DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Fermi Large Area Telescope observations of the crab pulsar and nebula

Abstract

Here, we report on γ-ray observations of the Crab Pulsar and Nebula using 8 months of survey data with the Fermi Large Area Telescope (LAT). The high quality light curve obtained using the ephemeris provided by the Nançay and Jodrell Bank radio telescopes shows two main peaks stable in phase with energy. The first γ-ray peak leads the radio main pulse by (281 ± 12 ± 21) μs, giving new constraints on the production site of non-thermal emission in pulsar magnetospheres. The first uncertainty is due to γ-ray statistics, and the second arises from the rotation parameters. The improved sensitivity and the unprecedented statistics afforded by the LAT enable precise measurement of the Crab Pulsar spectral parameters: cut-off energy at Ec = (5.8 ± 0.5 ± 1.2) GeV, spectral index of Γ = (1.97 ± 0.02 ± 0.06) and integral photon flux above 100 MeV of (2.09 ± 0.03 ± 0.18) × 10–6 cm–2 s–1. The first errors represent the statistical error on the fit parameters, while the second ones are the systematic uncertainties. Pulsed γ-ray photons are observed up to ~ 20 GeV which precludes emission near the stellar surface, below altitudes of around 4-5 stellar radii in phasemore » intervals encompassing the two main peaks. We also performed a detailed phase-resolved spectral analysis : the hardest emission from the Crab Pulsar comes from the bridge region between the two γ-ray peaks while the softest comes from the falling edge of the second peak. Furthermore, the spectrum of the nebula in the energy range 100 MeV-300 GeV is well described by the sum of two power laws of indices Γsync = (3.99 ± 0.12 ± 0.08) and ΓIC = (1.64 ± 0.05 ± 0.07), corresponding to the falling edge of the synchrotron and the rising edge of the inverse Compton (IC) components, respectively. This latter, which links up naturally with the spectral data points of Cherenkov experiments, is well reproduced via IC scattering from standard magnetohydrodynamic nebula models, and does not require any additional radiation mechanism.« less

Authors:
 [1]
  1. Naval Research Lab., Washington, D.C. (United States); National Academy of Science, Washington, D.C. (United States). et al.
Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org.:
USDOE
Contributing Org.:
Fermi LAT Collaboration
OSTI Identifier:
1357592
Grant/Contract Number:  
AC02-76SF00515
Resource Type:
Accepted Manuscript
Journal Name:
The Astrophysical Journal
Additional Journal Information:
Journal Volume: 708; Journal Issue: 2; Journal ID: ISSN 0004-637X
Publisher:
Institute of Physics (IOP)
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; gamma rays: observations; ISM: individual (Crab Nebula); pulsars: individual (Crab); supernova remnants

Citation Formats

Abdo, A. A. Fermi Large Area Telescope observations of the crab pulsar and nebula. United States: N. p., 2009. Web. doi:10.1088/0004-637X/708/2/1254.
Abdo, A. A. Fermi Large Area Telescope observations of the crab pulsar and nebula. United States. https://doi.org/10.1088/0004-637X/708/2/1254
Abdo, A. A. Mon . "Fermi Large Area Telescope observations of the crab pulsar and nebula". United States. https://doi.org/10.1088/0004-637X/708/2/1254. https://www.osti.gov/servlets/purl/1357592.
@article{osti_1357592,
title = {Fermi Large Area Telescope observations of the crab pulsar and nebula},
author = {Abdo, A. A.},
abstractNote = {Here, we report on γ-ray observations of the Crab Pulsar and Nebula using 8 months of survey data with the Fermi Large Area Telescope (LAT). The high quality light curve obtained using the ephemeris provided by the Nançay and Jodrell Bank radio telescopes shows two main peaks stable in phase with energy. The first γ-ray peak leads the radio main pulse by (281 ± 12 ± 21) μs, giving new constraints on the production site of non-thermal emission in pulsar magnetospheres. The first uncertainty is due to γ-ray statistics, and the second arises from the rotation parameters. The improved sensitivity and the unprecedented statistics afforded by the LAT enable precise measurement of the Crab Pulsar spectral parameters: cut-off energy at Ec = (5.8 ± 0.5 ± 1.2) GeV, spectral index of Γ = (1.97 ± 0.02 ± 0.06) and integral photon flux above 100 MeV of (2.09 ± 0.03 ± 0.18) × 10–6 cm–2 s–1. The first errors represent the statistical error on the fit parameters, while the second ones are the systematic uncertainties. Pulsed γ-ray photons are observed up to ~ 20 GeV which precludes emission near the stellar surface, below altitudes of around 4-5 stellar radii in phase intervals encompassing the two main peaks. We also performed a detailed phase-resolved spectral analysis : the hardest emission from the Crab Pulsar comes from the bridge region between the two γ-ray peaks while the softest comes from the falling edge of the second peak. Furthermore, the spectrum of the nebula in the energy range 100 MeV-300 GeV is well described by the sum of two power laws of indices Γsync = (3.99 ± 0.12 ± 0.08) and ΓIC = (1.64 ± 0.05 ± 0.07), corresponding to the falling edge of the synchrotron and the rising edge of the inverse Compton (IC) components, respectively. This latter, which links up naturally with the spectral data points of Cherenkov experiments, is well reproduced via IC scattering from standard magnetohydrodynamic nebula models, and does not require any additional radiation mechanism.},
doi = {10.1088/0004-637X/708/2/1254},
journal = {The Astrophysical Journal},
number = 2,
volume = 708,
place = {United States},
year = {2009},
month = {12}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Citation Metrics:
Cited by: 148 works
Citation information provided by
Web of Science

Save / Share:

Works referenced in this record:

FERMI LARGE AREA TELESCOPE OBSERVATIONS OF THE VELA PULSAR
journal, April 2009


FERMI /LARGE AREA TELESCOPE BRIGHT GAMMA-RAY SOURCE LIST
journal, June 2009

  • Abdo, A. A.; Ackermann, M.; Ajello, M.
  • The Astrophysical Journal Supplement Series, Vol. 183, Issue 1
  • DOI: 10.1088/0067-0049/183/1/46

The on-orbit calibration of the Fermi Large Area Telescope
journal, October 2009


The Crab Nebula and Pulsar between 500 GeV and 80 TeV: Observations with the HEGRA Stereoscopic Air Cerenkov Telescopes
journal, October 2004

  • Aharonian, F.; Akhperjanian, A.; Beilicke, M.
  • The Astrophysical Journal, Vol. 614, Issue 2
  • DOI: 10.1086/423931

Observations of the Crab nebula with HESS
journal, September 2006

  • Aharonian, F.; Akhperjanian, A. G.; Bazer-Bachi, A. R.
  • Astronomy & Astrophysics, Vol. 457, Issue 3
  • DOI: 10.1051/0004-6361:20065351

VHE γ‐Ray Observation of the Crab Nebula and its Pulsar with the MAGIC Telescope
journal, February 2008

  • Albert, J.; Aliu, E.; Anderhub, H.
  • The Astrophysical Journal, Vol. 674, Issue 2
  • DOI: 10.1086/525270

Observation of Pulsed  -Rays Above 25 GeV from the Crab Pulsar with MAGIC
journal, November 2008


On the mechanisms of gamma radiation in the Crab Nebula
journal, January 1996

  • Atoyan, A. M.; Aharonian, F. A.
  • Monthly Notices of the Royal Astronomical Society, Vol. 278, Issue 2
  • DOI: 10.1093/mnras/278.2.525

THE LARGE AREA TELESCOPE ON THE FERMI GAMMA-RAY SPACE TELESCOPE MISSION
journal, May 2009


High-energy emission from pulsars: the polar cap scenario
journal, January 2004


Using the photons from the Crab Nebula seen by GLAST to calibrate MAGIC and the imaging air Cherenkov telescopes
journal, July 2005


A multidimensional unfolding method based on Bayes' theorem
journal, August 1995

  • D'Agostini, G.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 362, Issue 2-3
  • DOI: 10.1016/0168-9002(95)00274-X

Gamma-Ray Pulsars: Emission from Extended Polar CAP Cascades
journal, February 1996

  • Daugherty, Joseph K.; Harding, Alice K.
  • The Astrophysical Journal, Vol. 458
  • DOI: 10.1086/176811

Two‐Pole Caustic Model for High‐Energy Light Curves of Pulsars
journal, December 2003

  • Dyks, J.; Rudak, B.
  • The Astrophysical Journal, Vol. 598, Issue 2
  • DOI: 10.1086/379052

Phase‐resolved Studies of the High‐Energy Gamma‐Ray Emission from the Crab, Geminga, and Vela Pulsars
journal, February 1998

  • Fierro, J. M.; Michelson, P. F.; Nolan, P. L.
  • The Astrophysical Journal, Vol. 494, Issue 2
  • DOI: 10.1086/305219

The Spectrum of TeV Gamma Rays from the Crab Nebula
journal, August 1998

  • Hillas, A. M.; Akerlof, C. W.; Biller, S. D.
  • The Astrophysical Journal, Vol. 503, Issue 2
  • DOI: 10.1086/306005

Long-term timing observations of 374 pulsars
journal, October 2004


tempo2, a new pulsar-timing package - I. An overview: tempo2, a new pulsar-timing package - I. Overview
journal, May 2006


The expected high-energy to ultra-high-energy gamma-ray spectrum of the Crab Nebula
journal, September 1992

  • de Jager, O. C.; Harding, A. K.
  • The Astrophysical Journal, Vol. 396
  • DOI: 10.1086/171706

Gamma-Ray Observations of the Crab Nebula: A Study of the Synchro-Compton Spectrum
journal, January 1996

  • de Jager, O. C.; Harding, A. K.; Michelson, P. F.
  • The Astrophysical Journal, Vol. 457
  • DOI: 10.1086/176726

Magnetohydrodynamic model of Crab nebula radiation
journal, August 1984

  • Kennel, C. F.; Coroniti, F. V.
  • The Astrophysical Journal, Vol. 283
  • DOI: 10.1086/162357

The Crab pulsar in the 0.75-30 MeV range as seen by CGRO COMPTEL: A coherent high-energy picture from soft X-rays up to high-energy
journal, November 2001


Absolute timing with IBIS, SPI and JEM-X aboard INTEGRAL: Crab main-pulse arrival times in radio, X-rays and high-energy
journal, November 2003


23 years of Crab pulsar rotational history
journal, December 1993

  • Lyne, A. G.; Pritchard, R. S.; Graham Smith, F.
  • Monthly Notices of the Royal Astronomical Society, Vol. 265, Issue 4
  • DOI: 10.1093/mnras/265.4.1003

The Likelihood Analysis of EGRET Data
journal, April 1996

  • Mattox, J. R.; Bertsch, D. L.; Chiang, J.
  • The Astrophysical Journal, Vol. 461
  • DOI: 10.1086/177068

INTEGRAL observations of the Crab pulsar
journal, April 2006


Multifrequency Radio Observations of the Crab Pulsar
journal, September 1996

  • Moffett, David A.; Hankins, Timothy H.
  • The Astrophysical Journal, Vol. 468
  • DOI: 10.1086/177734

High‐Altitude Particle Acceleration and Radiation in Pulsar Slot Gaps
journal, May 2004

  • Muslimov, Alex G.; Harding, Alice K.
  • The Astrophysical Journal, Vol. 606, Issue 2
  • DOI: 10.1086/383079

Fitting Pulsar Wind Tori. II. Error Analysis and Applications
journal, January 2008

  • Ng, C. ‐Y.; Romani, Roger W.
  • The Astrophysical Journal, Vol. 673, Issue 1
  • DOI: 10.1086/523935

Observations of the Crab pulsar and nebula by the EGRET telescope on the Compton Gamma-Ray Observatory
journal, June 1993

  • Nolan, P. L.; Arzoumanian, Z.; Bertsch, D. L.
  • The Astrophysical Journal, Vol. 409
  • DOI: 10.1086/172699

Simultaneous absolute timing of the Crab pulsar at radio and optical wavelengths
journal, June 2008


HIGH-RESOLUTION TIMING OBSERVATIONS OF SPIN-POWERED PULSARS WITH THE AGILE GAMMA-RAY TELESCOPE
journal, February 2009


Gamma-Ray Pulsars: Radiation Processes in the Outer Magnetosphere
journal, October 1996

  • Romani, Roger W.
  • The Astrophysical Journal, Vol. 470
  • DOI: 10.1086/177878

Absolute Timing of the Crab Pulsar with the Rossi X-Ray Timing Explorer
journal, March 2004

  • Rots, Arnold H.; Jahoda, Keith; Lyne, Andrew G.
  • The Astrophysical Journal, Vol. 605, Issue 2
  • DOI: 10.1086/420842

Optical polarization of the Crab pulsar: precision measurements and comparison to the radio emission
journal, July 2009


Mrk 421, Mrk 501, and 1ES 1426+428 at 100 GeV with the CELESTE Cherenkov telescope
journal, September 2006


Pulsar timing for the Fermi gamma-ray space telescope
journal, October 2008


Diffuse Galactic Continuum Gamma Rays: A Model Compatible with EGRET Data and Cosmic‐Ray Measurements
journal, October 2004

  • Strong, Andrew W.; Moskalenko, Igor V.; Reimer, Olaf
  • The Astrophysical Journal, Vol. 613, Issue 2
  • DOI: 10.1086/423193

The distribution of cosmic-ray sources in the Galaxy, γ-rays and the gradient in the CO-to-H 2 relation
journal, July 2004


Detection of Gamma Rays of up to 50 T[CLC]e[/CLC]V from the Crab Nebula
journal, January 1998

  • Tanimori, T.; Sakurazawa, K.; Dazeley, S. A.
  • The Astrophysical Journal, Vol. 492, Issue 1
  • DOI: 10.1086/311077

Kinematics of the local universe: XII. 21-cm line measurements of 586 galaxies with the new Nançay receiver
journal, January 2005


An Atlas for Interpreting γ-Ray Pulsar Light Curves
journal, April 2009


Works referencing / citing this record:

Ten years of AGILE: the mission and scientific highlights
journal, September 2019


Design of the LHAASO detectors
journal, February 2018


Science with the Murchison Widefield Array: Phase I results and Phase II opportunities
journal, January 2019

  • Beardsley, A. P.; Johnston-Hollitt, M.; Trott, C. M.
  • Publications of the Astronomical Society of Australia, Vol. 36
  • DOI: 10.1017/pasa.2019.41

Radio emission physics in the Crab pulsar
journal, May 2016


No evidence for gamma-ray halos around active galactic nuclei resulting from intergalactic magnetic fields
journal, January 2011


Discovery of hard-spectrum γ -ray emission from the BL Lacertae object 1ES 0414+009
journal, February 2012


Detection of bridge emission above 50 GeV from the Crab pulsar with the MAGIC telescopes
journal, May 2014


Teraelectronvolt pulsed emission from the Crab Pulsar detected by MAGIC
journal, January 2016


Search for VHE gamma-ray emission from Geminga pulsar and nebula with the MAGIC telescopes
journal, June 2016


First ground-based measurement of sub-20 GeV to 100 GeV γ -Rays from the Vela pulsar with H.E.S.S. II
journal, December 2018


Statistics of VHE γ -rays in temporal association with radio giant pulses from the Crab pulsar
journal, January 2020


FERMI LARGE AREA TELESCOPE OBSERVATIONS OF TWO GAMMA-RAY EMISSION COMPONENTS FROM THE QUIESCENT SUN
journal, June 2011


CHANDRA PHASE-RESOLVED X-RAY SPECTROSCOPY OF THE CRAB PULSAR
journal, November 2011

  • Weisskopf, Martin C.; Tennant, Allyn F.; Yakovlev, Dmitry G.
  • The Astrophysical Journal, Vol. 743, Issue 2
  • DOI: 10.1088/0004-637x/743/2/139

Physical Conditions in the Reconnection Layer in Pulsar Magnetospheres
journal, December 2013


The crab Pulsar at Centimeter Wavelengths. i. Ensemble Characteristics
journal, April 2015


FERMI LARGE AREA TELESCOPE FIRST SOURCE CATALOG
journal, May 2010

  • Abdo, A. A.; Ackermann, M.; Ajello, M.
  • The Astrophysical Journal Supplement Series, Vol. 188, Issue 2
  • DOI: 10.1088/0067-0049/188/2/405

FERMI LARGE AREA TELESCOPE SECOND SOURCE CATALOG
journal, March 2012

  • Nolan, P. L.; Abdo, A. A.; Ackermann, M.
  • The Astrophysical Journal Supplement Series, Vol. 199, Issue 2
  • DOI: 10.1088/0067-0049/199/2/31

THE FERMI LARGE AREA TELESCOPE ON ORBIT: EVENT CLASSIFICATION, INSTRUMENT RESPONSE FUNCTIONS, AND CALIBRATION
journal, October 2012

  • Ackermann, M.; Ajello, M.; Albert, A.
  • The Astrophysical Journal Supplement Series, Vol. 203, Issue 1
  • DOI: 10.1088/0067-0049/203/1/4

THE SECOND FERMI LARGE AREA TELESCOPE CATALOG OF GAMMA-RAY PULSARS
journal, September 2013

  • Abdo, A. A.; Ajello, M.; Allafort, A.
  • The Astrophysical Journal Supplement Series, Vol. 208, Issue 2
  • DOI: 10.1088/0067-0049/208/2/17

FERMI LARGE AREA TELESCOPE THIRD SOURCE CATALOG
journal, June 2015

  • Acero, F.; Ackermann, M.; Ajello, M.
  • The Astrophysical Journal Supplement Series, Vol. 218, Issue 2
  • DOI: 10.1088/0067-0049/218/2/23

Observational diversity of magnetized neutron stars
journal, September 2019

  • Enoto, Teruaki; Kisaka, Shota; Shibata, Shinpei
  • Reports on Progress in Physics, Vol. 82, Issue 10
  • DOI: 10.1088/1361-6633/ab3def

Radio/Gamma-Ray time Delay in the Parsec-Scale Cores of Active Galactic Nuclei
journal, September 2010


When a Standard Candle Flickers
journal, January 2011

  • Wilson-Hodge, Colleen A.; Cherry, Michael L.; Case, Gary L.
  • The Astrophysical Journal, Vol. 727, Issue 2
  • DOI: 10.1088/2041-8205/727/2/l40

Pulsed VHE emission from the Crab Pulsar in the context of magnetocentrifugal particle acceleration
journal, September 2016

  • Osmanov, Z.; Rieger, F. M.
  • Monthly Notices of the Royal Astronomical Society, Vol. 464, Issue 2
  • DOI: 10.1093/mnras/stw2408

Prospects for the detection of high-energy (E > 25 GeV) Fermi pulsars with the Cherenkov Telescope Array
journal, June 2017

  • Burtovoi, A.; Saito, T. Y.; Zampieri, L.
  • Monthly Notices of the Royal Astronomical Society, Vol. 471, Issue 1
  • DOI: 10.1093/mnras/stx1582

Interpreting Crab Nebula’s synchrotron spectrum: two acceleration mechanisms
journal, August 2019

  • Lyutikov, Maxim; Temim, Tea; Komissarov, Sergey
  • Monthly Notices of the Royal Astronomical Society, Vol. 489, Issue 2
  • DOI: 10.1093/mnras/stz2023

Prospects for the characterization of the VHE emission from the Crab nebula and pulsar with the Cherenkov Telescope Array
journal, December 2019

  • Mestre, E.; de Oña Wilhelmi, E.; Zanin, R.
  • Monthly Notices of the Royal Astronomical Society, Vol. 492, Issue 1
  • DOI: 10.1093/mnras/stz3421

Very high energy emission as a probe of relativistic magnetic reconnection in pulsar winds
journal, March 2015

  • Mochol, Iwona; Pétri, Jérôme
  • Monthly Notices of the Royal Astronomical Society: Letters, Vol. 449, Issue 1
  • DOI: 10.1093/mnrasl/slv018

Polarization observations of 20 millisecond pulsars: Polarization observations of 20 MSPs
journal, March 2011


Crab nebula gamma-ray flares as relativistic reconnection minijets: Crab flares as minijets
journal, October 2012


On the origin of sub-TeV gamma-ray pulsed emission from rotating neutron stars: Sub-TeV pulsed emission from rotating neutron stars
journal, July 2012


Gamma-ray flare and absorption in the Crab nebula: lovely TeV-PeV astrophysics: TeV-PeV gamma-ray flare and absorption in the Crab nebula
journal, July 2012


Time-dependent modelling of pulsar wind nebulae: study on the impact of the diffusion-loss approximations: Time-dependent modelling of PWNe
journal, October 2012


Gamma-Ray Flares from the Crab Nebula
journal, January 2011


Discovery of Powerful Gamma-Ray Flares from the Crab Nebula
journal, January 2011


Detection of Pulsed Gamma Rays Above 100 GeV from the Crab Pulsar
journal, October 2011


Observation of the Black Widow B1957+20 millisecond pulsar binary system with the MAGIC telescopes
text, January 2017

  • Ahnen, M. L.; Ansoldi, S.; Antonelli, L. A.
  • Deutsches Elektronen-Synchrotron, DESY, Hamburg
  • DOI: 10.3204/pubdb-2017-10005

The crab Pulsar at Centimeter Wavelengths. ii. Single Pulses
journal, December 2016


Time Evolution of the X-Ray and γ -Ray Fluxes of the Crab Pulsar
journal, September 2018


Characteristics and Performance of the CALorimetric Electron Telescope (CALET) Calorimeter for Gamma-Ray Observations
journal, September 2018

  • Cannady, N.; Asaoka, Y.; Satoh, F.
  • The Astrophysical Journal Supplement Series, Vol. 238, Issue 1
  • DOI: 10.3847/1538-4365/aad6a3

Pulsar Radio Emission Mechanism: Radio Nanoshots as a Low-frequency Afterglow of Relativistic Magnetic Reconnection
journal, April 2019

  • Philippov, Alexander; Uzdensky, Dmitri A.; Spitkovsky, Anatoly
  • The Astrophysical Journal, Vol. 876, Issue 1
  • DOI: 10.3847/2041-8213/ab1590

Observation of the black widow B1957+20 millisecond pulsar binary system with the MAGIC telescopes
journal, June 2017

  • Ahnen, M. L.; Ansoldi, S.; Antonelli, L. A.
  • Monthly Notices of the Royal Astronomical Society, Vol. 470, Issue 4
  • DOI: 10.1093/mnras/stx1405

When a Standard Candle Flickers
conference, November 2011

  • Wilson-Hodge, Colleen; Cherry, Michael L.; Case, Gary L.
  • Proceedings of 8th INTEGRAL Workshop “The Restless Gamma-ray Universe” — PoS(INTEGRAL 2010)
  • DOI: 10.22323/1.115.0031

The Second Fermi Large area Telescope Catalog of Gamma-Ray Pulsars
text, January 2013

  • Abdo, A. A.; Ajello, M.; Allafort, A.
  • Deutsches Elektronen-Synchrotron, DESY, Hamburg
  • DOI: 10.3204/desy-2014-00864

Search for VHE gamma-ray emission from Geminga pulsar and nebula with the MAGIC telescopes
text, January 2016

  • Ahnen, M. L.; Ansoldi, S.; Antonelli, L. A.
  • Deutsches Elektronen-Synchrotron, DESY, Hamburg
  • DOI: 10.3204/pubdb-2016-04021

Prospects for the characterization of the VHE emission from the Crab Nebula and Pulsar with the Cherenkov Telescope Array
text, January 2019

  • Mestre, Enrique; Wilhelmi, Emma De Oña; Zanin, Roberta
  • Deutsches Elektronen-Synchrotron, DESY, Hamburg
  • DOI: 10.3204/pubdb-2020-00101

Statistics of VHE γ -rays in temporal association with radio giant pulses from the Crab pulsar
text, January 2020

  • Ahnen, M. L.; Ansoldi, S.; Antonelli, L. A.
  • Deutsches Elektronen-Synchrotron, DESY, Hamburg
  • DOI: 10.3204/pubdb-2020-00671

First ground-based measurement of sub-20 GeV to 100 GeV $\gamma$-Rays from the Vela pulsar with H.E.S.S. II
text, January 2018

  • Abdalla, H.; Aharonian, F.; Ait Benkhali, F.
  • Deutsches Elektronen-Synchrotron, DESY, Hamburg
  • DOI: 10.3204/pubdb-2018-05469

Resolving the Crab pulsar wind nebula at teraelectronvolt energies
text, January 2019

  • Abdalla, H.; Aharonian, F.; Benkhali, F. Ait
  • Deutsches Elektronen-Synchrotron, DESY, Hamburg
  • DOI: 10.3204/pubdb-2020-00088