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Coordinated multiwavelength observations of BL Lacertae in 2000. / Böttcher, M.; Marscher, A. P.; Ravasio, M.; Villata, M.; Raiteri, C. M.; Aller, H. D.; Aller, M. F.; Teräsranta, H.; Mang, O.; Tagliaferri, G.; Aharonian, F.; Krawczynski, H.; Kurtanidze, O. M.; Nikolashvili, M. G.; Ibrahimov, M. A.; Papadakis, I. E.; Tsinganos, K.; Sadakane, K.; Okada, N.; Takalo, L. O.; Sillanpää, A.; Tosti, G.; Ciprini, S.; Frasca, A.; Marilli, E.; Robb, R.; Noble, J. C.; Jorstad, S. G.; Hagen-Thorn, V. A.; Larionov, V. M.; Nesci, R.; Maesano, M.; Schwartz, R. D.; Basler, J.; Gorham, P. W.; Iwamatsu, H.; Kato, T.; Pullen, C.; Benítez, E.; De Diego, J. A.; Moilanen, M.; Oksanen, A.; Rodriguez, D.; Sadun, A. C.; Kelly, M.; Carini, M. T.; Miller, H. R.; Catalano, S.; Dultzin-Hacyan, D.; Fan, J. H.; Ghisellini, G.; Ishioka, R.; Karttunen, H.; Keinänen, P.; Kudryavtseva, N. A.; Lainela, M.; Lanteri, L.; Larionova, E. G.; Matsumoto, K.; Mattox, J. R.; McHardy, I.; Montagni, F.; Nucciarelli, G.; Ostorero, L.; Papamastorakis, J.; Pasanen, M.; Sobrito, G.; Uemura, M.

в: Astrophysical Journal, Том 596, № 2 I, 20.10.2003, стр. 847-859.

Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование

Harvard

Böttcher, M, Marscher, AP, Ravasio, M, Villata, M, Raiteri, CM, Aller, HD, Aller, MF, Teräsranta, H, Mang, O, Tagliaferri, G, Aharonian, F, Krawczynski, H, Kurtanidze, OM, Nikolashvili, MG, Ibrahimov, MA, Papadakis, IE, Tsinganos, K, Sadakane, K, Okada, N, Takalo, LO, Sillanpää, A, Tosti, G, Ciprini, S, Frasca, A, Marilli, E, Robb, R, Noble, JC, Jorstad, SG, Hagen-Thorn, VA, Larionov, VM, Nesci, R, Maesano, M, Schwartz, RD, Basler, J, Gorham, PW, Iwamatsu, H, Kato, T, Pullen, C, Benítez, E, De Diego, JA, Moilanen, M, Oksanen, A, Rodriguez, D, Sadun, AC, Kelly, M, Carini, MT, Miller, HR, Catalano, S, Dultzin-Hacyan, D, Fan, JH, Ghisellini, G, Ishioka, R, Karttunen, H, Keinänen, P, Kudryavtseva, NA, Lainela, M, Lanteri, L, Larionova, EG, Matsumoto, K, Mattox, JR, McHardy, I, Montagni, F, Nucciarelli, G, Ostorero, L, Papamastorakis, J, Pasanen, M, Sobrito, G & Uemura, M 2003, 'Coordinated multiwavelength observations of BL Lacertae in 2000', Astrophysical Journal, Том. 596, № 2 I, стр. 847-859. https://doi.org/10.1086/378156

APA

Böttcher, M., Marscher, A. P., Ravasio, M., Villata, M., Raiteri, C. M., Aller, H. D., Aller, M. F., Teräsranta, H., Mang, O., Tagliaferri, G., Aharonian, F., Krawczynski, H., Kurtanidze, O. M., Nikolashvili, M. G., Ibrahimov, M. A., Papadakis, I. E., Tsinganos, K., Sadakane, K., Okada, N., ... Uemura, M. (2003). Coordinated multiwavelength observations of BL Lacertae in 2000. Astrophysical Journal, 596(2 I), 847-859. https://doi.org/10.1086/378156

Vancouver

Böttcher M, Marscher AP, Ravasio M, Villata M, Raiteri CM, Aller HD и пр. Coordinated multiwavelength observations of BL Lacertae in 2000. Astrophysical Journal. 2003 Окт. 20;596(2 I):847-859. https://doi.org/10.1086/378156

Author

Böttcher, M. ; Marscher, A. P. ; Ravasio, M. ; Villata, M. ; Raiteri, C. M. ; Aller, H. D. ; Aller, M. F. ; Teräsranta, H. ; Mang, O. ; Tagliaferri, G. ; Aharonian, F. ; Krawczynski, H. ; Kurtanidze, O. M. ; Nikolashvili, M. G. ; Ibrahimov, M. A. ; Papadakis, I. E. ; Tsinganos, K. ; Sadakane, K. ; Okada, N. ; Takalo, L. O. ; Sillanpää, A. ; Tosti, G. ; Ciprini, S. ; Frasca, A. ; Marilli, E. ; Robb, R. ; Noble, J. C. ; Jorstad, S. G. ; Hagen-Thorn, V. A. ; Larionov, V. M. ; Nesci, R. ; Maesano, M. ; Schwartz, R. D. ; Basler, J. ; Gorham, P. W. ; Iwamatsu, H. ; Kato, T. ; Pullen, C. ; Benítez, E. ; De Diego, J. A. ; Moilanen, M. ; Oksanen, A. ; Rodriguez, D. ; Sadun, A. C. ; Kelly, M. ; Carini, M. T. ; Miller, H. R. ; Catalano, S. ; Dultzin-Hacyan, D. ; Fan, J. H. ; Ghisellini, G. ; Ishioka, R. ; Karttunen, H. ; Keinänen, P. ; Kudryavtseva, N. A. ; Lainela, M. ; Lanteri, L. ; Larionova, E. G. ; Matsumoto, K. ; Mattox, J. R. ; McHardy, I. ; Montagni, F. ; Nucciarelli, G. ; Ostorero, L. ; Papamastorakis, J. ; Pasanen, M. ; Sobrito, G. ; Uemura, M. / Coordinated multiwavelength observations of BL Lacertae in 2000. в: Astrophysical Journal. 2003 ; Том 596, № 2 I. стр. 847-859.

BibTeX

@article{4763d25e57944d32b15fb2e16cd1782e,
title = "Coordinated multiwavelength observations of BL Lacertae in 2000",
abstract = "BL Lacertae (BL Lac) was the target of an extensive multiwavelength monitoring campaign in the second half of 2000. Simultaneous or quasi-simultaneous observations were taken at radio (University of Michigan Radio Astronomy Observatory and Mets{\"a}hovi Radio Telescope) and optical (Whole Earth Blazar Telescope [WEBT] collaboration) frequencies, in X-rays (BeppoSAX and RXTE), and at very high energy gamma rays (HEGRA). The WEBT optical campaign achieved an unprecedented time coverage, virtually continuous over several 10-20 hr segments. It revealed intraday variability on timescales of ∼1.5 hr and evidence for spectral hardening associated with increasing optical flux. During the campaign, BL Lac underwent a major transition from a rather quiescent state prior to 2000 September, to a flaring state for the rest of the year. This was also evident in the X-ray activity of the source. BeppoSAX observations on July 26-27 revealed a rather low X-ray flux and a hard spectrum, while a BeppoSAX pointing on 2000 October 31-November 2 indicated significant variability on timescales of ∼a few hours and provided evidence for the synchrotron spectrum extending out to ∼10 keV during that time. During the July 26-27 observation, there is a tantalizing, although not statistically significant, indication of a time delay of ∼4-5 hr between the BeppoSAX and the R-band light curves. Also, a low-significance detection of a time delay of 15 days between the 14.5 and 22 GHz radio light curves is reported. Several independent methods to estimate the comoving magnetic field in the source are presented, suggesting a value of ∼2eB 2/7 G, where eB is the magnetic field equipartition factor with respect to the electron energy density in the jet.",
keywords = "BL Lacertae objects: individual (BL Lacertae), Galaxies: active, Gamma rays: theory, Radiation mechanisms: nonthermal",
author = "M. B{\"o}ttcher and Marscher, {A. P.} and M. Ravasio and M. Villata and Raiteri, {C. M.} and Aller, {H. D.} and Aller, {M. F.} and H. Ter{\"a}sranta and O. Mang and G. Tagliaferri and F. Aharonian and H. Krawczynski and Kurtanidze, {O. M.} and Nikolashvili, {M. G.} and Ibrahimov, {M. A.} and Papadakis, {I. E.} and K. Tsinganos and K. Sadakane and N. Okada and Takalo, {L. O.} and A. Sillanp{\"a}{\"a} and G. Tosti and S. Ciprini and A. Frasca and E. Marilli and R. Robb and Noble, {J. C.} and Jorstad, {S. G.} and Hagen-Thorn, {V. A.} and Larionov, {V. M.} and R. Nesci and M. Maesano and Schwartz, {R. D.} and J. Basler and Gorham, {P. W.} and H. Iwamatsu and T. Kato and C. Pullen and E. Ben{\'i}tez and {De Diego}, {J. A.} and M. Moilanen and A. Oksanen and D. Rodriguez and Sadun, {A. C.} and M. Kelly and Carini, {M. T.} and Miller, {H. R.} and S. Catalano and D. Dultzin-Hacyan and Fan, {J. H.} and G. Ghisellini and R. Ishioka and H. Karttunen and P. Kein{\"a}nen and Kudryavtseva, {N. A.} and M. Lainela and L. Lanteri and Larionova, {E. G.} and K. Matsumoto and Mattox, {J. R.} and I. McHardy and F. Montagni and G. Nucciarelli and L. Ostorero and J. Papamastorakis and M. Pasanen and G. Sobrito and M. Uemura",
year = "2003",
month = oct,
day = "20",
doi = "10.1086/378156",
language = "English",
volume = "596",
pages = "847--859",
journal = "Astrophysical Journal",
issn = "0004-637X",
publisher = "IOP Publishing Ltd.",
number = "2 I",

}

RIS

TY - JOUR

T1 - Coordinated multiwavelength observations of BL Lacertae in 2000

AU - Böttcher, M.

AU - Marscher, A. P.

AU - Ravasio, M.

AU - Villata, M.

AU - Raiteri, C. M.

AU - Aller, H. D.

AU - Aller, M. F.

AU - Teräsranta, H.

AU - Mang, O.

AU - Tagliaferri, G.

AU - Aharonian, F.

AU - Krawczynski, H.

AU - Kurtanidze, O. M.

AU - Nikolashvili, M. G.

AU - Ibrahimov, M. A.

AU - Papadakis, I. E.

AU - Tsinganos, K.

AU - Sadakane, K.

AU - Okada, N.

AU - Takalo, L. O.

AU - Sillanpää, A.

AU - Tosti, G.

AU - Ciprini, S.

AU - Frasca, A.

AU - Marilli, E.

AU - Robb, R.

AU - Noble, J. C.

AU - Jorstad, S. G.

AU - Hagen-Thorn, V. A.

AU - Larionov, V. M.

AU - Nesci, R.

AU - Maesano, M.

AU - Schwartz, R. D.

AU - Basler, J.

AU - Gorham, P. W.

AU - Iwamatsu, H.

AU - Kato, T.

AU - Pullen, C.

AU - Benítez, E.

AU - De Diego, J. A.

AU - Moilanen, M.

AU - Oksanen, A.

AU - Rodriguez, D.

AU - Sadun, A. C.

AU - Kelly, M.

AU - Carini, M. T.

AU - Miller, H. R.

AU - Catalano, S.

AU - Dultzin-Hacyan, D.

AU - Fan, J. H.

AU - Ghisellini, G.

AU - Ishioka, R.

AU - Karttunen, H.

AU - Keinänen, P.

AU - Kudryavtseva, N. A.

AU - Lainela, M.

AU - Lanteri, L.

AU - Larionova, E. G.

AU - Matsumoto, K.

AU - Mattox, J. R.

AU - McHardy, I.

AU - Montagni, F.

AU - Nucciarelli, G.

AU - Ostorero, L.

AU - Papamastorakis, J.

AU - Pasanen, M.

AU - Sobrito, G.

AU - Uemura, M.

PY - 2003/10/20

Y1 - 2003/10/20

N2 - BL Lacertae (BL Lac) was the target of an extensive multiwavelength monitoring campaign in the second half of 2000. Simultaneous or quasi-simultaneous observations were taken at radio (University of Michigan Radio Astronomy Observatory and Metsähovi Radio Telescope) and optical (Whole Earth Blazar Telescope [WEBT] collaboration) frequencies, in X-rays (BeppoSAX and RXTE), and at very high energy gamma rays (HEGRA). The WEBT optical campaign achieved an unprecedented time coverage, virtually continuous over several 10-20 hr segments. It revealed intraday variability on timescales of ∼1.5 hr and evidence for spectral hardening associated with increasing optical flux. During the campaign, BL Lac underwent a major transition from a rather quiescent state prior to 2000 September, to a flaring state for the rest of the year. This was also evident in the X-ray activity of the source. BeppoSAX observations on July 26-27 revealed a rather low X-ray flux and a hard spectrum, while a BeppoSAX pointing on 2000 October 31-November 2 indicated significant variability on timescales of ∼a few hours and provided evidence for the synchrotron spectrum extending out to ∼10 keV during that time. During the July 26-27 observation, there is a tantalizing, although not statistically significant, indication of a time delay of ∼4-5 hr between the BeppoSAX and the R-band light curves. Also, a low-significance detection of a time delay of 15 days between the 14.5 and 22 GHz radio light curves is reported. Several independent methods to estimate the comoving magnetic field in the source are presented, suggesting a value of ∼2eB 2/7 G, where eB is the magnetic field equipartition factor with respect to the electron energy density in the jet.

AB - BL Lacertae (BL Lac) was the target of an extensive multiwavelength monitoring campaign in the second half of 2000. Simultaneous or quasi-simultaneous observations were taken at radio (University of Michigan Radio Astronomy Observatory and Metsähovi Radio Telescope) and optical (Whole Earth Blazar Telescope [WEBT] collaboration) frequencies, in X-rays (BeppoSAX and RXTE), and at very high energy gamma rays (HEGRA). The WEBT optical campaign achieved an unprecedented time coverage, virtually continuous over several 10-20 hr segments. It revealed intraday variability on timescales of ∼1.5 hr and evidence for spectral hardening associated with increasing optical flux. During the campaign, BL Lac underwent a major transition from a rather quiescent state prior to 2000 September, to a flaring state for the rest of the year. This was also evident in the X-ray activity of the source. BeppoSAX observations on July 26-27 revealed a rather low X-ray flux and a hard spectrum, while a BeppoSAX pointing on 2000 October 31-November 2 indicated significant variability on timescales of ∼a few hours and provided evidence for the synchrotron spectrum extending out to ∼10 keV during that time. During the July 26-27 observation, there is a tantalizing, although not statistically significant, indication of a time delay of ∼4-5 hr between the BeppoSAX and the R-band light curves. Also, a low-significance detection of a time delay of 15 days between the 14.5 and 22 GHz radio light curves is reported. Several independent methods to estimate the comoving magnetic field in the source are presented, suggesting a value of ∼2eB 2/7 G, where eB is the magnetic field equipartition factor with respect to the electron energy density in the jet.

KW - BL Lacertae objects: individual (BL Lacertae)

KW - Galaxies: active

KW - Gamma rays: theory

KW - Radiation mechanisms: nonthermal

UR - http://www.scopus.com/inward/record.url?scp=0242287367&partnerID=8YFLogxK

U2 - 10.1086/378156

DO - 10.1086/378156

M3 - Article

VL - 596

SP - 847

EP - 859

JO - Astrophysical Journal

JF - Astrophysical Journal

SN - 0004-637X

IS - 2 I

ER -

ID: 17061698