S. Commichau - Academia.edu (original) (raw)

Papers by S. Commichau

Research paper thumbnail of FADC signal reconstruction for the MAGIC telescope

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2008

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Research paper thumbnail of Characterization of 13 and 30μm thick hydrogenated amorphous silicon diodes deposited over CMOS integrated circuits for particle detection application

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2004

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Research paper thumbnail of Search for Gamma Rays from the Galactic Center with the MAGIC Telescope

The Galactic Center (GC) is a very interesting region for gamma ray astronomy. Various possibilit... more The Galactic Center (GC) is a very interesting region for gamma ray astronomy. Various possibilities for the production of very high energy (VHE) gamma rays near the GC are discussed in the literature, like accretion flow onto the central black hole, supernova shocks in Sgr A East, proton acceleration near the event horizon of the black hole, or WIMP dark matter annihilation. At the Canary Island La Palma, the GC culminates at about 58 deg zenith angle (ZA). Between May and August it can be observed with the MAGIC telescope at up to 60 deg ZA. The large zenith angle leads to a good sensitivity for energies in the TeV range. The observation and analysis strategies are outlined and the status of the ongoing analysis is presented.

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Research paper thumbnail of Gamma-ray excess from a stacked sample of high-frequency peaked blazars observed with the MAGIC telescope

Between 2005 and 2009 a sample of 20 previously undetected high-frequency peaked blazars in the r... more Between 2005 and 2009 a sample of 20 previously undetected high-frequency peaked blazars in the redshift range from 0.018 to 0.361 was observed with the MAGIC telescope at energies above 100 GeV. None of the sources was detected during the observations, hence we present here the 99.7 % confidence flux upper limits. The individual flux upper limits lie between 2.9 % and 14.7 % of the integral flux from the Crab Nebula. Applying a stacking method to the sample with a total of 349.4 hrs effective exposure time, we find evidence for an excess with a cumulative significance of 4.5 standard deviations. The integral flux above 150 GeV corresponds to 1.40 % of the one from the Crab Nebula. The result, if interpreted as a detection, provides clues on the baseline emission of high-frequency peaked blazars at very high Gamma-ray energies.

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Research paper thumbnail of A G-APD based Camera for Imaging Atmospheric Cherenkov Telescopes

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2011

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Research paper thumbnail of A novel camera type for very high energy gamma-ray astronomy based on Geiger-mode avalanche photodiodes

Journal of Instrumentation, 2009

Geiger-mode avalanche photodiodes (G-APD) are promising new sensors for light detection in atmosp... more Geiger-mode avalanche photodiodes (G-APD) are promising new sensors for light detection in atmospheric Cherenkov telescopes. In this paper, the design and commissioning of a 36-pixel G-APD prototype camera is presented. The data acquisition is based on the Domino Ring Sampling (DRS2) chip. A sub-nanosecond time resolution has been achieved. Cosmic-ray induced air showers have been recorded using an imaging mirror setup, in a self-triggered mode. This is the first time that such measurements have been carried out with a complete G-APD camera.

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Research paper thumbnail of Observation of gamma rays from the galactic center with the magic telescope

Astrophysical Journal Letters, 2006

OBSERVATION OF GAMMA RAYS FROM THE GALACTIC CENTER WITH THE MAGIC TELESCOPE J. ALBERT,1 E. ALIU,2... more OBSERVATION OF GAMMA RAYS FROM THE GALACTIC CENTER WITH THE MAGIC TELESCOPE J. ALBERT,1 E. ALIU,2 H. ANDERHUB,3 P. ANTORANz,4 A. ARMADA,2 M. ASENSIO,4 C. BAIXERAS,5 JA BARRIO,4 M. BARTELT,6 H. BARTkO,7 D. BASTIERI,8 R. BAVIkADI,9 W. ...

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Research paper thumbnail of Unfolding of differential energy spectra in the MAGIC experiment

Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2007

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Research paper thumbnail of Simultaneous multiwavelength observations of the blazar 1ES 1959+650 at a low TeV flux

Astrophysical Journal, 2008

We present the results from a multiwavelength campaign on the TeV blazar 1ES 1959+650, performed ... more We present the results from a multiwavelength campaign on the TeV blazar 1ES 1959+650, performed in May, 2006. Data from the optical, UV, soft- and hard-X-ray and very high energy (VHE) gamma-ray (E > 100 GeV) bands were obtained with the SUZAKU and SWIFT satellites, with the MAGIC telescope and other ground based facilities. The source spectral energy distribution (SED), derived from SUZAKU and MAGIC observations at the end of May 2006, shows the usual double hump shape, with the synchrotron peak at a higher flux level than the Compton peak. With respect to historical values, during our campaign the source exhibited a relatively high state in X-rays and optical, while in the VHE band it was at one of the lowest level so far recorded. We also monitored the source for flux-spectral variability on a time window of 10 days in the optical-UV and X-ray bands and 7 days in the VHE band. The source varies more in the X-ray, than in the optical band, with the 2-10 keV X-ray flux varying by a factor of ~2. The synchrotron peak is located in the X-ray band and moves to higher energies as the source gets brighter, with the X-ray fluxes above it varying more rapidly than the X-ray fluxes at lower energies. The variability behaviour observed in the X-ray band cannot be produced by emitting regions varying independently, and suggests instead some sort of ``standing shock'' scenario. The overall SED is well represented by an homogeneous one-zone synchrotron inverse Compton emission model, from which we derive physical parameters that are typical of high energy peaked blazars.

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Research paper thumbnail of Simultaneous multiwavelength observations of markarian 421 during outburst

Astrophysical Journal Letters, 2009

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Research paper thumbnail of Periodic Very High Energy Γ-Ray Emission From LS I +61°303 Observed With the Magic Telescope

The Astrophysical Journal, 2009

J. ALBERT1, E. ALIU2, H. ANDERHUB3, LA ANTONELLI4, P. ANTORANz5, M. BACkES6, C. BAIXERAS7, JA BAR... more J. ALBERT1, E. ALIU2, H. ANDERHUB3, LA ANTONELLI4, P. ANTORANz5, M. BACkES6, C. BAIXERAS7, JA BARRIO5, H. BARTkO8, D. BASTIERI9, JK BECkER6, W. BEDNAREk10, K. BERGER1, E. BERNARDINI11, C. BIGONGIARI9, A. BILAND3, RK BOCk8,9, G. ...

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Research paper thumbnail of First Bounds on the High-Energy Emission from Isolated Wolf-Rayet Binary Systems

The Astrophysical Journal, 2008

FIRST BOUNDS ON THE HIGH-ENERGY EMISSION FROM ISOLATED WOLF-RAYET BINARY SYSTEMS E. ALIU,1 H. AND... more FIRST BOUNDS ON THE HIGH-ENERGY EMISSION FROM ISOLATED WOLF-RAYET BINARY SYSTEMS E. ALIU,1 H. ANDERHUB,2 LA ANTONELLI,3 P. ANTORANz,4 M. BACkES,5 C. BAIXERAS,6 JA BARRIO,4 H. BARTkO,7 D. BASTIERI,8 JK BECkER,5 W. BEDNAREk,9 ...

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Research paper thumbnail of Magic Gamma-Ray Telescope Observation of the Perseus Cluster of Galaxies: Implications for Cosmic Rays, Dark Matter, and NGC 1275

The Astrophysical Journal, 2010

... We reproduce the observed spectral energy density by using the structured jet (spine-layer) m... more ... We reproduce the observed spectral energy density by using the structured jet (spine-layer) model which ... total masses M ∼ (1014–015) M⊙, of which galaxies, gas, and dark matter (DM) contribute ... in the past are galactic winds, ie outflows driven by the joint action of numerous ...

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Research paper thumbnail of MAGIC Observations of Very High Energy γ-Rays from HESS J1813-178

The Astrophysical Journal, 2006

MAGIC OBSERVATIONS OF VERY HIGH ENERGY g-RAYS FROM HESS J1813J178 J. ALBERT,1 E. ALIU,2 H. ANDERH... more MAGIC OBSERVATIONS OF VERY HIGH ENERGY g-RAYS FROM HESS J1813J178 J. ALBERT,1 E. ALIU,2 H. ANDERHUB,3 P. ANTORANz,4 A. ARMADA,2 M. ASENSIO,4 C. BAIXERAS,5 JA BARRIO,4 M. BARTEL,6 H. BARTkO,7 D. BASTIERI,8 R. BAVIkADI,9 W. ...

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Research paper thumbnail of First Bounds on the Very High Energy γ‐Ray Emission from Arp 220

The Astrophysical Journal, 2007

Using the Major Atmospheric Gamma Imaging Cerenkov Telescope (MAGIC), we have observed the neares... more Using the Major Atmospheric Gamma Imaging Cerenkov Telescope (MAGIC), we have observed the nearest ultraluminous infrared galaxy, Arp 220, for about 15 hr. No significant signal was detected within the dedicated amount of observation time. The first upper limits ...

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Research paper thumbnail of Very High Energy Gamma-Ray Observations of Strong Flaring Activity in M87 in 2008 February

The Astrophysical Journal, 2008

VERY HIGH ENERGY GAMMA-RAY OBSERVATIONS OF STRONG FLARING ACTIVITY IN M87 IN 2008 FEBRUARY J. ALB... more VERY HIGH ENERGY GAMMA-RAY OBSERVATIONS OF STRONG FLARING ACTIVITY IN M87 IN 2008 FEBRUARY J. ALBERT,1 E. ALIU,2 H. ANDERHUB,3 LA ANTONELLI,4 P. ANTORANz,5 M. BACkES,6 C. BAIXERAS,7 JA BARRIO,5 H. BARTkO,8 D. BASTIERI,9 ...

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Research paper thumbnail of Discovery of Very High Energy Gamma Radiation from IC 443 with the MAGIC Telescope

The Astrophysical Journal, 2007

DISCOVERY OF VERY HIGH ENERGY GAMMA RADIATION FROM IC 443 WITH THE MAGIC TELESCOPE J. ALBERT,1 E.... more DISCOVERY OF VERY HIGH ENERGY GAMMA RADIATION FROM IC 443 WITH THE MAGIC TELESCOPE J. ALBERT,1 E. ALIU,2 H. ANDERHUB,3 P. ANTORANz,4 A. ARMADA,2 C. BAIXERAS,5 JA BARRIO,4 H. BARTkO,6,7 D. BASTIERI,8 JK BECkER,9 W. ...

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Research paper thumbnail of Upper Limits on the Vhe Gamma-Ray Emission From the Willman 1 Satellite Galaxy With the Magic Telescope

The Astrophysical Journal, 2009

... Among them, one of the best theoretically motivated, for whom the relic density is calculated... more ... Among them, one of the best theoretically motivated, for whom the relic density is calculated without fine tuning from its nature, is the neutralino, arising in SuperSymmetric (SUSY) theories beyond the Standard Model (Wess & Zumino 1974; Haber & Kane. ...

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Research paper thumbnail of Correlated X-Ray and Very High Energy Emission in the Gamma-Ray Binary LS I +61 303

The Astrophysical Journal, 2009

... 3, D. BASTIERI6, J. BECERRA GONzÁLEz7, JK BECkER4, W. BEDNAREk8, K. BERGER8, E. BERNARDINI9, ... more ... 3, D. BASTIERI6, J. BECERRA GONzÁLEz7, JK BECkER4, W. BEDNAREk8, K. BERGER8, E. BERNARDINI9, A. BILAND1, O. BLANCH BIGAS10 ... We estimate the systematic uncertainty to be about 30% for the derived integral flux values and ±0.2 for the obtained photon index. ...

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Research paper thumbnail of Very High Energy Gamma-Ray Radiation from the Stellar Mass Black Hole Binary Cygnus X-1

The Astrophysical Journal, 2007

... GAMMA-RAY RADIATION FROM THE STELLAR MASS BLACK HOLE BINARY CYGNUS X-1 J. ALBERT,1 E ... F. D... more ... GAMMA-RAY RADIATION FROM THE STELLAR MASS BLACK HOLE BINARY CYGNUS X-1 J. ALBERT,1 E ... F. DAzzI,7 A. DE ANGELIS,14 C. DELGADO,12 R. DE LOS REYES,4 B. DE LOTTO ... 1 M. DORO,7 M. ERRANDO,2 M. FAGIOLINI,15 D. FERENC,16 E. FERNÁNDEz,2 R ...

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Research paper thumbnail of FADC signal reconstruction for the MAGIC telescope

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2008

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Research paper thumbnail of Characterization of 13 and 30μm thick hydrogenated amorphous silicon diodes deposited over CMOS integrated circuits for particle detection application

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2004

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Research paper thumbnail of Search for Gamma Rays from the Galactic Center with the MAGIC Telescope

The Galactic Center (GC) is a very interesting region for gamma ray astronomy. Various possibilit... more The Galactic Center (GC) is a very interesting region for gamma ray astronomy. Various possibilities for the production of very high energy (VHE) gamma rays near the GC are discussed in the literature, like accretion flow onto the central black hole, supernova shocks in Sgr A East, proton acceleration near the event horizon of the black hole, or WIMP dark matter annihilation. At the Canary Island La Palma, the GC culminates at about 58 deg zenith angle (ZA). Between May and August it can be observed with the MAGIC telescope at up to 60 deg ZA. The large zenith angle leads to a good sensitivity for energies in the TeV range. The observation and analysis strategies are outlined and the status of the ongoing analysis is presented.

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Gamma-ray excess from a stacked sample of high-frequency peaked blazars observed with the MAGIC telescope

Between 2005 and 2009 a sample of 20 previously undetected high-frequency peaked blazars in the r... more Between 2005 and 2009 a sample of 20 previously undetected high-frequency peaked blazars in the redshift range from 0.018 to 0.361 was observed with the MAGIC telescope at energies above 100 GeV. None of the sources was detected during the observations, hence we present here the 99.7 % confidence flux upper limits. The individual flux upper limits lie between 2.9 % and 14.7 % of the integral flux from the Crab Nebula. Applying a stacking method to the sample with a total of 349.4 hrs effective exposure time, we find evidence for an excess with a cumulative significance of 4.5 standard deviations. The integral flux above 150 GeV corresponds to 1.40 % of the one from the Crab Nebula. The result, if interpreted as a detection, provides clues on the baseline emission of high-frequency peaked blazars at very high Gamma-ray energies.

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Research paper thumbnail of A G-APD based Camera for Imaging Atmospheric Cherenkov Telescopes

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2011

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Research paper thumbnail of A novel camera type for very high energy gamma-ray astronomy based on Geiger-mode avalanche photodiodes

Journal of Instrumentation, 2009

Geiger-mode avalanche photodiodes (G-APD) are promising new sensors for light detection in atmosp... more Geiger-mode avalanche photodiodes (G-APD) are promising new sensors for light detection in atmospheric Cherenkov telescopes. In this paper, the design and commissioning of a 36-pixel G-APD prototype camera is presented. The data acquisition is based on the Domino Ring Sampling (DRS2) chip. A sub-nanosecond time resolution has been achieved. Cosmic-ray induced air showers have been recorded using an imaging mirror setup, in a self-triggered mode. This is the first time that such measurements have been carried out with a complete G-APD camera.

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Research paper thumbnail of Observation of gamma rays from the galactic center with the magic telescope

Astrophysical Journal Letters, 2006

OBSERVATION OF GAMMA RAYS FROM THE GALACTIC CENTER WITH THE MAGIC TELESCOPE J. ALBERT,1 E. ALIU,2... more OBSERVATION OF GAMMA RAYS FROM THE GALACTIC CENTER WITH THE MAGIC TELESCOPE J. ALBERT,1 E. ALIU,2 H. ANDERHUB,3 P. ANTORANz,4 A. ARMADA,2 M. ASENSIO,4 C. BAIXERAS,5 JA BARRIO,4 M. BARTELT,6 H. BARTkO,7 D. BASTIERI,8 R. BAVIkADI,9 W. ...

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Research paper thumbnail of Unfolding of differential energy spectra in the MAGIC experiment

Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2007

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Research paper thumbnail of Simultaneous multiwavelength observations of the blazar 1ES 1959+650 at a low TeV flux

Astrophysical Journal, 2008

We present the results from a multiwavelength campaign on the TeV blazar 1ES 1959+650, performed ... more We present the results from a multiwavelength campaign on the TeV blazar 1ES 1959+650, performed in May, 2006. Data from the optical, UV, soft- and hard-X-ray and very high energy (VHE) gamma-ray (E > 100 GeV) bands were obtained with the SUZAKU and SWIFT satellites, with the MAGIC telescope and other ground based facilities. The source spectral energy distribution (SED), derived from SUZAKU and MAGIC observations at the end of May 2006, shows the usual double hump shape, with the synchrotron peak at a higher flux level than the Compton peak. With respect to historical values, during our campaign the source exhibited a relatively high state in X-rays and optical, while in the VHE band it was at one of the lowest level so far recorded. We also monitored the source for flux-spectral variability on a time window of 10 days in the optical-UV and X-ray bands and 7 days in the VHE band. The source varies more in the X-ray, than in the optical band, with the 2-10 keV X-ray flux varying by a factor of ~2. The synchrotron peak is located in the X-ray band and moves to higher energies as the source gets brighter, with the X-ray fluxes above it varying more rapidly than the X-ray fluxes at lower energies. The variability behaviour observed in the X-ray band cannot be produced by emitting regions varying independently, and suggests instead some sort of ``standing shock'' scenario. The overall SED is well represented by an homogeneous one-zone synchrotron inverse Compton emission model, from which we derive physical parameters that are typical of high energy peaked blazars.

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Research paper thumbnail of Simultaneous multiwavelength observations of markarian 421 during outburst

Astrophysical Journal Letters, 2009

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Research paper thumbnail of Periodic Very High Energy Γ-Ray Emission From LS I +61°303 Observed With the Magic Telescope

The Astrophysical Journal, 2009

J. ALBERT1, E. ALIU2, H. ANDERHUB3, LA ANTONELLI4, P. ANTORANz5, M. BACkES6, C. BAIXERAS7, JA BAR... more J. ALBERT1, E. ALIU2, H. ANDERHUB3, LA ANTONELLI4, P. ANTORANz5, M. BACkES6, C. BAIXERAS7, JA BARRIO5, H. BARTkO8, D. BASTIERI9, JK BECkER6, W. BEDNAREk10, K. BERGER1, E. BERNARDINI11, C. BIGONGIARI9, A. BILAND3, RK BOCk8,9, G. ...

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Research paper thumbnail of First Bounds on the High-Energy Emission from Isolated Wolf-Rayet Binary Systems

The Astrophysical Journal, 2008

FIRST BOUNDS ON THE HIGH-ENERGY EMISSION FROM ISOLATED WOLF-RAYET BINARY SYSTEMS E. ALIU,1 H. AND... more FIRST BOUNDS ON THE HIGH-ENERGY EMISSION FROM ISOLATED WOLF-RAYET BINARY SYSTEMS E. ALIU,1 H. ANDERHUB,2 LA ANTONELLI,3 P. ANTORANz,4 M. BACkES,5 C. BAIXERAS,6 JA BARRIO,4 H. BARTkO,7 D. BASTIERI,8 JK BECkER,5 W. BEDNAREk,9 ...

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Research paper thumbnail of Magic Gamma-Ray Telescope Observation of the Perseus Cluster of Galaxies: Implications for Cosmic Rays, Dark Matter, and NGC 1275

The Astrophysical Journal, 2010

... We reproduce the observed spectral energy density by using the structured jet (spine-layer) m... more ... We reproduce the observed spectral energy density by using the structured jet (spine-layer) model which ... total masses M ∼ (1014–015) M⊙, of which galaxies, gas, and dark matter (DM) contribute ... in the past are galactic winds, ie outflows driven by the joint action of numerous ...

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Research paper thumbnail of MAGIC Observations of Very High Energy γ-Rays from HESS J1813-178

The Astrophysical Journal, 2006

MAGIC OBSERVATIONS OF VERY HIGH ENERGY g-RAYS FROM HESS J1813J178 J. ALBERT,1 E. ALIU,2 H. ANDERH... more MAGIC OBSERVATIONS OF VERY HIGH ENERGY g-RAYS FROM HESS J1813J178 J. ALBERT,1 E. ALIU,2 H. ANDERHUB,3 P. ANTORANz,4 A. ARMADA,2 M. ASENSIO,4 C. BAIXERAS,5 JA BARRIO,4 M. BARTEL,6 H. BARTkO,7 D. BASTIERI,8 R. BAVIkADI,9 W. ...

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Research paper thumbnail of First Bounds on the Very High Energy γ‐Ray Emission from Arp 220

The Astrophysical Journal, 2007

Using the Major Atmospheric Gamma Imaging Cerenkov Telescope (MAGIC), we have observed the neares... more Using the Major Atmospheric Gamma Imaging Cerenkov Telescope (MAGIC), we have observed the nearest ultraluminous infrared galaxy, Arp 220, for about 15 hr. No significant signal was detected within the dedicated amount of observation time. The first upper limits ...

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Research paper thumbnail of Very High Energy Gamma-Ray Observations of Strong Flaring Activity in M87 in 2008 February

The Astrophysical Journal, 2008

VERY HIGH ENERGY GAMMA-RAY OBSERVATIONS OF STRONG FLARING ACTIVITY IN M87 IN 2008 FEBRUARY J. ALB... more VERY HIGH ENERGY GAMMA-RAY OBSERVATIONS OF STRONG FLARING ACTIVITY IN M87 IN 2008 FEBRUARY J. ALBERT,1 E. ALIU,2 H. ANDERHUB,3 LA ANTONELLI,4 P. ANTORANz,5 M. BACkES,6 C. BAIXERAS,7 JA BARRIO,5 H. BARTkO,8 D. BASTIERI,9 ...

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Research paper thumbnail of Discovery of Very High Energy Gamma Radiation from IC 443 with the MAGIC Telescope

The Astrophysical Journal, 2007

DISCOVERY OF VERY HIGH ENERGY GAMMA RADIATION FROM IC 443 WITH THE MAGIC TELESCOPE J. ALBERT,1 E.... more DISCOVERY OF VERY HIGH ENERGY GAMMA RADIATION FROM IC 443 WITH THE MAGIC TELESCOPE J. ALBERT,1 E. ALIU,2 H. ANDERHUB,3 P. ANTORANz,4 A. ARMADA,2 C. BAIXERAS,5 JA BARRIO,4 H. BARTkO,6,7 D. BASTIERI,8 JK BECkER,9 W. ...

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Research paper thumbnail of Upper Limits on the Vhe Gamma-Ray Emission From the Willman 1 Satellite Galaxy With the Magic Telescope

The Astrophysical Journal, 2009

... Among them, one of the best theoretically motivated, for whom the relic density is calculated... more ... Among them, one of the best theoretically motivated, for whom the relic density is calculated without fine tuning from its nature, is the neutralino, arising in SuperSymmetric (SUSY) theories beyond the Standard Model (Wess & Zumino 1974; Haber & Kane. ...

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Research paper thumbnail of Correlated X-Ray and Very High Energy Emission in the Gamma-Ray Binary LS I +61 303

The Astrophysical Journal, 2009

... 3, D. BASTIERI6, J. BECERRA GONzÁLEz7, JK BECkER4, W. BEDNAREk8, K. BERGER8, E. BERNARDINI9, ... more ... 3, D. BASTIERI6, J. BECERRA GONzÁLEz7, JK BECkER4, W. BEDNAREk8, K. BERGER8, E. BERNARDINI9, A. BILAND1, O. BLANCH BIGAS10 ... We estimate the systematic uncertainty to be about 30% for the derived integral flux values and ±0.2 for the obtained photon index. ...

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Research paper thumbnail of Very High Energy Gamma-Ray Radiation from the Stellar Mass Black Hole Binary Cygnus X-1

The Astrophysical Journal, 2007

... GAMMA-RAY RADIATION FROM THE STELLAR MASS BLACK HOLE BINARY CYGNUS X-1 J. ALBERT,1 E ... F. D... more ... GAMMA-RAY RADIATION FROM THE STELLAR MASS BLACK HOLE BINARY CYGNUS X-1 J. ALBERT,1 E ... F. DAzzI,7 A. DE ANGELIS,14 C. DELGADO,12 R. DE LOS REYES,4 B. DE LOTTO ... 1 M. DORO,7 M. ERRANDO,2 M. FAGIOLINI,15 D. FERENC,16 E. FERNÁNDEz,2 R ...

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