! Hubble Telescope Cycle 5 (1995) Phase II Proposal Template ! $Id: 5980,v 4.1 1995/03/28 16:31:06 pepsa Exp $ ! ! Refer to the HST Phase II Proposal Instructions to fill this out ! ! Anything after a "!" is ignored, and may be deleted ! ! All keywords with multiple entries are comma delimited except the ! Visit_Requirements and Special_Requirements keywords which can be ! delimited with carriage returns or semi-colons, but not commas ! ! For help call your Program Coordinator: Doug Van Orsow ! Phone: 410 338-4568 , E-mail: vanorsow@stsci.edu ! ! This partially completed template was generated from a Phase I proposal. ! Date generated: Sun Dec 18 10:05:11 EST 1994 ! Proposal_Information ! Section 4 Title: The jet of 3C 273: its morphology and the nature of the local particle acceleration mechanism(s) Proposal_Category: GO Scientific_Category: AGN Cycle: 5 Investigators PI_name: Hermann-Josef Roeser PI_Institution: Max-Planck-Institut fuer Astronomie CoI_Name: Klaus Meisenheimer CoI_Institution: Max-Planck-Institut fuer Astronomie Contact: N ! Y or N (designate at most one contact) CoI_Name: Robin G. Conway CoI_Institution: Jodrell Bank Contact: N ! Y or N (designate at most one contact) CoI_Name: Richard J. Davis CoI_Institution: Jodrell Bank Contact: N ! Y or N (designate at most one contact) Abstract: ! Free format text (please update) Ground and space based observations of the 3C273 jet have revealed a complex structure. The optically faint compact radio hot spot, the optically quiet radio lobe/halo and the low brightness level in the inner part of the jet are morphological features not understood within our standard picture of extragalactic radio sources. Most puzzling we have to invoke particle acceleration all over the jet and not only in the strong hot spot or compact knots. This is due to the short life time of optically radiating relativistic particles. Highly resolved radio maps reveal structure with angular scales down to the 0.1" level. As it is the high-frequency information which gives the most stringent constraints on the physics at work, a detailed analysis thus has to rely on HST. We propose to obtain deep images in two filters to construct an optical spectral index map at 0.1" resolution. This map will allow a detailed radio/optical comparison to trace places of particle acceleration. As we know from ground based observations the synchrotron spectra exhibit a cutoff, which happens to lie in the IR-optical regime. Thus the optical spectral index is a sensitive indicator for changes in this cutoff frequency, which in turn maps changes in the maximum energy of the relativistic particles i.e. the acceleration efficiency. By comparison with total intensity and polarization maps we should get hints at the basic acceleration mechanism at work. Questions ! Free format text (please update) Observing_Description: An accuracy for the spectral index on the order of 0.1 is needed to allow meaningful interpretation. With two filters selected at 300 and at 622 nm for DQE reasons a signal-to- noise ratio (S/N) of 30 per resolution element is thus needed. We have calculated the necessary exposure times to achieve that for the hot spot in the F622W, which is roughly equivalent in surface brightness to the inter-knot region. It is, however, not feasible to reach a S/N of 30 per resolution element in F300W for the hot spot. In that filter, we have timed the integration time to achieve our goal on average over the main body of the jet. The individual exposure times have been set to make use of the full visibility period in each orbit. The table quotes the signal- to-noise ratio per resolution element in the resulting summed frame for the various features in the jet. The calculations include photon noise in the object, the background and the read-out-noise of the detector. filter F300W feature area flux Deltat frames S/N_of_sum microJy sec number per_beam knot A .5" x .5" 3.2 2580 14 39 knot D .5" x .8" 2.5 2580 14 22 hot spot .5" x .5" 0.6 2580 14 9 filter F622W feature area flux Deltat frames S/N_of_sum microJy sec number per_beam knot A .5" x .5" 5.7 2400 4 75 knot D .5" x .8" 8.4 2400 4 71 hot spot .5" x .5" 1.6 2400 4 31 The resolution element was assumed to be 0.11". For astrometric purposes we will also obtain a short exposure in each filter (not to saturate the quasar nucleus and the astrometric reference stars in the field). These exposures require a total of 18 orbits which could be acquired in two separate visits. Additional_Comments: Fixed_Targets Target_Number: 1 Target_Name: 3C273-jet Description: GALAXY,Quasar,Jet Position: RA = 12H 26M 32.530S +/- 0.007S, DEC = +2D 19' 31.2" +/- 0.1" Equinox: 1950 RV_or_Z: Z = 0.158 Flux: SURF-CONT(5370)=2.6 +/- 0.3E-17 SURF-CONT(2590)=4.2 +/- 0.4E-17 SIZE = 2.3 +/- 0.3 Comments: Bright object (Quasar core) with V=13mag 20" from jet. Position (jet) is relative to 3C273 core, as given in Guide-Star-Catalogue, i.e. coordiantes are in GSC-frame. Visits Visit_Number: 1 Visit_Requirements: PCS MODE F ORIENT 108d TO 110d Visit_Comments: Orientation constraint by CCD blooming and diffraction spikes. Exposure_Number: 1 Target_Name: 3C273-jet Config: WFPC2 Opmode: IMAGE Aperture: PC1-FIX Sp_Element: F622W Optional_Parameters: CLOCKS=YES,CR-SPLIT=NO Number_of_Iterations: 1 Time_Per_Exposure: 2300S Special_Requirements: POS TARG 0.0,0.0 Exposure_Number: 2 Target_Name: 3C273-jet Config: WFPC2 Opmode: IMAGE Aperture: PC1-FIX Sp_Element: F622W Optional_Parameters: CLOCKS=YES,CR-SPLIT=NO Number_of_Iterations: 1 Time_Per_Exposure: 2500S Special_Requirements: POS TARG -0.501,0. Exposure_Number: 3 Target_Name: 3C273-jet Config: WFPC2 Opmode: IMAGE Aperture: PC1-FIX Sp_Element: F622W Optional_Parameters: CLOCKS=NO,CR-SPLIT=NO Number_of_Iterations: 1 Time_Per_Exposure: 2S Special_Requirements: SAME POS AS 2 Exposure_Number: 4 Target_Name: 3C273-jet Config: WFPC2 Opmode: IMAGE Aperture: PC1-FIX Sp_Element: F622W Optional_Parameters: CLOCKS=YES,CR-SPLIT=NO Number_of_Iterations: 1 Time_Per_Exposure: 2600S Special_Requirements: POS TARG 0.,+0.501 Exposure_Number: 5 Target_Name: 3C273-jet Config: WFPC2 Opmode: IMAGE Aperture: PC1-FIX Sp_Element: F622W Optional_Parameters: CLOCKS=YES,CR-SPLIT=NO Number_of_Iterations: 1 Time_Per_Exposure: 2600S Special_Requirements: POS TARG +0.501,0. Exposure_Number: 6 Target_Name: 3C273-jet Config: WFPC2 Opmode: IMAGE Aperture: PC1-FIX Sp_Element: F300W Optional_Parameters: CLOCKS=YES,CR-SPLIT=NO Number_of_Iterations: 1 Time_Per_Exposure: 2600S Special_Requirements: POS TARG 0.,0. Exposure_Number: 7 Target_Name: 3C273-jet Config: WFPC2 Opmode: IMAGE Aperture: PC1-FIX Sp_Element: F300W Optional_Parameters: CLOCKS=YES,CR-SPLIT=NO Number_of_Iterations: 1 Time_Per_Exposure: 2600S Special_Requirements: POS TARG -0.501,0. Exposure_Number: 8 Target_Name: 3C273-jet Config: WFPC2 Opmode: IMAGE Aperture: PC1-FIX Sp_Element: F300W Optional_Parameters: CLOCKS=YES,CR-SPLIT=NO Number_of_Iterations: 1 Time_Per_Exposure: 2500S Special_Requirements: POS TARG -1.002,+0.501 Exposure_Number: 9 Target_Name: 3C273-jet Config: WFPC2 Opmode: IMAGE Aperture: PC1-FIX Sp_Element: F300W Optional_Parameters: CLOCKS=NO,CR-SPLIT=NO Number_of_Iterations: 1 Time_Per_Exposure: 8S Special_Requirements: SAME POS AS 8 Exposure_Number: 10 Target_Name: 3C273-jet Config: WFPC2 Opmode: IMAGE Aperture: PC1-FIX Sp_Element: F300W Optional_Parameters: CLOCKS=YES,CR-SPLIT=NO Number_of_Iterations: 1 Time_Per_Exposure: 2600S Special_Requirements: POS TARG +0.501,-0.501 Visit_Number: 2 Visit_Requirements: PCS MODE F SAME ORIENT AS 1 Visit_Comments: Orientation constraint by CCD blooming and diffraction spikes. Use same guide-stars as in visit 1. Exposure_Number: 11 Target_Name: 3C273-jet Config: WFPC2 Opmode: IMAGE Aperture: PC1-FIX Sp_Element: F300W Optional_Parameters: CLOCKS=YES,CR-SPLIT=NO Number_of_Iterations: 1 Time_Per_Exposure: 2300S Special_Requirements: POS TARG +0.334,-0.334 Exposure_Number: 12 Target_Name: 3C273-jet Config: WFPC2 Opmode: IMAGE Aperture: PC1-FIX Sp_Element: F300W Optional_Parameters: CLOCKS=YES,CR-SPLIT=NO Number_of_Iterations: 1 Time_Per_Exposure: 2600S Special_Requirements: POS TARG +0.835,+0.167 Exposure_Number: 13 Target_Name: 3C273-jet Config: WFPC2 Opmode: IMAGE Aperture: PC1-FIX Sp_Element: F300W Optional_Parameters: CLOCKS=YES,CR-SPLIT=NO Number_of_Iterations: 1 Time_Per_Exposure: 2500S Special_Requirements: POS TARG -0.668,-0.334 Exposure_Number: 14 Target_Name: 3C273-jet Config: WFPC2 Opmode: IMAGE Aperture: PC1-FIX Sp_Element: F300W Optional_Parameters: CLOCKS=NO,CR-SPLIT=NO Number_of_Iterations: 1 Time_Per_Exposure: 8S Special_Requirements: SAME POS AS 13 Exposure_Number: 15 Target_Name: 3C273-jet Config: WFPC2 Opmode: IMAGE Aperture: PC1-FIX Sp_Element: F300W Optional_Parameters: CLOCKS=YES,CR-SPLIT=NO Number_of_Iterations: 1 Time_Per_Exposure: 2600S Special_Requirements: POS TARG -0.167,+0.668 Exposure_Number: 16 Target_Name: 3C273-jet Config: WFPC2 Opmode: IMAGE Aperture: PC1-FIX Sp_Element: F300W Optional_Parameters: CLOCKS=YES,CR-SPLIT=NO Number_of_Iterations: 1 Time_Per_Exposure: 2600S Special_Requirements: POS TARG +1.336,+0.668 Visit_Number: 3 Visit_Requirements: PCS MODE F SAME ORIENT AS 1 Visit_Comments: Orientation constraint by CCD blooming and diffraction spikes. Use same guide-stars as in visit 1. Exposure_Number: 17 Target_Name: 3C273-jet Config: WFPC2 Opmode: IMAGE Aperture: PC1-FIX Sp_Element: F300W Optional_Parameters: CLOCKS=YES,CR-SPLIT=NO Number_of_Iterations: 1 Time_Per_Exposure: 2300S Special_Requirements: POS TARG +0.668,+0.835 Exposure_Number: 18 Target_Name: 3C273-jet Config: WFPC2 Opmode: IMAGE Aperture: PC1-FIX Sp_Element: F300W Optional_Parameters: CLOCKS=YES,CR-SPLIT=NO Number_of_Iterations: 1 Time_Per_Exposure: 2500S Special_Requirements: POS TARG -0.835,+0.334 Exposure_Number: 19 Target_Name: 3C273-jet Config: WFPC2 Opmode: IMAGE Aperture: PC1-FIX Sp_Element: F300W Optional_Parameters: CLOCKS=NO,CR-SPLIT=NO Number_of_Iterations: 1 Time_Per_Exposure: 8S Special_Requirements: SAME POS AS 18 Exposure_Number: 20 Target_Name: 3C273-jet Config: WFPC2 Opmode: IMAGE Aperture: PC1-FIX Sp_Element: F300W Optional_Parameters: CLOCKS=YES,CR-SPLIT=NO Number_of_Iterations: 1 Time_Per_Exposure: 2600S Special_Requirements: POS TARG -0.334,-0.167 Exposure_Number: 21 Target_Name: 3C273-jet Config: WFPC2 Opmode: IMAGE Aperture: PC1-FIX Sp_Element: F300W Optional_Parameters: CLOCKS=YES,CR-SPLIT=NO Number_of_Iterations: 1 Time_Per_Exposure: 2600S Special_Requirements: POS TARG +0.167,+0.835 Exposure_Number: 22 Target_Name: 3C273-jet Config: WFPC2 Opmode: IMAGE Aperture: PC1-FIX Sp_Element: F300W Optional_Parameters: CLOCKS=YES,CR-SPLIT=NO Number_of_Iterations: 1 Time_Per_Exposure: 2600S Special_Requirements: POS TARG +1.169,-0.167 Data_Distribution ! Defaults indicated; change if desired Medium: 8MM ! 8MM or 6250BPI or 1600BPI Blocking_Factor: 10 ! 10 or 1 ! Only astronomers with very old 9- ! track tape drives should consider ! a blocking factor of 1 Ship_To: PI_Address ! STSCI or PI_Address or ! PI Address from Phase I is: ! ! Koenigstuhl 17, ! D 69117 Heidelberg,Germany ! ! Ship_Via: UPS ! UPS (2-day) or OVERNIGHT ! Overnight shipping done at PI expense Recipient_Email: ! Needed if Ship_To: is not PI_Address ! ! Let us know what you think of this template and software! ! Please send a list of your likes and dislikes to your Program Coordinator __Diagnostic-Sum-Section__ Software-Version (Controller= 2.0) Preprocessor (Errors= 0 Fatal-Errors= 0 ) Validation (Errors= 0 Fatal-Errors= 0 ) Transformation (Errors= 0 Fatal-Errors= 0 ) CASM (Errors= 1 Fatal-Errors= 0 ) __User-Comments__