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. . w ~ ~ ~ ~I , . . . .. i , :\ ., ., . . f ... ' , . . . . Tracking Active Galactic Nuclei with Austral


slide-1
SLIDE 1

Tracking Active Galactic Nuclei with Austral Milliarcsecond Interferometry

and with the MPIfR-MT SKA Prototype Telescope

Matthias Kadler, Roopesh Ojha, Eduardo Ros

for the TANAMI Collaboration

Bonn, 16.04.2018

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slide-2
SLIDE 2
slide-3
SLIDE 3

TANAMI

  • First light in 2007
  • Monitoring of >90 AGN jets at < −30°
  • LBA++

– 5 Australian LBA antennas – Hartebeesthoek, BKG antennas, DSN antennas, Auscope antennas

  • X-band (8.4GHz) and K-band (22.3GHz)
  • 3-4 epochs per year
slide-4
SLIDE 4

The Radio-Gamma (GeV) Sky

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SLIDE 5

The Radio-Gamma (GeV) Sky

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slide-6
SLIDE 6

General Radio-Gamma Results

§ Gamma-bright jets are faster § Gamma-variable jets are faster than non-variable sources § Gamma-bright jets show higher Doppler factors § Gamma-bright jets tend to be in “radio active” states § Gamma-bright jets show larger apparent opening angles § Radio/Gamma time delay of ~2 months

Lister et al. 2009, Kovalev et al. 2009, Savolainen et al. 2010, Pushkarev et al. 2010, 2010b, Ojha et al. 2010, Müller et al 2011, Abdo et al. 2009a, 2009b, 2009c, 2010a, 2010b, 2010c, 2010d, 2011, Böck et al. 2016

slide-7
SLIDE 7

Radio Monitoring Programs of Radio-Gamma AGN

§ UMRAO

§ 30 papers since 2008 § 1000 citations

§ F-GAMMA

§ 50 papers since 2008 § 1600 citations

§ OVRO

§ 100 papers since 2008 § 3200 citations

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slide-8
SLIDE 8

The Gamma (TeV) Sky

  • Today:

– MAGIC, H.E.S.S., Veritas

  • 2020+:

– Cherenkov Telescope Array (CTA)

Background: Fermi

http://tevcat.Chicago.edu . .

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Blaz.ar LBL AGN (unknown type)

  • Shell SNRIMolec. Cloud
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slide-9
SLIDE 9

Possible MPIfR-MT SKA Prototype Contribution to TANAMI

  • About 50 TANAMI sources above 1 Jy

– Bright enough for monitoring with the MPIfR-MT – Ku-band:

  • rapidly variable processes in brightest targets
  • flare follow-up, etc.

– S-band:

  • long-term monitoring

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slide-10
SLIDE 10

Further ideas

  • HESS or MAGIC are experiments; CTA will be a

facility with regular programs

  • At present 6 Blazars & 2 RG in TANAMI are TeV

emitters – they will be monitored by CTA and need radio monitoring

  • S-band monitoring also worth, radio spectrum of

TeV emitters favored

  • Several sources regularly monitored (filler program)

are worth to be included

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