Title   High resolution imaging of X-ray hot spots in radio
Pi     C. Carilli
Time   16 hrs

1.6.2: Name -- High resolution imaging of X-ray hot spots in radio
jets
    Authors: C. Carilli

2. Science goal: We will perform high resolution imaging at 100 and
350 GHz of the X-ray detected hot spots in the jets of the archtype
jet sources M87 and 3C273. X-ray detected jet knots provide the most
severe constraints on particle acceleration and emission mechanisms
within radio jets, with radiative lifetimes that can be measured in
years. The spectral properties of these hot spots are well constrained
at cm, and optical to Xray wavelengths. The proposed observations will
provide the key link between the cm and optical/Xray regime, and hence
provide critical constraints on emission mechanisms (eg. synchrotron
or inverse compton) for the Xrays, as well as constraints on particle
acceleration mechanisms in the jets (see review by Harris 2003,
astroph 0302097). Resolution must be matched to that of the Chandra
and the VLA observations (0.5").

3. Number of sources: 2

4. Coordinates:

  4.1. 1229+0203, 1230+1223

  4.2. Moving target: no

  4.3. Time critical: no


5.  Spatial scales:

  5.1. Angular resolution: 0.2"

  5.2. Range of spatial scales/FOV: 0.5" to 15"

  5.3. Single dish: no

  5.4. ACA: no

  5.5. Subarrays: no


6. Frequencies:

  6.1. Receiver band: Band 3 -- 100 GHz  in Configuration B
                      Band 7 -- 350 GHz  in Configuration D

  6.2. Lines and Frequencies

  6.3. Spectral Resolution (km/s)

  6.4. Bandwidth or spectral coverage: standard continuum

7. Continuum flux density:

  7.1. Typical value:

  7.2. Continuum peak value:
      Cores:  5 to 10 Jy

  7.3. Required continuum rms:
                  1 mJy/bm at 100 GHz
                  1 mJy/bm at 350 GHz

  7.4. Dynamic range in image: 10000

8. Line intensity:

  8.1. Typical value:

  8.2. Required rms per channel:

  8.3. Spectral dynamic range:

9. Polarization: yes

10. Integration time per setting:
  1 track (+/- 2hr) at 100  x 2 sources
  1 track (+/- 2hr) at 350  x 2 sources

11. Total integration time for program: 16 hr

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Review Jean Turner: Submillimeter observations provide important
spectral link between optical-Xray and radio for hot spots. Good
project, amount of time about right to devote to this (modest).

Technical: angular resolution to match VLA and Chandra.  Required
sensitivity not explained here. To achieve this level of sensitivity,
given the concentration of flux in these sources, requires a high
dynamic range of 10,000:1.  Integration time seems to be driven by
uv-coverage and dynamic range rather than sensitivity.


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Review v2.0:
 
1.6.2 High resolution imaging of X-ray hot spots in radio jets
    (Carilli) 

Not revised since DRSP 1.1. Nothing needs to be added to the review
back then, no severe impact through reduction to 50 antennas, no need
for ACA.