Aug 27 – 31, 2018
LVH, Luisenstraße 58, 10117 Berlin
Europe/Berlin timezone

H.E.S.S. observations of the FSRQ PKS 1510-089 and its long-term evolution

Aug 28, 2018, 3:45 PM
LVH, Luisenstraße 58, 10117 Berlin

LVH, Luisenstraße 58, 10117 Berlin

<a href="" target="_blank"><b>LANGENBECK VIRCHOW HAUS</b></a> Luisenstraße 58, 10117 Berlin
Board: GR06
Poster (A0 portrait) Gamma-rays Poster Session and Coffee Break


Dr Michael Zacharias (TPIV, Ruhr-Univseristät, Bochum, Germany)


The governing process behind the variability of blazars is still unknown. Hence, the collection of long-term data on individual sources is an important step in order to unlock this unknown. The flat spectrum radio quasar (FSRQ) PKS 1510-089 has been observed by H.E.S.S. at VHE gamma-rays (E>100GeV) since the discorvery in 2009. A much denser monitoring effort has been started in 2015 in order to achieve the importantd detection of PKS 1510-089 during quiescence. The latter implies efficient particle acceleration beyond pc-scales from the black hole, since at smaller distances the strong absorption by the BLR inhibits the emission of VHE photons. The monitoring is complement by data at HE gamma-rays (E>100MeV) from Fermi, as well as X-ray and optical data from Swift and ATOM. The densely sampled lightcurves allow for detailed correlation analyses -- yet, no obvious correlations can be found between the VHE lightcurve and the multiwavelength data sets, indicating a non-trivial interplay of the jet processes. This makes this FSRQ difficult to interpret within a unique theoretical framework.

Primary author

Dr Michael Zacharias (TPIV, Ruhr-Univseristät, Bochum, Germany)


Ms Alicja Wierzcholska (Jagiellonian University) Dr David Sanchez (LAPP) Mr Felix Jankowsky (Landessternwarte Heidelberg) Heike Prokoph (DESY) Mr Mahmoud Mohamed (LSW Heidelberg) Prof. Stefan Wagner (LSW Heidelberg)

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