Detailed multifrequency studies of the high-frequency-peaked bl lac object 1es 1011+496 in 2011 and 2012

FOR THE MOJAVE COLLABORATION; FOR THE OVRO COLLABORATION; FOR THE METSÄHOVI RADIO OBSERVATORY; FOR THE MAGIC COLLABORATION; FOR THE Fermi COLLABORATION

Detailed multifrequency studies of the high-frequency-peaked bl lac object 1es 1011+496 in 2011 and 2012

FOR THE MOJAVE COLLABORATION, FOR THE OVRO COLLABORATION, FOR THE METSÄHOVI RADIO OBSERVATORY, FOR THE MAGIC COLLABORATION, FOR THE Fermi COLLABORATION

Department of Physics

Research output: Chapter or section in a book/report/conference proceeding › Chapter in a published conference proceeding

Abstract

We present multiwavelength (MWL) observations of the high-frequency-peaked BL Lac object 1ES 1011+496 (z = 0.212 [1]), based on very high energy (VHE, E > 100 GeV) observations performed with the stereoscopic system of MAGIC in 2011 and 2012. The system, located on La Palma, Canary Islands, Spain, consists of two 17 m diameter imaging Cherenkov telescopes allowing measurements down to a threshold as low as 50 GeV. While VHE observations in 2011 yielded a barely significant detection, 1ES 1011+496 was clearly detected in 2012 by MAGIC allowing a detailed measure of the differential spectrum. During both years the flux level above 150 GeV was compatible to that previously observed by MAGIC in this energy regime, and the source did not show any statistically significant variability in VHE γ-rays. Complementary MWL campaigns during previous VHE observations with MAGIC performed in mono mode, were lacking high energy (HE, E < 100 GeV) detection to cover the second peak of the spectral energy distribution (SED). The observations presented here provide a more precise determination of the SED which are reproduced with a one-zone Synchrotron-Self Compton (SSC) model. In particular, the inverse Compton (IC) peak is well constrained for the first time by the simultaneous coverage in HE and VHE γ-rays by Fermi-LAT and MAGIC. In addition, the results of optical polarimetric studies performed in 2012 will be shown in combination with multiepoch radio maps.

Original language	English
Title of host publication	Proceedings of the 33rd International Cosmic Rays Conference, ICRC 2013
Publisher	Sociedade Brasileira de Fisica
ISBN (Electronic)	9788589064293
Publication status	Published - 1 Jan 2013
Event	33rd International Cosmic Rays Conference, ICRC 2013 - Rio de Janeiro, Brazil Duration: 2 Jul 2013 → 9 Jul 2013

Publication series

Name	Proceedings of the 33rd International Cosmic Rays Conference, ICRC 2013
Volume	2013-October

Conference

Conference	33rd International Cosmic Rays Conference, ICRC 2013
Country/Territory	Brazil
City	Rio de Janeiro
Period	2/07/13 → 9/07/13

Funding

Acknowledgment: We would like to thank the Instituto de Astrofísica de Canarias for the excellent working conditions at the Observatorio del Roque de los Muchachos in La Palma. The support of the German BMBF and MPG, the Italian INFN, the Swiss National Fund SNF, and the Spanish MICINN is gratefully acknowledged. This work was also supported by the Marie Curie program, by the CPAN CSD2007-00042 and MultiDark CSD2009-00064 projects of the Spanish Consolider-Ingenio 2010 programme, by grant DO02-353 of the Bulgarian NSF, by grant 127740 of the Academy of Finland, by the YIP of the HelmholtzGemeinschaft, bytheDFGClusterof Excellence “Origin and Structure of the Universe”, by the DFG Collaborative Research Centers SFB823/C4 and SFB876/C3, and by the Polish MNiSzW grant 745/N-HESS-MAGIC/2010/0. The Fermi LAT Collaboration acknowledges support from a number of agencies and institutes for both development and the operation of the LAT as well as scientific data analysis. These include NASA and DOE in the United States, CEA/Irfu and IN2P3/CNRS in France, ASI and INFN in Italy, MEXT, KEK, and JAXA in Japan, and the K. A. Wallenberg Foundation, the Swedish Research Council and the National Space Board in Sweden. Additional support from INAF in Italy and CNES in France for science analysis during the operations phase is also gratefully acknowledged. The OVRO 40-m monitoring program is supported in part by NASA grants NNX08AW31G and NNX11A043G, and NSF grants AST-0808050 and AST-1109911. The MOJAVE project is supported under NASA-Fermi grants NNX08AV67G and 11-Fermi11-0019.

Keywords

1ES 1011+496
AGNs
BL Lac objects
MAGIC
Multiwavelength campaigns
VHE γ-rays

ASJC Scopus subject areas

Nuclear and High Energy Physics

Cite this

FOR THE MOJAVE COLLABORATION, FOR THE OVRO COLLABORATION, FOR THE METSÄHOVI RADIO OBSERVATORY, FOR THE MAGIC COLLABORATION, & FOR THE Fermi COLLABORATION (2013). Detailed multifrequency studies of the high-frequency-peaked bl lac object 1es 1011+496 in 2011 and 2012. In Proceedings of the 33rd International Cosmic Rays Conference, ICRC 2013 (Proceedings of the 33rd International Cosmic Rays Conference, ICRC 2013; Vol. 2013-October). Sociedade Brasileira de Fisica.

Detailed multifrequency studies of the high-frequency-peaked bl lac object 1es 1011+496 in 2011 and 2012. / FOR THE MOJAVE COLLABORATION; FOR THE OVRO COLLABORATION; FOR THE METSÄHOVI RADIO OBSERVATORY et al.
Proceedings of the 33rd International Cosmic Rays Conference, ICRC 2013. Sociedade Brasileira de Fisica, 2013. (Proceedings of the 33rd International Cosmic Rays Conference, ICRC 2013; Vol. 2013-October).

Research output: Chapter or section in a book/report/conference proceeding › Chapter in a published conference proceeding

FOR THE MOJAVE COLLABORATION, FOR THE OVRO COLLABORATION, FOR THE METSÄHOVI RADIO OBSERVATORY, FOR THE MAGIC COLLABORATION & FOR THE Fermi COLLABORATION 2013, Detailed multifrequency studies of the high-frequency-peaked bl lac object 1es 1011+496 in 2011 and 2012. in Proceedings of the 33rd International Cosmic Rays Conference, ICRC 2013. Proceedings of the 33rd International Cosmic Rays Conference, ICRC 2013, vol. 2013-October, Sociedade Brasileira de Fisica, 33rd International Cosmic Rays Conference, ICRC 2013, Rio de Janeiro, Brazil, 2/07/13.

FOR THE MOJAVE COLLABORATION, FOR THE OVRO COLLABORATION, FOR THE METSÄHOVI RADIO OBSERVATORY, FOR THE MAGIC COLLABORATION, FOR THE Fermi COLLABORATION. Detailed multifrequency studies of the high-frequency-peaked bl lac object 1es 1011+496 in 2011 and 2012. In Proceedings of the 33rd International Cosmic Rays Conference, ICRC 2013. Sociedade Brasileira de Fisica. 2013. (Proceedings of the 33rd International Cosmic Rays Conference, ICRC 2013).

FOR THE MOJAVE COLLABORATION ; FOR THE OVRO COLLABORATION ; FOR THE METSÄHOVI RADIO OBSERVATORY et al. / Detailed multifrequency studies of the high-frequency-peaked bl lac object 1es 1011+496 in 2011 and 2012. Proceedings of the 33rd International Cosmic Rays Conference, ICRC 2013. Sociedade Brasileira de Fisica, 2013. (Proceedings of the 33rd International Cosmic Rays Conference, ICRC 2013).

@inproceedings{c400b22d145a4a97910fa0a5deeec078,

title = "Detailed multifrequency studies of the high-frequency-peaked bl lac object 1es 1011+496 in 2011 and 2012",

abstract = "We present multiwavelength (MWL) observations of the high-frequency-peaked BL Lac object 1ES 1011+496 (z = 0.212 [1]), based on very high energy (VHE, E > 100 GeV) observations performed with the stereoscopic system of MAGIC in 2011 and 2012. The system, located on La Palma, Canary Islands, Spain, consists of two 17 m diameter imaging Cherenkov telescopes allowing measurements down to a threshold as low as 50 GeV. While VHE observations in 2011 yielded a barely significant detection, 1ES 1011+496 was clearly detected in 2012 by MAGIC allowing a detailed measure of the differential spectrum. During both years the flux level above 150 GeV was compatible to that previously observed by MAGIC in this energy regime, and the source did not show any statistically significant variability in VHE γ-rays. Complementary MWL campaigns during previous VHE observations with MAGIC performed in mono mode, were lacking high energy (HE, E < 100 GeV) detection to cover the second peak of the spectral energy distribution (SED). The observations presented here provide a more precise determination of the SED which are reproduced with a one-zone Synchrotron-Self Compton (SSC) model. In particular, the inverse Compton (IC) peak is well constrained for the first time by the simultaneous coverage in HE and VHE γ-rays by Fermi-LAT and MAGIC. In addition, the results of optical polarimetric studies performed in 2012 will be shown in combination with multiepoch radio maps.",

keywords = "1ES 1011+496, AGNs, BL Lac objects, MAGIC, Multiwavelength campaigns, VHE γ-rays",

author = "{FOR THE MOJAVE COLLABORATION} and {FOR THE OVRO COLLABORATION} and {FOR THE METS{\"A}HOVI RADIO OBSERVATORY} and {FOR THE MAGIC COLLABORATION} and {FOR THE Fermi COLLABORATION} and S. Paiano and C. Schultz and Almeida, {U. Barres De} and Vela, {P. D.A.} and E. Lindfors and F. Tavecchio and S. Buson and F. D{\textquoteright}Ammando and Lister, {M. L.} and T. Hovatta and A. Lahteenmaki and C. Mundell and I. Steele",

year = "2013",

month = jan,

day = "1",

language = "English",

series = "Proceedings of the 33rd International Cosmic Rays Conference, ICRC 2013",

publisher = "Sociedade Brasileira de Fisica",

booktitle = "Proceedings of the 33rd International Cosmic Rays Conference, ICRC 2013",

address = "Brazil",

note = "33rd International Cosmic Rays Conference, ICRC 2013 ; Conference date: 02-07-2013 Through 09-07-2013",

}

TY - GEN

T1 - Detailed multifrequency studies of the high-frequency-peaked bl lac object 1es 1011+496 in 2011 and 2012

AU - FOR THE MOJAVE COLLABORATION

AU - FOR THE OVRO COLLABORATION

AU - FOR THE METSÄHOVI RADIO OBSERVATORY

AU - FOR THE MAGIC COLLABORATION

AU - FOR THE Fermi COLLABORATION

AU - Paiano, S.

AU - Schultz, C.

AU - Almeida, U. Barres De

AU - Vela, P. D.A.

AU - Lindfors, E.

AU - Tavecchio, F.

AU - Buson, S.

AU - D’Ammando, F.

AU - Lister, M. L.

AU - Hovatta, T.

AU - Lahteenmaki, A.

AU - Mundell, C.

AU - Steele, I.

PY - 2013/1/1

Y1 - 2013/1/1

N2 - We present multiwavelength (MWL) observations of the high-frequency-peaked BL Lac object 1ES 1011+496 (z = 0.212 [1]), based on very high energy (VHE, E > 100 GeV) observations performed with the stereoscopic system of MAGIC in 2011 and 2012. The system, located on La Palma, Canary Islands, Spain, consists of two 17 m diameter imaging Cherenkov telescopes allowing measurements down to a threshold as low as 50 GeV. While VHE observations in 2011 yielded a barely significant detection, 1ES 1011+496 was clearly detected in 2012 by MAGIC allowing a detailed measure of the differential spectrum. During both years the flux level above 150 GeV was compatible to that previously observed by MAGIC in this energy regime, and the source did not show any statistically significant variability in VHE γ-rays. Complementary MWL campaigns during previous VHE observations with MAGIC performed in mono mode, were lacking high energy (HE, E < 100 GeV) detection to cover the second peak of the spectral energy distribution (SED). The observations presented here provide a more precise determination of the SED which are reproduced with a one-zone Synchrotron-Self Compton (SSC) model. In particular, the inverse Compton (IC) peak is well constrained for the first time by the simultaneous coverage in HE and VHE γ-rays by Fermi-LAT and MAGIC. In addition, the results of optical polarimetric studies performed in 2012 will be shown in combination with multiepoch radio maps.

AB - We present multiwavelength (MWL) observations of the high-frequency-peaked BL Lac object 1ES 1011+496 (z = 0.212 [1]), based on very high energy (VHE, E > 100 GeV) observations performed with the stereoscopic system of MAGIC in 2011 and 2012. The system, located on La Palma, Canary Islands, Spain, consists of two 17 m diameter imaging Cherenkov telescopes allowing measurements down to a threshold as low as 50 GeV. While VHE observations in 2011 yielded a barely significant detection, 1ES 1011+496 was clearly detected in 2012 by MAGIC allowing a detailed measure of the differential spectrum. During both years the flux level above 150 GeV was compatible to that previously observed by MAGIC in this energy regime, and the source did not show any statistically significant variability in VHE γ-rays. Complementary MWL campaigns during previous VHE observations with MAGIC performed in mono mode, were lacking high energy (HE, E < 100 GeV) detection to cover the second peak of the spectral energy distribution (SED). The observations presented here provide a more precise determination of the SED which are reproduced with a one-zone Synchrotron-Self Compton (SSC) model. In particular, the inverse Compton (IC) peak is well constrained for the first time by the simultaneous coverage in HE and VHE γ-rays by Fermi-LAT and MAGIC. In addition, the results of optical polarimetric studies performed in 2012 will be shown in combination with multiepoch radio maps.

KW - 1ES 1011+496

KW - AGNs

KW - BL Lac objects

KW - MAGIC

KW - Multiwavelength campaigns

KW - VHE γ-rays

UR - http://www.scopus.com/inward/record.url?scp=85052437820&partnerID=8YFLogxK

M3 - Chapter in a published conference proceeding

AN - SCOPUS:85052437820

T3 - Proceedings of the 33rd International Cosmic Rays Conference, ICRC 2013

BT - Proceedings of the 33rd International Cosmic Rays Conference, ICRC 2013

PB - Sociedade Brasileira de Fisica

T2 - 33rd International Cosmic Rays Conference, ICRC 2013

Y2 - 2 July 2013 through 9 July 2013

ER -

Detailed multifrequency studies of the high-frequency-peaked bl lac object 1es 1011+496 in 2011 and 2012

Abstract

Publication series

Conference

Funding

Keywords

ASJC Scopus subject areas

Other files and links

Fingerprint

Cite this