Lars Fuhrmann – MPIfR, Bonn 1 First GLAST Symposium Feb. 5-8, 2007 - Stanford University Ground...

10
Lars Fuhrmann – MPIfR, Bonn 1 First GLAST Symposium Feb. 5-8, 2007 - Stanford University Ground Support for GLAST: Ground Support for GLAST: Simultaneous Radio to Sub- Simultaneous Radio to Sub- mm Monitoring of mm Monitoring of Variability & Spectral Variability & Spectral Shape Shape Evolution of potential Evolution of potential GLAST Blazars GLAST Blazars L. Fuhrmann, A. Zensus, T. Krichbaum, M. Angelakis, MPIfR Bonn on behalf of the LAT Science Working Group on Blazars and other AGNs Gamma-ray Large Area Gamma-ray Large Area Space Telescope Space Telescope

Transcript of Lars Fuhrmann – MPIfR, Bonn 1 First GLAST Symposium Feb. 5-8, 2007 - Stanford University Ground...

Page 1: Lars Fuhrmann – MPIfR, Bonn 1 First GLAST Symposium Feb. 5-8, 2007 - Stanford University Ground Support for GLAST: Simultaneous Radio to Sub-mm Monitoring.

Lars Fuhrmann – MPIfR, Bonn 1

First GLAST Symposium Feb. 5-8, 2007 - Stanford University

Ground Support for GLAST:Ground Support for GLAST:

Simultaneous Radio to Sub-mm Simultaneous Radio to Sub-mm Monitoring of Variability & Monitoring of Variability &

Spectral Shape Spectral Shape Evolution of potential GLAST Evolution of potential GLAST

BlazarsBlazars

L. Fuhrmann, A. Zensus, T. Krichbaum, M. Angelakis, MPIfR Bonn

on behalf of the LAT Science Working Group on Blazars and

other AGNs

Gamma-ray Large AreaGamma-ray Large AreaSpace TelescopeSpace Telescope

Page 2: Lars Fuhrmann – MPIfR, Bonn 1 First GLAST Symposium Feb. 5-8, 2007 - Stanford University Ground Support for GLAST: Simultaneous Radio to Sub-mm Monitoring.

Lars Fuhrmann – MPIfR, Bonn 2

First GLAST Symposium Feb. 5-8, 2007 - Stanford University

OutlineOutline

• Multi-wavelengths (MW) activities: the ‘low-energy part’

• Effelsberg monitoring at cm-/mm-bands

• Complementory observations (planned): towards the mm-/sub-mm regime

– IRAM 30m telescope

– SMA

• Towards the optical regime

• Summary

Page 3: Lars Fuhrmann – MPIfR, Bonn 1 First GLAST Symposium Feb. 5-8, 2007 - Stanford University Ground Support for GLAST: Simultaneous Radio to Sub-mm Monitoring.

Lars Fuhrmann – MPIfR, Bonn 3

First GLAST Symposium Feb. 5-8, 2007 - Stanford University

GLAST will provide tremendous opportunity for future blazar studies

maximum science return from the offered LAT capabilities: MW studies

MW campaigns: ToO/Trigger, IPCs (months) and planned long- term campaigns (> 1 year)

cm-/mm-/sub-mm regime: ‘low- energy’ synchrotron part of blazar SEDs

MW activities: the ‘low energy’ partMW activities: the ‘low energy’ part

GLAST dedicated simult. cm- to sub-mm monitoring in support of the MW activities

Page 4: Lars Fuhrmann – MPIfR, Bonn 1 First GLAST Symposium Feb. 5-8, 2007 - Stanford University Ground Support for GLAST: Simultaneous Radio to Sub-mm Monitoring.

Lars Fuhrmann – MPIfR, Bonn 4

First GLAST Symposium Feb. 5-8, 2007 - Stanford University

here: blazars highly variable in I, P, plus spectral variability/evolution

different models are discussed: e.g. shock-in-jets (e.g. Marscher & Gear 1985) or changes in the direction of forward beaming (e.g. Villata & Raiteri 1999)

(quasi-) simultaneous, dense broad band monitoring allows to constrain variability/jet models (e.g. Tuerler et al. 2000, Lindfors et al. 2006)

MW activities: the ‘low energy’ partMW activities: the ‘low energy’ part

Krichbaum et al. in prep.

Page 5: Lars Fuhrmann – MPIfR, Bonn 1 First GLAST Symposium Feb. 5-8, 2007 - Stanford University Ground Support for GLAST: Simultaneous Radio to Sub-mm Monitoring.

Lars Fuhrmann – MPIfR, Bonn 5

First GLAST Symposium Feb. 5-8, 2007 - Stanford University

GLAST dedicated flux-density and polarisation monitoring of a larger sample of potential GLAST blazars Aim: (quasi-) simultaneous broad band spectra (cm, mm, sub-mm, optical/IR)

Effelsberg 100m telescope:

good and broad frequency coverage between 21cm and 7mm full polarisation information fast frequency switching capabilities (sec.) in the secondary focus excellent sensitivity (new sub-reflector in 2006)

high-precision, (quasi-) simultaneous broad band spectrum in about 35 min (~ 0.5 - 1 Jy source )

Effelsberg monitoring at cm-/mm-bandsEffelsberg monitoring at cm-/mm-bands

Page 6: Lars Fuhrmann – MPIfR, Bonn 1 First GLAST Symposium Feb. 5-8, 2007 - Stanford University Ground Support for GLAST: Simultaneous Radio to Sub-mm Monitoring.

Lars Fuhrmann – MPIfR, Bonn 6

First GLAST Symposium Feb. 5-8, 2007 - Stanford University

first (test-) epoch of ~36 hrs end of January 2007 at 110, 60, 36, 28, 20, 9, 7mm

sampling aim: 1 epoch every 2-3 weeks over the next years

source sample selection: ‘high priority VIP’ AGN/blazar list of the LAT AGN group of 150 sources

Effelsberg monitoring at cm-/mm-bandsEffelsberg monitoring at cm-/mm-bands

sub-sample of 50 sources

OVRO monitoring

MOJAVE

IPC, ToO, long-term MW campaigns

Page 7: Lars Fuhrmann – MPIfR, Bonn 1 First GLAST Symposium Feb. 5-8, 2007 - Stanford University Ground Support for GLAST: Simultaneous Radio to Sub-mm Monitoring.

Lars Fuhrmann – MPIfR, Bonn 7

First GLAST Symposium Feb. 5-8, 2007 - Stanford University

aim: extension of the Effelsberg monitoring towards the (shorter) mm-band (3 and 1 mm)

IRAM telescope: Pico Veleta 30m

heterodyne receivers at 3 and 1 mm simultaneously

flux-density plus polarisation

planned proposal for a similar monitoring complementing the Effelsberg observations (March 2007)

Towards the mm/sub-mm-bandsTowards the mm/sub-mm-bands

Page 8: Lars Fuhrmann – MPIfR, Bonn 1 First GLAST Symposium Feb. 5-8, 2007 - Stanford University Ground Support for GLAST: Simultaneous Radio to Sub-mm Monitoring.

Lars Fuhrmann – MPIfR, Bonn 8

First GLAST Symposium Feb. 5-8, 2007 - Stanford University

aim: extension of the Effelsberg monitoring towards the sub-mm-band (0.8 mm)

SMA - Submillimeter Array: Mauna Kea, Hawaii 8 element array of 6m antennas

sensitive, broad band SIS receivers at 1, 0.8 mm

planned proposal for a similar monitoring complementing the Effelsberg observations for the next deadline

Towards the mm/sub-mm-bandsTowards the mm/sub-mm-bands

Page 9: Lars Fuhrmann – MPIfR, Bonn 1 First GLAST Symposium Feb. 5-8, 2007 - Stanford University Ground Support for GLAST: Simultaneous Radio to Sub-mm Monitoring.

Lars Fuhrmann – MPIfR, Bonn 9

First GLAST Symposium Feb. 5-8, 2007 - Stanford University

aim: add the optical/IR bands

(quasi-) simultaneous optical observations with the 1.2m Kryoneri telescope approved (V/B/R/I bands)

Gino: REM & AIT telescopes (approved, V/R/I/H bands)

Towards the optical/IR regimeTowards the optical/IR regime

Page 10: Lars Fuhrmann – MPIfR, Bonn 1 First GLAST Symposium Feb. 5-8, 2007 - Stanford University Ground Support for GLAST: Simultaneous Radio to Sub-mm Monitoring.

Lars Fuhrmann – MPIfR, Bonn 10

First GLAST Symposium Feb. 5-8, 2007 - Stanford University

ambitious effort as MW support for GLAST: dense, (quasi-) simultaneous flux-density (and polarisation)

monitoring from cm-/mm-/sub-mm up to optical/IR wavelengths of 50 potential GLAST blazars

complementing the MW activities/campaigns of the LAT AGN group towards ‘the lowest energies’ and together with OVRO, MOJAVE and the help of the community

huge broad band data base to study & understand the high energy emission of these sources recorded by GLAST

SummarySummary