porter , M. Ziegler

Diffuse Gamma Flux from Antiproton Annihilation in our Galaxy

The all-sky survey in high-energy gamma rays (E > 30 MeV) carried out by the Energetic Gamma Ray Experiment Telescope (EGRET) aboard the Compton Gamma-Ray Observatory provides a unique opportunity to examine in detail the diffuse gamma-ray…

Astrophysics · Physics 2011-04-15 Yu. A. Golubkov , M. Yu. Khlopov

Observation of Diffuse Cosmic and Atmospheric Gamma Rays at Balloon Altitudes with an Electron-tracking Compton Camera

We observed diffuse cosmic and atmospheric gamma rays at balloon altitudes with the Sub-MeV gamma-ray Imaging Loaded-on-balloon Experiment I (SMILE-I) as the first step toward a future all-sky survey with a high sensitivity. SMILE-I…

Instrumentation and Methods for Astrophysics · Physics 2015-03-19 Atsushi Takada , Hidetoshi Kubo , Hironobu Nishimura , Kazuki Ueno , Kaori Hattori , Shigeto Kabuki , Shunsuke Kurosawa , Kentaro Miuchi , Eiichi Mizuta , Tsutomu Nagayoshi , Naoki Nonaka , Yoko Okada , Reiko Orito , Hiroyuki Sekiya , Atsushi Takeda , Toru Tanimori

OSSE Observations of the Soft Gamma Ray Continuum from the Galactic Plane at Longitude 95 Degrees

We present the results of OSSE observations of the soft gamma ray continuum emission from the Galactic plane at longitude 95 degrees. Emission is detected between 50 and 600 keV where the spectrum is fit well by a power law with photon…

Astrophysics · Physics 2009-10-30 J. G. Skibo , W. N. Johnson , J. D. Kurfess , R. L. Kinzer , G. Jung , J. E. Grove , W. R. Purcell , M. P. Ulmer , N. Gehrels , J. Tueller

SPI Measurements of the Diffuse Galactic Hard X-ray Continuum

INTEGRAL Spectrometer SPI data from the first year of the Galactic Centre Deep Exposure has been analysed for the diffuse continuum from the Galactic ridge. A new catalogue of sources from the INTEGRAL Imager IBIS has been used to account…

Astrophysics · Physics 2007-05-23 A. W. Strong , R. Diehl , H. Halloin , V. Schoenfelder , L. Bouchet , P. Mandrou , B. J. Teegarden , F. Lebrun , R. Terrier

Far-Infrared [C II] Line Survey Observations of the Galactic Plane

We present results of our survey observations of the [C II] 158 micron line emission from the Galactic plane using the Balloon-borne Infrared Carbon Explorer (BICE). Our survey covers a wide area (350 deg < l < 25 deg, |b| < 3 deg) with a…

Astrophysics · Physics 2009-10-30 Takao Nakagawa , Yukari Yamashita Yui , Yasuo Doi , Haruyuki Okuda , Hiroshi Shibai , Kenji Mochizuki , Tetsuo Nishimura , Frank J. Low

Measurement of ultra-high-energy diffuse gamma-ray emission of the Galactic plane from 10 TeV to 1 PeV with LHAASO-KM2A

The diffuse Galactic $\gamma$-ray emission, mainly produced via interactions between cosmic rays and the interstellar medium and/or radiation field, is a very important probe of the distribution, propagation, and interaction of cosmic rays…

High Energy Astrophysical Phenomena · Physics 2024-03-11 Zhen Cao , F. Aharonian , Q. An , Axikegu , Y. X. Bai , Y. W. Bao , D. Bastieri , X. J. Bi , Y. J. Bi , J. T. Cai , Q. Cao , W. Y. Cao , Zhe Cao , J. Chang , J. F. Chang , A. M. Chen , E. S. Chen , Liang Chen , Lin Chen , Long Chen , M. J. Chen , M. L. Chen , Q. H. Chen , S. H. Chen , S. Z. Chen , T. L. Chen , Y. Chen , N. Cheng , Y. D. Cheng , M. Y. Cui , S. W. Cui , X. H. Cui , Y. D. Cui , B. Z. Dai , H. L. Dai , Z. G. Dai , Danzengluobu , D. della Volpe , X. Q. Dong , K. K. Duan , J. H. Fan , Y. Z. Fan , J. Fang , K. Fang , C. F. Feng , L. Feng , S. H. Feng , X. T. Feng , Y. L. Feng , S. Gabici , B. Gao , C. D. Gao , L. Q. Gao , Q. Gao , W. Gao , W. K. Gao , M. M. Ge , L. S. Geng , G. Giacinti , G. H. Gong , Q. B. Gou , M. H. Gu , F. L. Guo , X. L. Guo , Y. Q. Guo , Y. Y. Guo , Y. A. Han , H. H. He , H. N. He , J. Y. He , X. B. He , Y. He , M. Heller , Y. K. Hor , B. W. Hou , C. Hou , X. Hou , H. B. Hu , Q. Hu , S. C. Hu , D. H. Huang , T. Q. Huang , W. J. Huang , X. T. Huang , X. Y. Huang , Y. Huang , Z. C. Huang , X. L. Ji , H. Y. Jia , K. Jia , K. Jiang , X. W. Jiang , Z. J. Jiang , M. Jin , M. M. Kang , T. Ke , D. Kuleshov , K. Kurinov , B. B. Li , Cheng Li , Cong Li , D. Li , F. Li , H. B. Li , H. C. Li , H. Y. Li , J. Li , Jian Li , Jie Li , K. Li , W. L. Li , W. L. Li , X. R. Li , Xin Li , Y. Z. Li , Zhe Li , Zhuo Li , E. W. Liang , Y. F. Liang , S. J. Lin , B. Liu , C. Liu , D. Liu , H. Liu , H. D. Liu , J. Liu , J. L. Liu , J. Y. Liu , M. Y. Liu , R. Y. Liu , S. M. Liu , W. Liu , Y. Liu , Y. N. Liu , R. Lu , Q. Luo , H. K. Lv , B. Q. Ma , L. L. Ma , X. H. Ma , J. R. Mao , Z. Min , W. Mitthumsiri , H. J. Mu , Y. C. Nan , A. Neronov , Z. W. Ou , B. Y. Pang , P. Pattarakijwanich , Z. Y. Pei , M. Y. Qi , Y. Q. Qi , B. Q. Qiao , J. J. Qin , D. Ruffolo , A. Saiz , D. Semikoz , C. Y. Shao , L. Shao , O. Shchegolev , X. D. Sheng , F. W. Shu , H. C. Song , Yu. V. Stenkin , V. Stepanov , Y. Su , Q. N. Sun , X. N. Sun , Z. B. Sun , P. H. T. Tam , Q. W. Tang , Z. B. Tang , W. W. Tian , C. Wang , C. B. Wang , G. W. Wang , H. G. Wang , H. H. Wang , J. C. Wang , K. Wang , L. P. Wang , L. Y. Wang , P. H. Wang , R. Wang , W. Wang , X. G. Wang , X. Y. Wang , Y. Wang , Y. D. Wang , Y. J. Wang , Z. H. Wang , Z. X. Wang , Zhen Wang , Zheng Wang , D. M. Wei , J. J. Wei , Y. J. Wei , T. Wen , C. Y. Wu , H. R. Wu , S. Wu , X. F. Wu , Y. S. Wu , S. Q. Xi , J. Xia , J. J. Xia , G. M. Xiang , D. X. Xiao , G. Xiao , G. G. Xin , Y. L. Xin , Y. Xing , Z. Xiong , D. L. Xu , R. F. Xu , R. X. Xu , W. L. Xu , L. Xue , D. H. Yan , J. Z. Yan , T. Yan , C. W. Yang , F. Yang , F. F. Yang , H. W. Yang , J. Y. Yang , L. L. Yang , M. J. Yang , R. Z. Yang , S. B. Yang , Y. H. Yao , Z. G. Yao , Y. M. Ye , L. Q. Yin , N. Yin , X. H. You , Z. Y. You , Y. H. Yu , Q. Yuan , H. Yue , H. D. Zeng , T. X. Zeng , W. Zeng , M. Zha , B. B. Zhang , F. Zhang , H. M. Zhang , H. Y. Zhang , J. L. Zhang , L. X. Zhang , Li Zhang , P. F. Zhang , P. P. Zhang , R. Zhang , S. B. Zhang , S. R. Zhang , S. S. Zhang , X. Zhang , X. P. Zhang , Y. F. Zhang , Yi Zhang , Yong Zhang , B. Zhao , J. Zhao , L. Zhao , L. Z. Zhao , S. P. Zhao , F. Zheng , B. Zhou , H. Zhou , J. N. Zhou , M. Zhou , P. Zhou , R. Zhou , X. X. Zhou , C. G. Zhu , F. R. Zhu , H. Zhu , K. J. Zhu , X. Zuo

Diffuse continuum gamma rays from the Galaxy

A new study of the diffuse Galactic gamma-ray continuum radiation is presented, using a cosmic-ray propagation model which includes nucleons, antiprotons, electrons, positrons, and synchrotron radiation. Our treatment of the inverse Compton…

Astrophysics · Physics 2009-10-31 A. W. Strong , I. V. Moskalenko , O. Reimer

Diffuse TeV Gamma-Ray Emission in the H.E.S.S. Galactic Plane Survey

Diffuse gamma-ray emission has long been established as the most prominent feature in the GeV sky. Although the imaging atmospheric Cherenkov technique has been successful in revealing a large population of discrete TeV gamma-ray sources, a…

High Energy Astrophysical Phenomena · Physics 2019-08-15 K. Egberts , F. Brun , S. Casanova , W. Hofmann , M. de Naurois , O. Reimer , Q. Weitzel , Y. Fukui

C-Band All-Sky Survey: A First Look at the Galaxy

We present an analysis of the diffuse emission at 5 GHz in the first quadrant of the Galactic plane using two months of preliminary intensity data taken with the C-Band All Sky Survey (C-BASS) northern instrument at the Owens Valley Radio…

Astrophysics of Galaxies · Physics 2015-06-23 M. O. Irfan , C. Dickinson , R. D. Davies , C. Copley , R. J. Davis , P. G. Ferreira , C. M. Holler , J. L. Jonas , Michael E. Jones , O. G. King , J. P. Leahy , J. Leech , E. M. Leitch , S. J. C. Muchovej , T. J. Pearson , M. W. Peel , A. C. S. Readhead , M. A. Stevenson , D. Sutton , Angela C. Taylor , J. Zuntz

Diffuse gamma-ray emission: Galactic and extragalactic

Here is reviewed our current understanding of Galactic and extragalactic diffuse gamma-ray emission. The spectrum of the extragalactic gamma-ray background above 30 MeV can be well described by a power law with photon index s=2.1. In the…

Astrophysics · Physics 2007-05-23 Martin Pohl

Dissecting the Diffuse Emission of the Galaxy with the HAWC Observatory

Galactic diffuse gamma-ray emission is produced by the interaction of high-energy cosmic rays propagating through the Milky Way with interstellar gas and radiation fields. Its measurement can provide crucial insights into the acceleration…

High Energy Astrophysical Phenomena · Physics 2025-09-04 Georg Schwefer