Free Access

Table 1

List of instruments participating in the multifrequency campaign and used in the compilation of the light curves and SEDs shown in Figs. 2 and 5.

Instrument/Observatory Energy range covered Web page

MAGIC 0.31–7.0 TeV http://wwwmagic.mppmu.mpg.de/
VERITAS 0.32–4.0 TeV http://veritas.sao.arizona.edu/
Swift/BAT 14–195 keV http://heasarc.gsfc.nasa.gov/docs/swift/swiftsc.html/
RXTE/PCA 3–20 keV http://heasarc.gsfc.nasa.gov/docs/xte/rxte.html
Swift/XRT 0.3–10 keV http://heasarc.gsfc.nasa.gov/docs/swift/swiftsc.html
Swift/UVOT V,B,U,UVW 1 ,UVM 2 ,UVW 2 http://heasarc.gsfc.nasa.gov/docs/swift/swiftsc.html
Abastumani R band http://www.oato.inaf.it/blazars/webt/
Crimean R band http://www.oato.inaf.it/blazars/webt/
Lulin R band http://www.oato.inaf.it/blazars/webt/
Roque de los Muchachos (KVA) R band http://www.oato.inaf.it/blazars/webt/
St. Petersburg R band http://www.oato.inaf.it/blazars/webt/
Talmassons R band http://www.oato.inaf.it/blazars/webt/
Noto 43 GHz http://www.noto.ira.inaf.it/
Metsähovi 37 GHz http://www.metsahovi.fi/
Medicina 8.4 GHz http://www.med.ira.inaf.it/index_EN.htm
UMRAO 4.8, 8.0, 14.5 GHz http://www.oato.inaf.it/blazars/webt/
RATAN-600 2.3, 4.8, 7.7, 11.1, 22.2 GHz http://www.sao.ru/ratan/
Effelsberg 2.6, 4.6, 7.8, 10.3, 13.6, 21.7, 31 GHz http://www.mpifr-bonn.mpg.de/div/effelsberg/index_e.html/

Notes. The instruments with the symbol “” observed Mrk 501 through the GASP-WEBT program. The energy range shown in Col. 2 is the actual energy range covered during the Mrk 501 observations, and not the nominal energy range of the instrument, which might only be achievable for bright sources and excellent observing conditions. See text for further comments.

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.