Hard X-ray observation of NGC 4151 with the MIFRASO telescope
During a balloon flight on July 29, 1986 of the Mifraso telescope, a region of the sky containing the Seyfert galaxy NGC 4151 was studied over the photon energy range 15-300 keV. A 5.5 sigma excess, interpreted as originating from the direction of NGC 4151, was detected in the energy band 27-80 keV....
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| Veröffentlicht in: | The Astrophysical journal 1990-06, Vol.356 (2), p.467-471 |
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| container_end_page | 471 |
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| container_issue | 2 |
| container_start_page | 467 |
| container_title | The Astrophysical journal |
| container_volume | 356 |
| creator | PEROTTI, F BURATTI, R DIPPER, N. A LEWIS, R. A MAGGIOLI, P QUADRINI, E BAZZANO, A UBERTINI, P BASSANI, L STEPHEN, J. B COURT, A. J DEAN, A. J |
| description | During a balloon flight on July 29, 1986 of the Mifraso telescope, a region of the sky containing the Seyfert galaxy NGC 4151 was studied over the photon energy range 15-300 keV. A 5.5 sigma excess, interpreted as originating from the direction of NGC 4151, was detected in the energy band 27-80 keV. The corresponding emission spectrum may be represented by a single power law with a photon spectral index of alpha = 1.5 + or - 0.6. The result is compared to previous hard X-ray observations of this source. Apart from this measurement, an observation of the Crab Nebula as an in-flight calibration source of the telescope is described. 33 refs. |
| doi_str_mv | 10.1086/168854 |
| format | Article |
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Galactic and extragalactic objects and systems. The universe</subject><subject>SUPERNOVA REMNANTS</subject><subject>SURVEYS</subject><subject>TELESCOPES</subject><subject>X RADIATION 640105 -- Astrophysics & Cosmology-- Galaxies</subject><subject>X-RAY SPECTRA</subject><issn>0004-637X</issn><issn>1538-4357</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1990</creationdate><recordtype>article</recordtype><recordid>eNpF0EtLAzEUBeAgCtaqvyEIuhvNnbwXLkqxD6gWfEB3Qya9Q0fqpCRB6b-3ZQThwOXAx10cQq6B3QMz6gGUMVKckAFIbgrBpT4lA8aYKBTXq3NykdLnsZbWDsjjzMU1XRXR7WmoE8Zvl9vQ0dDQl-mYCpBAf9q8oXmD9Hk-eR29LWnGLSYfdnhJzhq3TXj1d4fkY_L0Pp4Vi-V0Ph4tCl9qkwvkBpraHqK1Y4ASpS8VCA5ghK2V1kqwtaylZ3VtsJQWgK_BG_BaoJF8SG76vyHltkq-zeg3PnQd-lwpxZhVR3TXIx9DShGbahfbLxf3FbDquEzVL3OAtz3cueTdtomu823617aUJeOW_wJwaF3X</recordid><startdate>19900620</startdate><enddate>19900620</enddate><creator>PEROTTI, F</creator><creator>BURATTI, R</creator><creator>DIPPER, N. A</creator><creator>LEWIS, R. 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The universe</topic><topic>SUPERNOVA REMNANTS</topic><topic>SURVEYS</topic><topic>TELESCOPES</topic><topic>X RADIATION 640105 -- Astrophysics & Cosmology-- Galaxies</topic><topic>X-RAY SPECTRA</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>PEROTTI, F</creatorcontrib><creatorcontrib>BURATTI, R</creatorcontrib><creatorcontrib>DIPPER, N. A</creatorcontrib><creatorcontrib>LEWIS, R. A</creatorcontrib><creatorcontrib>MAGGIOLI, P</creatorcontrib><creatorcontrib>QUADRINI, E</creatorcontrib><creatorcontrib>BAZZANO, A</creatorcontrib><creatorcontrib>UBERTINI, P</creatorcontrib><creatorcontrib>BASSANI, L</creatorcontrib><creatorcontrib>STEPHEN, J. B</creatorcontrib><creatorcontrib>COURT, A. J</creatorcontrib><creatorcontrib>DEAN, A. 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J</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Hard X-ray observation of NGC 4151 with the MIFRASO telescope</atitle><jtitle>The Astrophysical journal</jtitle><date>1990-06-20</date><risdate>1990</risdate><volume>356</volume><issue>2</issue><spage>467</spage><epage>471</epage><pages>467-471</pages><issn>0004-637X</issn><eissn>1538-4357</eissn><coden>ASJOAB</coden><abstract>During a balloon flight on July 29, 1986 of the Mifraso telescope, a region of the sky containing the Seyfert galaxy NGC 4151 was studied over the photon energy range 15-300 keV. A 5.5 sigma excess, interpreted as originating from the direction of NGC 4151, was detected in the energy band 27-80 keV. The corresponding emission spectrum may be represented by a single power law with a photon spectral index of alpha = 1.5 + or - 0.6. The result is compared to previous hard X-ray observations of this source. Apart from this measurement, an observation of the Crab Nebula as an in-flight calibration source of the telescope is described. 33 refs.</abstract><cop>Chicago, IL</cop><pub>University of Chicago Press</pub><doi>10.1086/168854</doi><tpages>5</tpages></addata></record> |
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| ispartof | The Astrophysical journal, 1990-06, Vol.356 (2), p.467-471 |
| issn | 0004-637X 1538-4357 |
| language | eng |
| recordid | cdi_osti_scitechconnect_6600965 |
| source | Alma/SFX Local Collection |
| subjects | AIRSHIPS Astronomy BALLOONS CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS COSMIC RADIO SOURCES CRAB NEBULA Earth, ocean, space ELECTROMAGNETIC RADIATION EMISSION SPECTRA Exact sciences and technology GALAXIES HARD X RADIATION IONIZING RADIATIONS NEBULAE Quasars. Active or peculiar galaxies, objects, and systems RADIATIONS SEYFERT GALAXIES SPECTRA SPECTROSCOPY Stellar systems. Galactic and extragalactic objects and systems. The universe SUPERNOVA REMNANTS SURVEYS TELESCOPES X RADIATION 640105 -- Astrophysics & Cosmology-- Galaxies X-RAY SPECTRA |
| title | Hard X-ray observation of NGC 4151 with the MIFRASO telescope |
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