Eintrag weiter verarbeiten
Online-Ressource

MINUTE-TIMESCALE 100 MeV γ-RAY VARIABILITY DURING THE GIANT OUTBURST OF QUASAR 3C 279 OBSERVED BY FERMI-LAT IN 2015 JUNE

Gespeichert in:

Bibliographische Detailangaben
Zeitschriftentitel: The Astrophysical Journal Letters
Personen und Körperschaften: Ackermann, M., Anantua, R., Asano, K., Baldini, L., Barbiellini, G., Bastieri, D., Gonzalez, J. Becerra, Bellazzini, R., Bissaldi, E., Blandford, R. D., Bloom, E. D., Bonino, R., Bottacini, E., Bruel, P., Buehler, R., Caliandro, G. A., Cameron, R. A., Caragiulo, M., Caraveo, P. A., Cavazzuti, E., Cecchi, C., Cheung, C. C., Chiang, J., Chiaro, G., Ciprini, S., Cohen-Tanugi, J., Costanza, F., Cutini, S., D’Ammando, F., Palma, F. de, Desiante, R., Digel, S. W., Lalla, N. Di, Mauro, M. Di, Venere, L. Di, Drell, P. S., Favuzzi, C., Fegan, S. J., Ferrara, E. C., Fukazawa, Y., Funk, S., Fusco, P., Gargano, F., Gasparrini, D., Giglietto, N., Giordano, F., Giroletti, M., Grenier, I. A., Guillemot, L., Guiriec, S., Hayashida, M., Hays, E., Horan, D., Jóhannesson, G., Kensei, S., Kocevski, D., Kuss, M., Mura, G. La, Larsson, S., Latronico, L., Li, J., Longo, F., Loparco, F., Lott, B., Lovellette, M. N., Lubrano, P., Madejski, G. M., Magill, J. D., Maldera, S., Manfreda, A., Mayer, M., Mazziotta, M. N., Michelson, P. F., Mirabal, N., Mizuno, T., Monzani, M. E., Morselli, A., Moskalenko, I. V., Nalewajko, K., Negro, M., Nuss, E., Ohsugi, T., Orlando, E., Paneque, D., Perkins, J. S., Pesce-Rollins, M., Piron, F., Pivato, G., Porter, T. A., Principe, G., Rando, R., Razzano, M., Razzaque, S., Reimer, A., Scargle, J. D., Sgrò, C., Sikora, M., Simone, D., Siskind, E. J., Spada, F., Spinelli, P., Stawarz, L., Thayer, J. B., Thompson, D. J., Torres, D. F., Troja, E., Uchiyama, Y., Yuan, Y., Zimmer, S.
In: The Astrophysical Journal Letters, 824, 2016, 2, S. L20
Format: E-Article
Sprache: Unbestimmt
veröffentlicht:
American Astronomical Society
Schlagwörter:
Space and Planetary Science
Astronomy and Astrophysics
author_facet Ackermann, M.
Anantua, R.
Asano, K.
Baldini, L.
Barbiellini, G.
Bastieri, D.
Gonzalez, J. Becerra
Bellazzini, R.
Bissaldi, E.
Blandford, R. D.
Bloom, E. D.
Bonino, R.
Bottacini, E.
Bruel, P.
Buehler, R.
Caliandro, G. A.
Cameron, R. A.
Caragiulo, M.
Caraveo, P. A.
Cavazzuti, E.
Cecchi, C.
Cheung, C. C.
Chiang, J.
Chiaro, G.
Ciprini, S.
Cohen-Tanugi, J.
Costanza, F.
Cutini, S.
D’Ammando, F.
Palma, F. de
Desiante, R.
Digel, S. W.
Lalla, N. Di
Mauro, M. Di
Venere, L. Di
Drell, P. S.
Favuzzi, C.
Fegan, S. J.
Ferrara, E. C.
Fukazawa, Y.
Funk, S.
Fusco, P.
Gargano, F.
Gasparrini, D.
Giglietto, N.
Giordano, F.
Giroletti, M.
Grenier, I. A.
Guillemot, L.
Guiriec, S.
Hayashida, M.
Hays, E.
Horan, D.
Jóhannesson, G.
Kensei, S.
Kocevski, D.
Kuss, M.
Mura, G. La
Larsson, S.
Latronico, L.
Li, J.
Longo, F.
Loparco, F.
Lott, B.
Lovellette, M. N.
Lubrano, P.
Madejski, G. M.
Magill, J. D.
Maldera, S.
Manfreda, A.
Mayer, M.
Mazziotta, M. N.
Michelson, P. F.
Mirabal, N.
Mizuno, T.
Monzani, M. E.
Morselli, A.
Moskalenko, I. V.
Nalewajko, K.
Negro, M.
Nuss, E.
Ohsugi, T.
Orlando, E.
Paneque, D.
Perkins, J. S.
Pesce-Rollins, M.
Piron, F.
Pivato, G.
Porter, T. A.
Principe, G.
Rando, R.
Razzano, M.
Razzaque, S.
Reimer, A.
Scargle, J. D.
Sgrò, C.
Sikora, M.
Simone, D.
Siskind, E. J.
Spada, F.
Spinelli, P.
Stawarz, L.
Thayer, J. B.
Thompson, D. J.
Torres, D. F.
Troja, E.
Uchiyama, Y.
Yuan, Y.
Zimmer, S.
Ackermann, M.
Anantua, R.
Asano, K.
Baldini, L.
Barbiellini, G.
Bastieri, D.
Gonzalez, J. Becerra
Bellazzini, R.
Bissaldi, E.
Blandford, R. D.
Bloom, E. D.
Bonino, R.
Bottacini, E.
Bruel, P.
Buehler, R.
Caliandro, G. A.
Cameron, R. A.
Caragiulo, M.
Caraveo, P. A.
Cavazzuti, E.
Cecchi, C.
Cheung, C. C.
Chiang, J.
Chiaro, G.
Ciprini, S.
Cohen-Tanugi, J.
Costanza, F.
Cutini, S.
D’Ammando, F.
Palma, F. de
Desiante, R.
Digel, S. W.
Lalla, N. Di
Mauro, M. Di
Venere, L. Di
Drell, P. S.
Favuzzi, C.
Fegan, S. J.
Ferrara, E. C.
Fukazawa, Y.
Funk, S.
Fusco, P.
Gargano, F.
Gasparrini, D.
Giglietto, N.
Giordano, F.
Giroletti, M.
Grenier, I. A.
Guillemot, L.
Guiriec, S.
Hayashida, M.
Hays, E.
Horan, D.
Jóhannesson, G.
Kensei, S.
Kocevski, D.
Kuss, M.
Mura, G. La
Larsson, S.
Latronico, L.
Li, J.
Longo, F.
Loparco, F.
Lott, B.
Lovellette, M. N.
Lubrano, P.
Madejski, G. M.
Magill, J. D.
Maldera, S.
Manfreda, A.
Mayer, M.
Mazziotta, M. N.
Michelson, P. F.
Mirabal, N.
Mizuno, T.
Monzani, M. E.
Morselli, A.
Moskalenko, I. V.
Nalewajko, K.
Negro, M.
Nuss, E.
Ohsugi, T.
Orlando, E.
Paneque, D.
Perkins, J. S.
Pesce-Rollins, M.
Piron, F.
Pivato, G.
Porter, T. A.
Principe, G.
Rando, R.
Razzano, M.
Razzaque, S.
Reimer, A.
Scargle, J. D.
Sgrò, C.
Sikora, M.
Simone, D.
Siskind, E. J.
Spada, F.
Spinelli, P.
Stawarz, L.
Thayer, J. B.
Thompson, D. J.
Torres, D. F.
Troja, E.
Uchiyama, Y.
Yuan, Y.
Zimmer, S.
author Ackermann, M.
Anantua, R.
Asano, K.
Baldini, L.
Barbiellini, G.
Bastieri, D.
Gonzalez, J. Becerra
Bellazzini, R.
Bissaldi, E.
Blandford, R. D.
Bloom, E. D.
Bonino, R.
Bottacini, E.
Bruel, P.
Buehler, R.
Caliandro, G. A.
Cameron, R. A.
Caragiulo, M.
Caraveo, P. A.
Cavazzuti, E.
Cecchi, C.
Cheung, C. C.
Chiang, J.
Chiaro, G.
Ciprini, S.
Cohen-Tanugi, J.
Costanza, F.
Cutini, S.
D’Ammando, F.
Palma, F. de
Desiante, R.
Digel, S. W.
Lalla, N. Di
Mauro, M. Di
Venere, L. Di
Drell, P. S.
Favuzzi, C.
Fegan, S. J.
Ferrara, E. C.
Fukazawa, Y.
Funk, S.
Fusco, P.
Gargano, F.
Gasparrini, D.
Giglietto, N.
Giordano, F.
Giroletti, M.
Grenier, I. A.
Guillemot, L.
Guiriec, S.
Hayashida, M.
Hays, E.
Horan, D.
Jóhannesson, G.
Kensei, S.
Kocevski, D.
Kuss, M.
Mura, G. La
Larsson, S.
Latronico, L.
Li, J.
Longo, F.
Loparco, F.
Lott, B.
Lovellette, M. N.
Lubrano, P.
Madejski, G. M.
Magill, J. D.
Maldera, S.
Manfreda, A.
Mayer, M.
Mazziotta, M. N.
Michelson, P. F.
Mirabal, N.
Mizuno, T.
Monzani, M. E.
Morselli, A.
Moskalenko, I. V.
Nalewajko, K.
Negro, M.
Nuss, E.
Ohsugi, T.
Orlando, E.
Paneque, D.
Perkins, J. S.
Pesce-Rollins, M.
Piron, F.
Pivato, G.
Porter, T. A.
Principe, G.
Rando, R.
Razzano, M.
Razzaque, S.
Reimer, A.
Scargle, J. D.
Sgrò, C.
Sikora, M.
Simone, D.
Siskind, E. J.
Spada, F.
Spinelli, P.
Stawarz, L.
Thayer, J. B.
Thompson, D. J.
Torres, D. F.
Troja, E.
Uchiyama, Y.
Yuan, Y.
Zimmer, S.
spellingShingle Ackermann, M.
Anantua, R.
Asano, K.
Baldini, L.
Barbiellini, G.
Bastieri, D.
Gonzalez, J. Becerra
Bellazzini, R.
Bissaldi, E.
Blandford, R. D.
Bloom, E. D.
Bonino, R.
Bottacini, E.
Bruel, P.
Buehler, R.
Caliandro, G. A.
Cameron, R. A.
Caragiulo, M.
Caraveo, P. A.
Cavazzuti, E.
Cecchi, C.
Cheung, C. C.
Chiang, J.
Chiaro, G.
Ciprini, S.
Cohen-Tanugi, J.
Costanza, F.
Cutini, S.
D’Ammando, F.
Palma, F. de
Desiante, R.
Digel, S. W.
Lalla, N. Di
Mauro, M. Di
Venere, L. Di
Drell, P. S.
Favuzzi, C.
Fegan, S. J.
Ferrara, E. C.
Fukazawa, Y.
Funk, S.
Fusco, P.
Gargano, F.
Gasparrini, D.
Giglietto, N.
Giordano, F.
Giroletti, M.
Grenier, I. A.
Guillemot, L.
Guiriec, S.
Hayashida, M.
Hays, E.
Horan, D.
Jóhannesson, G.
Kensei, S.
Kocevski, D.
Kuss, M.
Mura, G. La
Larsson, S.
Latronico, L.
Li, J.
Longo, F.
Loparco, F.
Lott, B.
Lovellette, M. N.
Lubrano, P.
Madejski, G. M.
Magill, J. D.
Maldera, S.
Manfreda, A.
Mayer, M.
Mazziotta, M. N.
Michelson, P. F.
Mirabal, N.
Mizuno, T.
Monzani, M. E.
Morselli, A.
Moskalenko, I. V.
Nalewajko, K.
Negro, M.
Nuss, E.
Ohsugi, T.
Orlando, E.
Paneque, D.
Perkins, J. S.
Pesce-Rollins, M.
Piron, F.
Pivato, G.
Porter, T. A.
Principe, G.
Rando, R.
Razzano, M.
Razzaque, S.
Reimer, A.
Scargle, J. D.
Sgrò, C.
Sikora, M.
Simone, D.
Siskind, E. J.
Spada, F.
Spinelli, P.
Stawarz, L.
Thayer, J. B.
Thompson, D. J.
Torres, D. F.
Troja, E.
Uchiyama, Y.
Yuan, Y.
Zimmer, S.
The Astrophysical Journal Letters
MINUTE-TIMESCALE 100 MeV γ-RAY VARIABILITY DURING THE GIANT OUTBURST OF QUASAR 3C 279 OBSERVED BY FERMI-LAT IN 2015 JUNE
Space and Planetary Science
Astronomy and Astrophysics
author_sort ackermann, m.
spelling Ackermann, M. Anantua, R. Asano, K. Baldini, L. Barbiellini, G. Bastieri, D. Gonzalez, J. Becerra Bellazzini, R. Bissaldi, E. Blandford, R. D. Bloom, E. D. Bonino, R. Bottacini, E. Bruel, P. Buehler, R. Caliandro, G. A. Cameron, R. A. Caragiulo, M. Caraveo, P. A. Cavazzuti, E. Cecchi, C. Cheung, C. C. Chiang, J. Chiaro, G. Ciprini, S. Cohen-Tanugi, J. Costanza, F. Cutini, S. D’Ammando, F. Palma, F. de Desiante, R. Digel, S. W. Lalla, N. Di Mauro, M. Di Venere, L. Di Drell, P. S. Favuzzi, C. Fegan, S. J. Ferrara, E. C. Fukazawa, Y. Funk, S. Fusco, P. Gargano, F. Gasparrini, D. Giglietto, N. Giordano, F. Giroletti, M. Grenier, I. A. Guillemot, L. Guiriec, S. Hayashida, M. Hays, E. Horan, D. Jóhannesson, G. Kensei, S. Kocevski, D. Kuss, M. Mura, G. La Larsson, S. Latronico, L. Li, J. Longo, F. Loparco, F. Lott, B. Lovellette, M. N. Lubrano, P. Madejski, G. M. Magill, J. D. Maldera, S. Manfreda, A. Mayer, M. Mazziotta, M. N. Michelson, P. F. Mirabal, N. Mizuno, T. Monzani, M. E. Morselli, A. Moskalenko, I. V. Nalewajko, K. Negro, M. Nuss, E. Ohsugi, T. Orlando, E. Paneque, D. Perkins, J. S. Pesce-Rollins, M. Piron, F. Pivato, G. Porter, T. A. Principe, G. Rando, R. Razzano, M. Razzaque, S. Reimer, A. Scargle, J. D. Sgrò, C. Sikora, M. Simone, D. Siskind, E. J. Spada, F. Spinelli, P. Stawarz, L. Thayer, J. B. Thompson, D. J. Torres, D. F. Troja, E. Uchiyama, Y. Yuan, Y. Zimmer, S. 2041-8205 2041-8213 American Astronomical Society Space and Planetary Science Astronomy and Astrophysics http://dx.doi.org/10.3847/2041-8205/824/2/l20 <jats:title>ABSTRACT</jats:title> <jats:p>On 2015 June 16, <jats:italic>Fermi</jats:italic>-LAT observed a giant outburst from the flat spectrum radio quasar 3C 279 with a peak &gt;100 MeV flux of ∼3.6 × 10<jats:sup>−5</jats:sup> photons cm<jats:sup>−2</jats:sup> s<jats:sup>−1</jats:sup>, averaged over orbital period intervals. It is historically the highest <jats:italic>γ</jats:italic>-ray flux observed from the source, including past EGRET observations, with the <jats:italic>γ</jats:italic>-ray isotropic luminosity reaching ∼10<jats:sup>49</jats:sup> erg s<jats:sup>−1</jats:sup>. During the outburst, the <jats:italic>Fermi</jats:italic> spacecraft, which has an orbital period of 95.4 minutes, was operated in a special pointing mode to optimize the exposure for 3C 279. For the first time, significant flux variability at sub-orbital timescales was found in blazar observations by <jats:italic>Fermi</jats:italic>-LAT. The source flux variability was resolved down to 2-minute binned timescales, with flux doubling times of less than 5 minutes. The observed minute-scale variability suggests a very compact emission region at hundreds of Schwarzschild radii from the central engine in conical jet models. A minimum bulk jet Lorentz factor (Γ) of 35 is necessary to avoid both internal <jats:italic>γ</jats:italic>-ray absorption and super-Eddington jet power. In the standard external radiation Comptonization scenario, Γ should be at least 50 to avoid overproducing the synchrotron self-Compton component. However, this predicts extremely low magnetization (∼5 × 10<jats:sup>−4</jats:sup>). Equipartition requires Γ as high as 120, unless the emitting region is a small fraction of the dissipation region. Alternatively, we consider <jats:italic>γ</jats:italic> rays originating as synchrotron radiation of <jats:italic>γ</jats:italic> <jats:sub>e</jats:sub> ∼ 1.6 × 10<jats:sup>6</jats:sup> electrons, in a magnetic field <jats:italic>B</jats:italic> ∼ 1.3 kG, accelerated by strong electric fields <jats:italic>E</jats:italic> ∼ <jats:italic>B</jats:italic> in the process of magnetoluminescence. At such short distance scales, one cannot immediately exclude the production of <jats:italic>γ</jats:italic>-rays in hadronic processes.</jats:p> MINUTE-TIMESCALE >100 MeV γ-RAY VARIABILITY DURING THE GIANT OUTBURST OF QUASAR 3C 279 OBSERVED BY FERMI-LAT IN 2015 JUNE The Astrophysical Journal Letters
doi_str_mv 10.3847/2041-8205/824/2/l20
facet_avail Online
Free
finc_class_facet Physik
Technik
format ElectronicArticle
fullrecord blob:ai-49-aHR0cDovL2R4LmRvaS5vcmcvMTAuMzg0Ny8yMDQxLTgyMDUvODI0LzIvbDIw
id ai-49-aHR0cDovL2R4LmRvaS5vcmcvMTAuMzg0Ny8yMDQxLTgyMDUvODI0LzIvbDIw
institution DE-Gla1
DE-Zi4
DE-15
DE-Rs1
DE-Pl11
DE-105
DE-14
DE-Ch1
DE-L229
DE-D275
DE-Bn3
DE-Brt1
DE-Zwi2
DE-D161
imprint American Astronomical Society, 2016
imprint_str_mv American Astronomical Society, 2016
issn 2041-8213
2041-8205
issn_str_mv 2041-8213
2041-8205
language Undetermined
mega_collection American Astronomical Society (CrossRef)
match_str ackermann2016minutetimescale100mevgrayvariabilityduringthegiantoutburstofquasar3c279observedbyfermilatin2015june
publishDateSort 2016
publisher American Astronomical Society
recordtype ai
record_format ai
series The Astrophysical Journal Letters
source_id 49
title MINUTE-TIMESCALE 100 MeV γ-RAY VARIABILITY DURING THE GIANT OUTBURST OF QUASAR 3C 279 OBSERVED BY FERMI-LAT IN 2015 JUNE
title_unstemmed MINUTE-TIMESCALE 100 MeV γ-RAY VARIABILITY DURING THE GIANT OUTBURST OF QUASAR 3C 279 OBSERVED BY FERMI-LAT IN 2015 JUNE
title_full MINUTE-TIMESCALE 100 MeV γ-RAY VARIABILITY DURING THE GIANT OUTBURST OF QUASAR 3C 279 OBSERVED BY FERMI-LAT IN 2015 JUNE
title_fullStr MINUTE-TIMESCALE 100 MeV γ-RAY VARIABILITY DURING THE GIANT OUTBURST OF QUASAR 3C 279 OBSERVED BY FERMI-LAT IN 2015 JUNE
title_full_unstemmed MINUTE-TIMESCALE 100 MeV γ-RAY VARIABILITY DURING THE GIANT OUTBURST OF QUASAR 3C 279 OBSERVED BY FERMI-LAT IN 2015 JUNE
title_short MINUTE-TIMESCALE 100 MeV γ-RAY VARIABILITY DURING THE GIANT OUTBURST OF QUASAR 3C 279 OBSERVED BY FERMI-LAT IN 2015 JUNE
title_sort minute-timescale >100 mev γ-ray variability during the giant outburst of quasar 3c 279 observed by fermi-lat in 2015 june
topic Space and Planetary Science
Astronomy and Astrophysics
url http://dx.doi.org/10.3847/2041-8205/824/2/l20
publishDate 2016
physical L20
description <jats:title>ABSTRACT</jats:title> <jats:p>On 2015 June 16, <jats:italic>Fermi</jats:italic>-LAT observed a giant outburst from the flat spectrum radio quasar 3C 279 with a peak &gt;100 MeV flux of ∼3.6 × 10<jats:sup>−5</jats:sup> photons cm<jats:sup>−2</jats:sup> s<jats:sup>−1</jats:sup>, averaged over orbital period intervals. It is historically the highest <jats:italic>γ</jats:italic>-ray flux observed from the source, including past EGRET observations, with the <jats:italic>γ</jats:italic>-ray isotropic luminosity reaching ∼10<jats:sup>49</jats:sup> erg s<jats:sup>−1</jats:sup>. During the outburst, the <jats:italic>Fermi</jats:italic> spacecraft, which has an orbital period of 95.4 minutes, was operated in a special pointing mode to optimize the exposure for 3C 279. For the first time, significant flux variability at sub-orbital timescales was found in blazar observations by <jats:italic>Fermi</jats:italic>-LAT. The source flux variability was resolved down to 2-minute binned timescales, with flux doubling times of less than 5 minutes. The observed minute-scale variability suggests a very compact emission region at hundreds of Schwarzschild radii from the central engine in conical jet models. A minimum bulk jet Lorentz factor (Γ) of 35 is necessary to avoid both internal <jats:italic>γ</jats:italic>-ray absorption and super-Eddington jet power. In the standard external radiation Comptonization scenario, Γ should be at least 50 to avoid overproducing the synchrotron self-Compton component. However, this predicts extremely low magnetization (∼5 × 10<jats:sup>−4</jats:sup>). Equipartition requires Γ as high as 120, unless the emitting region is a small fraction of the dissipation region. Alternatively, we consider <jats:italic>γ</jats:italic> rays originating as synchrotron radiation of <jats:italic>γ</jats:italic> <jats:sub>e</jats:sub> ∼ 1.6 × 10<jats:sup>6</jats:sup> electrons, in a magnetic field <jats:italic>B</jats:italic> ∼ 1.3 kG, accelerated by strong electric fields <jats:italic>E</jats:italic> ∼ <jats:italic>B</jats:italic> in the process of magnetoluminescence. At such short distance scales, one cannot immediately exclude the production of <jats:italic>γ</jats:italic>-rays in hadronic processes.</jats:p>
container_issue 2
container_start_page 0
container_title The Astrophysical Journal Letters
container_volume 824
format_de105 Article, E-Article
format_de14 Article, E-Article
format_de15 Article, E-Article
format_de520 Article, E-Article
format_de540 Article, E-Article
format_dech1 Article, E-Article
format_ded117 Article, E-Article
format_degla1 E-Article
format_del152 Buch
format_del189 Article, E-Article
format_dezi4 Article
format_dezwi2 Article, E-Article
format_finc Article, E-Article
format_nrw Article, E-Article
_version_ 1792343303837974535
geogr_code not assigned
last_indexed 2024-03-01T16:49:33.43Z
geogr_code_person not assigned
openURL url_ver=Z39.88-2004&ctx_ver=Z39.88-2004&ctx_enc=info%3Aofi%2Fenc%3AUTF-8&rfr_id=info%3Asid%2Fvufind.svn.sourceforge.net%3Agenerator&rft.title=MINUTE-TIMESCALE+100+MeV+%CE%B3-RAY+VARIABILITY+DURING+THE+GIANT+OUTBURST+OF+QUASAR+3C+279+OBSERVED+BY+FERMI-LAT+IN+2015+JUNE&rft.date=2016-06-20&genre=article&issn=2041-8213&volume=824&issue=2&pages=L20&jtitle=The+Astrophysical+Journal+Letters&atitle=MINUTE-TIMESCALE+%3E100+MeV+%CE%B3-RAY+VARIABILITY+DURING+THE+GIANT+OUTBURST+OF+QUASAR+3C+279+OBSERVED+BY+FERMI-LAT+IN+2015+JUNE&aulast=Zimmer&aufirst=S.&rft_id=info%3Adoi%2F10.3847%2F2041-8205%2F824%2F2%2Fl20&rft.language%5B0%5D=und
SOLR
_version_ 1792343303837974535
author Ackermann, M., Anantua, R., Asano, K., Baldini, L., Barbiellini, G., Bastieri, D., Gonzalez, J. Becerra, Bellazzini, R., Bissaldi, E., Blandford, R. D., Bloom, E. D., Bonino, R., Bottacini, E., Bruel, P., Buehler, R., Caliandro, G. A., Cameron, R. A., Caragiulo, M., Caraveo, P. A., Cavazzuti, E., Cecchi, C., Cheung, C. C., Chiang, J., Chiaro, G., Ciprini, S., Cohen-Tanugi, J., Costanza, F., Cutini, S., D’Ammando, F., Palma, F. de, Desiante, R., Digel, S. W., Lalla, N. Di, Mauro, M. Di, Venere, L. Di, Drell, P. S., Favuzzi, C., Fegan, S. J., Ferrara, E. C., Fukazawa, Y., Funk, S., Fusco, P., Gargano, F., Gasparrini, D., Giglietto, N., Giordano, F., Giroletti, M., Grenier, I. A., Guillemot, L., Guiriec, S., Hayashida, M., Hays, E., Horan, D., Jóhannesson, G., Kensei, S., Kocevski, D., Kuss, M., Mura, G. La, Larsson, S., Latronico, L., Li, J., Longo, F., Loparco, F., Lott, B., Lovellette, M. N., Lubrano, P., Madejski, G. M., Magill, J. D., Maldera, S., Manfreda, A., Mayer, M., Mazziotta, M. N., Michelson, P. F., Mirabal, N., Mizuno, T., Monzani, M. E., Morselli, A., Moskalenko, I. V., Nalewajko, K., Negro, M., Nuss, E., Ohsugi, T., Orlando, E., Paneque, D., Perkins, J. S., Pesce-Rollins, M., Piron, F., Pivato, G., Porter, T. A., Principe, G., Rando, R., Razzano, M., Razzaque, S., Reimer, A., Scargle, J. D., Sgrò, C., Sikora, M., Simone, D., Siskind, E. J., Spada, F., Spinelli, P., Stawarz, L., Thayer, J. B., Thompson, D. J., Torres, D. F., Troja, E., Uchiyama, Y., Yuan, Y., Zimmer, S.
author_facet Ackermann, M., Anantua, R., Asano, K., Baldini, L., Barbiellini, G., Bastieri, D., Gonzalez, J. Becerra, Bellazzini, R., Bissaldi, E., Blandford, R. D., Bloom, E. D., Bonino, R., Bottacini, E., Bruel, P., Buehler, R., Caliandro, G. A., Cameron, R. A., Caragiulo, M., Caraveo, P. A., Cavazzuti, E., Cecchi, C., Cheung, C. C., Chiang, J., Chiaro, G., Ciprini, S., Cohen-Tanugi, J., Costanza, F., Cutini, S., D’Ammando, F., Palma, F. de, Desiante, R., Digel, S. W., Lalla, N. Di, Mauro, M. Di, Venere, L. Di, Drell, P. S., Favuzzi, C., Fegan, S. J., Ferrara, E. C., Fukazawa, Y., Funk, S., Fusco, P., Gargano, F., Gasparrini, D., Giglietto, N., Giordano, F., Giroletti, M., Grenier, I. A., Guillemot, L., Guiriec, S., Hayashida, M., Hays, E., Horan, D., Jóhannesson, G., Kensei, S., Kocevski, D., Kuss, M., Mura, G. La, Larsson, S., Latronico, L., Li, J., Longo, F., Loparco, F., Lott, B., Lovellette, M. N., Lubrano, P., Madejski, G. M., Magill, J. D., Maldera, S., Manfreda, A., Mayer, M., Mazziotta, M. N., Michelson, P. F., Mirabal, N., Mizuno, T., Monzani, M. E., Morselli, A., Moskalenko, I. V., Nalewajko, K., Negro, M., Nuss, E., Ohsugi, T., Orlando, E., Paneque, D., Perkins, J. S., Pesce-Rollins, M., Piron, F., Pivato, G., Porter, T. A., Principe, G., Rando, R., Razzano, M., Razzaque, S., Reimer, A., Scargle, J. D., Sgrò, C., Sikora, M., Simone, D., Siskind, E. J., Spada, F., Spinelli, P., Stawarz, L., Thayer, J. B., Thompson, D. J., Torres, D. F., Troja, E., Uchiyama, Y., Yuan, Y., Zimmer, S., Ackermann, M., Anantua, R., Asano, K., Baldini, L., Barbiellini, G., Bastieri, D., Gonzalez, J. Becerra, Bellazzini, R., Bissaldi, E., Blandford, R. D., Bloom, E. D., Bonino, R., Bottacini, E., Bruel, P., Buehler, R., Caliandro, G. A., Cameron, R. A., Caragiulo, M., Caraveo, P. A., Cavazzuti, E., Cecchi, C., Cheung, C. C., Chiang, J., Chiaro, G., Ciprini, S., Cohen-Tanugi, J., Costanza, F., Cutini, S., D’Ammando, F., Palma, F. de, Desiante, R., Digel, S. W., Lalla, N. Di, Mauro, M. Di, Venere, L. Di, Drell, P. S., Favuzzi, C., Fegan, S. J., Ferrara, E. C., Fukazawa, Y., Funk, S., Fusco, P., Gargano, F., Gasparrini, D., Giglietto, N., Giordano, F., Giroletti, M., Grenier, I. A., Guillemot, L., Guiriec, S., Hayashida, M., Hays, E., Horan, D., Jóhannesson, G., Kensei, S., Kocevski, D., Kuss, M., Mura, G. La, Larsson, S., Latronico, L., Li, J., Longo, F., Loparco, F., Lott, B., Lovellette, M. N., Lubrano, P., Madejski, G. M., Magill, J. D., Maldera, S., Manfreda, A., Mayer, M., Mazziotta, M. N., Michelson, P. F., Mirabal, N., Mizuno, T., Monzani, M. E., Morselli, A., Moskalenko, I. V., Nalewajko, K., Negro, M., Nuss, E., Ohsugi, T., Orlando, E., Paneque, D., Perkins, J. S., Pesce-Rollins, M., Piron, F., Pivato, G., Porter, T. A., Principe, G., Rando, R., Razzano, M., Razzaque, S., Reimer, A., Scargle, J. D., Sgrò, C., Sikora, M., Simone, D., Siskind, E. J., Spada, F., Spinelli, P., Stawarz, L., Thayer, J. B., Thompson, D. J., Torres, D. F., Troja, E., Uchiyama, Y., Yuan, Y., Zimmer, S.
author_sort ackermann, m.
container_issue 2
container_start_page 0
container_title The Astrophysical Journal Letters
container_volume 824
description <jats:title>ABSTRACT</jats:title> <jats:p>On 2015 June 16, <jats:italic>Fermi</jats:italic>-LAT observed a giant outburst from the flat spectrum radio quasar 3C 279 with a peak &gt;100 MeV flux of ∼3.6 × 10<jats:sup>−5</jats:sup> photons cm<jats:sup>−2</jats:sup> s<jats:sup>−1</jats:sup>, averaged over orbital period intervals. It is historically the highest <jats:italic>γ</jats:italic>-ray flux observed from the source, including past EGRET observations, with the <jats:italic>γ</jats:italic>-ray isotropic luminosity reaching ∼10<jats:sup>49</jats:sup> erg s<jats:sup>−1</jats:sup>. During the outburst, the <jats:italic>Fermi</jats:italic> spacecraft, which has an orbital period of 95.4 minutes, was operated in a special pointing mode to optimize the exposure for 3C 279. For the first time, significant flux variability at sub-orbital timescales was found in blazar observations by <jats:italic>Fermi</jats:italic>-LAT. The source flux variability was resolved down to 2-minute binned timescales, with flux doubling times of less than 5 minutes. The observed minute-scale variability suggests a very compact emission region at hundreds of Schwarzschild radii from the central engine in conical jet models. A minimum bulk jet Lorentz factor (Γ) of 35 is necessary to avoid both internal <jats:italic>γ</jats:italic>-ray absorption and super-Eddington jet power. In the standard external radiation Comptonization scenario, Γ should be at least 50 to avoid overproducing the synchrotron self-Compton component. However, this predicts extremely low magnetization (∼5 × 10<jats:sup>−4</jats:sup>). Equipartition requires Γ as high as 120, unless the emitting region is a small fraction of the dissipation region. Alternatively, we consider <jats:italic>γ</jats:italic> rays originating as synchrotron radiation of <jats:italic>γ</jats:italic> <jats:sub>e</jats:sub> ∼ 1.6 × 10<jats:sup>6</jats:sup> electrons, in a magnetic field <jats:italic>B</jats:italic> ∼ 1.3 kG, accelerated by strong electric fields <jats:italic>E</jats:italic> ∼ <jats:italic>B</jats:italic> in the process of magnetoluminescence. At such short distance scales, one cannot immediately exclude the production of <jats:italic>γ</jats:italic>-rays in hadronic processes.</jats:p>
doi_str_mv 10.3847/2041-8205/824/2/l20
facet_avail Online, Free
finc_class_facet Physik, Technik
format ElectronicArticle
format_de105 Article, E-Article
format_de14 Article, E-Article
format_de15 Article, E-Article
format_de520 Article, E-Article
format_de540 Article, E-Article
format_dech1 Article, E-Article
format_ded117 Article, E-Article
format_degla1 E-Article
format_del152 Buch
format_del189 Article, E-Article
format_dezi4 Article
format_dezwi2 Article, E-Article
format_finc Article, E-Article
format_nrw Article, E-Article
geogr_code not assigned
geogr_code_person not assigned
id ai-49-aHR0cDovL2R4LmRvaS5vcmcvMTAuMzg0Ny8yMDQxLTgyMDUvODI0LzIvbDIw
imprint American Astronomical Society, 2016
imprint_str_mv American Astronomical Society, 2016
institution DE-Gla1, DE-Zi4, DE-15, DE-Rs1, DE-Pl11, DE-105, DE-14, DE-Ch1, DE-L229, DE-D275, DE-Bn3, DE-Brt1, DE-Zwi2, DE-D161
issn 2041-8213, 2041-8205
issn_str_mv 2041-8213, 2041-8205
language Undetermined
last_indexed 2024-03-01T16:49:33.43Z
match_str ackermann2016minutetimescale100mevgrayvariabilityduringthegiantoutburstofquasar3c279observedbyfermilatin2015june
mega_collection American Astronomical Society (CrossRef)
physical L20
publishDate 2016
publishDateSort 2016
publisher American Astronomical Society
record_format ai
recordtype ai
series The Astrophysical Journal Letters
source_id 49
spelling Ackermann, M. Anantua, R. Asano, K. Baldini, L. Barbiellini, G. Bastieri, D. Gonzalez, J. Becerra Bellazzini, R. Bissaldi, E. Blandford, R. D. Bloom, E. D. Bonino, R. Bottacini, E. Bruel, P. Buehler, R. Caliandro, G. A. Cameron, R. A. Caragiulo, M. Caraveo, P. A. Cavazzuti, E. Cecchi, C. Cheung, C. C. Chiang, J. Chiaro, G. Ciprini, S. Cohen-Tanugi, J. Costanza, F. Cutini, S. D’Ammando, F. Palma, F. de Desiante, R. Digel, S. W. Lalla, N. Di Mauro, M. Di Venere, L. Di Drell, P. S. Favuzzi, C. Fegan, S. J. Ferrara, E. C. Fukazawa, Y. Funk, S. Fusco, P. Gargano, F. Gasparrini, D. Giglietto, N. Giordano, F. Giroletti, M. Grenier, I. A. Guillemot, L. Guiriec, S. Hayashida, M. Hays, E. Horan, D. Jóhannesson, G. Kensei, S. Kocevski, D. Kuss, M. Mura, G. La Larsson, S. Latronico, L. Li, J. Longo, F. Loparco, F. Lott, B. Lovellette, M. N. Lubrano, P. Madejski, G. M. Magill, J. D. Maldera, S. Manfreda, A. Mayer, M. Mazziotta, M. N. Michelson, P. F. Mirabal, N. Mizuno, T. Monzani, M. E. Morselli, A. Moskalenko, I. V. Nalewajko, K. Negro, M. Nuss, E. Ohsugi, T. Orlando, E. Paneque, D. Perkins, J. S. Pesce-Rollins, M. Piron, F. Pivato, G. Porter, T. A. Principe, G. Rando, R. Razzano, M. Razzaque, S. Reimer, A. Scargle, J. D. Sgrò, C. Sikora, M. Simone, D. Siskind, E. J. Spada, F. Spinelli, P. Stawarz, L. Thayer, J. B. Thompson, D. J. Torres, D. F. Troja, E. Uchiyama, Y. Yuan, Y. Zimmer, S. 2041-8205 2041-8213 American Astronomical Society Space and Planetary Science Astronomy and Astrophysics http://dx.doi.org/10.3847/2041-8205/824/2/l20 <jats:title>ABSTRACT</jats:title> <jats:p>On 2015 June 16, <jats:italic>Fermi</jats:italic>-LAT observed a giant outburst from the flat spectrum radio quasar 3C 279 with a peak &gt;100 MeV flux of ∼3.6 × 10<jats:sup>−5</jats:sup> photons cm<jats:sup>−2</jats:sup> s<jats:sup>−1</jats:sup>, averaged over orbital period intervals. It is historically the highest <jats:italic>γ</jats:italic>-ray flux observed from the source, including past EGRET observations, with the <jats:italic>γ</jats:italic>-ray isotropic luminosity reaching ∼10<jats:sup>49</jats:sup> erg s<jats:sup>−1</jats:sup>. During the outburst, the <jats:italic>Fermi</jats:italic> spacecraft, which has an orbital period of 95.4 minutes, was operated in a special pointing mode to optimize the exposure for 3C 279. For the first time, significant flux variability at sub-orbital timescales was found in blazar observations by <jats:italic>Fermi</jats:italic>-LAT. The source flux variability was resolved down to 2-minute binned timescales, with flux doubling times of less than 5 minutes. The observed minute-scale variability suggests a very compact emission region at hundreds of Schwarzschild radii from the central engine in conical jet models. A minimum bulk jet Lorentz factor (Γ) of 35 is necessary to avoid both internal <jats:italic>γ</jats:italic>-ray absorption and super-Eddington jet power. In the standard external radiation Comptonization scenario, Γ should be at least 50 to avoid overproducing the synchrotron self-Compton component. However, this predicts extremely low magnetization (∼5 × 10<jats:sup>−4</jats:sup>). Equipartition requires Γ as high as 120, unless the emitting region is a small fraction of the dissipation region. Alternatively, we consider <jats:italic>γ</jats:italic> rays originating as synchrotron radiation of <jats:italic>γ</jats:italic> <jats:sub>e</jats:sub> ∼ 1.6 × 10<jats:sup>6</jats:sup> electrons, in a magnetic field <jats:italic>B</jats:italic> ∼ 1.3 kG, accelerated by strong electric fields <jats:italic>E</jats:italic> ∼ <jats:italic>B</jats:italic> in the process of magnetoluminescence. At such short distance scales, one cannot immediately exclude the production of <jats:italic>γ</jats:italic>-rays in hadronic processes.</jats:p> MINUTE-TIMESCALE >100 MeV γ-RAY VARIABILITY DURING THE GIANT OUTBURST OF QUASAR 3C 279 OBSERVED BY FERMI-LAT IN 2015 JUNE The Astrophysical Journal Letters
spellingShingle Ackermann, M., Anantua, R., Asano, K., Baldini, L., Barbiellini, G., Bastieri, D., Gonzalez, J. Becerra, Bellazzini, R., Bissaldi, E., Blandford, R. D., Bloom, E. D., Bonino, R., Bottacini, E., Bruel, P., Buehler, R., Caliandro, G. A., Cameron, R. A., Caragiulo, M., Caraveo, P. A., Cavazzuti, E., Cecchi, C., Cheung, C. C., Chiang, J., Chiaro, G., Ciprini, S., Cohen-Tanugi, J., Costanza, F., Cutini, S., D’Ammando, F., Palma, F. de, Desiante, R., Digel, S. W., Lalla, N. Di, Mauro, M. Di, Venere, L. Di, Drell, P. S., Favuzzi, C., Fegan, S. J., Ferrara, E. C., Fukazawa, Y., Funk, S., Fusco, P., Gargano, F., Gasparrini, D., Giglietto, N., Giordano, F., Giroletti, M., Grenier, I. A., Guillemot, L., Guiriec, S., Hayashida, M., Hays, E., Horan, D., Jóhannesson, G., Kensei, S., Kocevski, D., Kuss, M., Mura, G. La, Larsson, S., Latronico, L., Li, J., Longo, F., Loparco, F., Lott, B., Lovellette, M. N., Lubrano, P., Madejski, G. M., Magill, J. D., Maldera, S., Manfreda, A., Mayer, M., Mazziotta, M. N., Michelson, P. F., Mirabal, N., Mizuno, T., Monzani, M. E., Morselli, A., Moskalenko, I. V., Nalewajko, K., Negro, M., Nuss, E., Ohsugi, T., Orlando, E., Paneque, D., Perkins, J. S., Pesce-Rollins, M., Piron, F., Pivato, G., Porter, T. A., Principe, G., Rando, R., Razzano, M., Razzaque, S., Reimer, A., Scargle, J. D., Sgrò, C., Sikora, M., Simone, D., Siskind, E. J., Spada, F., Spinelli, P., Stawarz, L., Thayer, J. B., Thompson, D. J., Torres, D. F., Troja, E., Uchiyama, Y., Yuan, Y., Zimmer, S., The Astrophysical Journal Letters, MINUTE-TIMESCALE 100 MeV γ-RAY VARIABILITY DURING THE GIANT OUTBURST OF QUASAR 3C 279 OBSERVED BY FERMI-LAT IN 2015 JUNE, Space and Planetary Science, Astronomy and Astrophysics
title MINUTE-TIMESCALE 100 MeV γ-RAY VARIABILITY DURING THE GIANT OUTBURST OF QUASAR 3C 279 OBSERVED BY FERMI-LAT IN 2015 JUNE
title_full MINUTE-TIMESCALE 100 MeV γ-RAY VARIABILITY DURING THE GIANT OUTBURST OF QUASAR 3C 279 OBSERVED BY FERMI-LAT IN 2015 JUNE
title_fullStr MINUTE-TIMESCALE 100 MeV γ-RAY VARIABILITY DURING THE GIANT OUTBURST OF QUASAR 3C 279 OBSERVED BY FERMI-LAT IN 2015 JUNE
title_full_unstemmed MINUTE-TIMESCALE 100 MeV γ-RAY VARIABILITY DURING THE GIANT OUTBURST OF QUASAR 3C 279 OBSERVED BY FERMI-LAT IN 2015 JUNE
title_short MINUTE-TIMESCALE 100 MeV γ-RAY VARIABILITY DURING THE GIANT OUTBURST OF QUASAR 3C 279 OBSERVED BY FERMI-LAT IN 2015 JUNE
title_sort minute-timescale >100 mev γ-ray variability during the giant outburst of quasar 3c 279 observed by fermi-lat in 2015 june
title_unstemmed MINUTE-TIMESCALE 100 MeV γ-RAY VARIABILITY DURING THE GIANT OUTBURST OF QUASAR 3C 279 OBSERVED BY FERMI-LAT IN 2015 JUNE
topic Space and Planetary Science, Astronomy and Astrophysics
url http://dx.doi.org/10.3847/2041-8205/824/2/l20