! Proposal 6576, submission 1 ! PI: Mark Lacy ! Received Wed Feb 14 14:12:33 EST 1996 ! From: m.lacy1@physics.oxford.ac.uk ! Hubble Space Telescope Cycle 6 (1996) Phase II Proposal Template ! $Id: 6576,v 26.1 1997/04/23 17:19:14 pepsa Exp $ ! Hubble Space Telescope Cycle 6 (1996) Phase II Proposal Template ! $Id: 6576,v 26.1 1997/04/23 17:19:14 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: Ready ! Phone: 410-338-4546 , E-mail: ready@stsci.edu ! ! This partially completed template was generated from a Phase I proposal. ! Name of Phase I Proposal: archive-0481.lacy.prop ! Date generated: Fri Dec 22 15:36:43 EST 1995 ! Proposal_Information ! Section 4 Title: HST imaging of the two most distant radio galaxies Proposal_Category: GO Scientific_Category: AGN Cycle: 6 Investigators PI_name: Mark Lacy PI_Institution: Oxford University CoI_Name: Hyron Spinrad CoI_Institution: University of California, Berkeley Contact: ! Y or N (designate at most one contact) CoI_Name: Arjun Dey CoI_Institution: University of California, Berkeley Contact: ! Y or N (designate at most one contact) CoI_Name: Steve Rawlings CoI_Institution: Astrophysics, Oxford University Contact: ! Y or N (designate at most one contact) Abstract: ! Free format text (please update) The recent discovery of two radio galaxies at z>4, 8C1435+635 (z=4.25) and 6C0140+326 (z=4.41) has allowed us to investigate spatially resolved objects within the first Gyr of the lifetime of a closed Universe. We require high-resolution imaging of these objects with the HST in LyAlpha and continuum. In conjuction with ground based data, HST images will allow us to study the neutral gas and dust content of these galaxies, and constrain the UV emission mechanism and the LyAlpha ionisation mechanism. In the case of 6C0140+326, LyAlpha falls within the narrow-band F658N filter, facilitating a deep narrow-band search of the field for companion galaxies. Such a search will be highly sensitive to small scale-size sub-units of star-forming gas which will later merge into more massive galaxies. A candidate emission- line object has already been found using ground-based observations; this can be observed at the same pointing as the radio galaxy itself. Questions ! Free format text (please update) Observing_Description: Target observations: 1)8C1435+635: We require observations with the Wide-Field Camera (WFC) through filter F814W to study the structure of the galaxy in continuum and F622W to study the LyAlpha emission. The fact that 8C1435+635 falls very near the centre of the CVZ means that we can make very good use of the observing time to obtain deep images, exposing for 3X1500s per orbit for 5 orbits per filter. The exposure times required to achieve a given signal-to-noise ratio will depend on the sizes of the optical structures, which of course we do not know at present. By analogy with the previous highest-z galaxy, 4C41.17 though, we might expect much of the emission to come from barely resolved knots or clumps. Nevertheless, to enhance our surface brightness sensitivity we have decided to use the WFC. We have estimated our exposure times and limiting magnitudes based on measurements from actual, very long WFPC2 exposures (Dickinson private communication), and the WFPC2 exposure time calculator. With 15X1500s exposures through the F814W filter, we anticipate a 5 sigma point source detection limit of AB=27.8, which will allow us to detect any unresolved (<~ 1 kpc^2) features having > 3% of the total I-band flux. Our corresponding 5 sigma surface brightness limit is AB=26.4 mag in an aperture of 1 arcsec^2. If the light is smoothly spread over an area of 3 arcsec^2 (the approximate size as measured from our I-band Keck image), we will achieve an approx 5 sigma detection of flux in every 3X3 pixel (approx 0.3X0.3 arcsec^2) box within this area. Imaging in LyAlpha is hampered by the lack of a suitable narrow-band filter. The LRF has a break in coverage at 6402A, just beyond the peak of our 40A -wide LyAlpha line at 6399A. Nevertheless, the high EW of the LyAlpha line (approx 1000A ), and the factor of four continuum discontinuity across LyAlpha will allow us to use the F622W filter to obtain an image which will be dominated by the line contribution with only an approx 5% contribution from the continuum, albeit at the expense of additional noise from the sky. If the line and continuum structures are seen to be very different, we can subtract a scaled version of the I-band image to obtain a pure line-emission image. Again, we expect much of the emission to be clumpy, and 15X1500s observations through the F622W filter and WFC will enable us to obtain a 5 sigma point source detection limit of 2 X 10^-17 ergs^-1cm^-2, allowing detection of any unresolved clump of emission with > 5% of the total LyAlpha flux of the galaxy. Our 5 sigma surface brightness sensitivity will be 6.0X10^-17 ergs^-1cm^-2 in 1 arcsec^2. If the source is smoothly spread out over an area of 3 arcsec^2, then we will achieve a 5 sigma detection of the flux in each 5X5 pixel box. 2)6C0140+326: For this galaxy, we originally requested images through the F814W filter to study the continuum and F658N to study the line emission. We wished expose for 2X1000s per orbit for 10 orbits per band. Following the Phase I allocation and report of the TAC we have decided to observe this object for two orbits in the F658N filter and a continuum filter to obtain a LyAlpha image of the radio galaxy. For the LyAlpha image of the galaxy the FWHM of the LyAlpha emission is >~1-arcsec and the LyAlpha flux is 8.7X10^-16 ergs^-1cm^-2 giving 3 sigma per pixel in the WFC if the flux is smoothly spread out. We plan to observe at different pointings per orbit to allow the identification and removal of hot pixels. By separating our pointings by offsets corresponding to non-integer numbers of pixels we hope to improve the effective sampling of the PSF. Parallel observations with the FOC: In order to maximize the potential of HST for serendipitous discoveries, we request parallel UV imaging observations with the FOC and the F220W, F275W and F342W filters. Although the field of view of the F/96 relay is small, our integration times will be very long and should reach interestingly faint flux limits. The ``faint blue galaxy'' population seen (e.g.) in Tyson's deep field imaging data is numerous and presumably UV--bright, and we should have a reasonable chance of obtaining ultraviolet photometry and perhaps morphologies for several such objects. The cost in terms of telescope overhead is negligible, and the opportunity for chance discovery using HST's unique ultraviolet capabilities is worth the additional effort. We wish to maintain the same telescope ORIENT angle throughout these observations, both to minimize interpolations necessary for stacking the WFPC2 images, and to maintain the field of the FOC at the same pointing for the parallel observations. Real_Time_Justification: Calibration_Justification: ! Move appropriate text from Real_Time_Justification Additional_Comments: Fixed_Targets ! Section 5.1 Target_Number:1 Target_Name:GAL-1436+6319 Alternate_Names:8C1435+635, 4C63.20 Description:GALAXY, Radio Galaxy, High z Gal Position:RA=14H 35M 27.6S +/- 0.1S, DEC=+63D 32' 12.5" +/- 1" ! Most common specification format is ! RA=0H 0M 0.00S +/- 0S, ! DEC=0D 0' 0.0" +/- 0", ! PLATE-ID=0000 Equinox:1950 RV_or_Z:Z=4.25 RA_PM: ! Units are seconds of time per year Dec_PM: ! Units are seconds of arc per year Epoch: Annual_Parallax: Flux:SURF(I)=26 +/- 1 ! Include at least V and B-V Comments: V>26 Fixed_Targets ! Section 5.1 Target_Number:2 Target_Name:GAL-0143+3253 Alternate_Names:6C0140+326 Description:GALAXY, Radio Galaxy, High z Gal Position:RA=01H 40M 51.51S +/- 0.1S, DEC=+32D 38' 45.6" +/- 1" ! Most common specification format is ! RA=0H 0M 0.00S +/- 0S, ! DEC=0D 0' 0.0" +/- 0", ! PLATE-ID=0000 Equinox:1950 RV_or_Z:Z=4.41 RA_PM: ! Units are seconds of time per year Dec_PM: ! Units are seconds of arc per year Epoch: Annual_Parallax: Flux:SURF(I)=26 +/- 1 ! Include at least V and B-V Comments: V>26 ! This is a template for a single visit containing a single exposure ! Repeat exposure and visit blocks as needed Visits ! Section 6 Visit_Number:1 Visit_Requirements:PCS MODE F CVZ ORIENT 1D to 360D ! Section 7.1 On_Hold_Comments: Visit_Comments:Any ORIENT angle is OK provided it is maintained throughout the visit Exposure_Number: 10 ! Section 6.5 Target_Name:GAL-1436+6319 Config:WFPC2 Opmode:IMAGE Aperture:WFALL Sp_Element:F814W Wavelength: Optional_Parameters: Number_of_Iterations:3 Time_Per_Exposure:1200S Special_Requirements:!SEQ 10,20,30,40,50,60,70,80,87 NON-INT ! Section 7.2 Exposure_Number:15 ! Section 6.5 Target_Name:GAL-1436+6319 Config:FOC/96 Opmode:IMAGE Aperture:512x1024 Sp_Element:F220W Wavelength: Optional_Parameters:PIXEL=50x25 Number_of_Iterations:2 Time_Per_Exposure:1800S !2220S Special_Requirements:PAR WITH 10 ! Section 7.2 Exposure_Number: 20 ! Section 6.5 Target_Name:GAL-1436+6319 Config:WFPC2 Opmode:IMAGE Aperture:WFALL Sp_Element:F814W Wavelength: Optional_Parameters: Number_of_Iterations:3 Time_Per_Exposure:1400S Special_Requirements:POS TARG +0.5,+0.25 Exposure_Number:25 ! Section 6.5 Target_Name:GAL-1436+6319 Config:FOC/96 Opmode:IMAGE Aperture:512x1024 Sp_Element:F220W Wavelength: Optional_Parameters:PIXEL=50x25 Number_of_Iterations:2 Time_Per_Exposure:2100S !2499S Special_Requirements:PAR WITH 20 ! Section 7.2 Exposure_Number: 30 ! Section 6.5 Target_Name:GAL-1436+6319 Config:WFPC2 Opmode:IMAGE Aperture:WFALL Sp_Element:F814W Wavelength: Optional_Parameters: Number_of_Iterations:3 Time_Per_Exposure:1400S Special_Requirements:POS TARG +0.75,+0.75 ! Section 7.2 Exposure_Number:35 ! Section 6.5 Target_Name:GAL-1436+6319 Config:FOC/96 Opmode:IMAGE Aperture:512x1024 Sp_Element:F220W Wavelength: Optional_Parameters:PIXEL=50x25 Number_of_Iterations:2 Time_Per_Exposure:2100S !2490S Special_Requirements:PAR WITH 30 ! Section 7.2 Exposure_Number: 40 ! Section 6.5 Target_Name:GAL-1436+6319 Config:WFPC2 Opmode:IMAGE Aperture:WFALL Sp_Element:F814W Wavelength: Optional_Parameters: Number_of_Iterations:3 Time_Per_Exposure:1400S Special_Requirements:POS TARG +0.25,+0.5 ! Section 7.2 Exposure_Number:45 ! Section 6.5 Target_Name:GAL-1436+6319 Config:FOC/96 Opmode:IMAGE Aperture:512x1024 Sp_Element:F220W Wavelength: Optional_Parameters:PIXEL=50x25 Number_of_Iterations:2 Time_Per_Exposure:2100S !2490S Special_Requirements:PAR WITH 40 ! Section 7.2 Exposure_Number: 50 ! Section 6.5 Target_Name:GAL-1436+6319 Config:WFPC2 Opmode:IMAGE Aperture:WFALL Sp_Element:F622W Wavelength: Optional_Parameters: Number_of_Iterations:3 Time_Per_Exposure:1300S Special_Requirements: ! Section 7.2 Exposure_Number:55 ! Section 6.5 Target_Name:GAL-1436+6319 Config:FOC/96 Opmode:IMAGE Aperture:512x1024 Sp_Element:F220W Wavelength: Optional_Parameters:PIXEL=50x25 Number_of_Iterations:2 Time_Per_Exposure:1500S !2310S Special_Requirements:PAR WITH 50 ! Section 7.2 Exposure_Number: 60 ! Section 6.5 Target_Name:GAL-1436+6319 Config:WFPC2 Opmode:IMAGE Aperture:WFALL Sp_Element:F622W Wavelength: Optional_Parameters: Number_of_Iterations:3 Time_Per_Exposure:1400S Special_Requirements:POS TARG +0.5,+0.25 ! Section 7.2 Exposure_Number:65 ! Section 6.5 Target_Name:GAL-1436+6319 Config:FOC/96 Opmode:IMAGE Aperture:512x1024 Sp_Element:F220W Wavelength: Optional_Parameters:PIXEL=50x25 Number_of_Iterations:2 Time_Per_Exposure:2100S !2480S Special_Requirements:PAR WITH 60 ! Section 7.2 Exposure_Number: 70 ! Section 6.5 Target_Name:GAL-1436+6319 Config:WFPC2 Opmode:IMAGE Aperture:WFALL Sp_Element:F622W Wavelength: Optional_Parameters: Number_of_Iterations:3 Time_Per_Exposure:1400S Special_Requirements:POS TARG +0.75,+0.75 ! Section 7.2 Exposure_Number:75 ! Section 6.5 Target_Name:GAL-1436+6319 Config:FOC/96 Opmode:IMAGE Aperture:512x1024 Sp_Element:F275W Wavelength: Optional_Parameters:PIXEL=50x25 Number_of_Iterations:2 Time_Per_Exposure:2100S !2490S Special_Requirements:PAR WITH 70 ! Section 7.2 Exposure_Number: 80 ! Section 6.5 Target_Name:GAL-1436+6319 Config:WFPC2 Opmode:IMAGE Aperture:WFALL Sp_Element:F622W Wavelength: Optional_Parameters: Number_of_Iterations:3 Time_Per_Exposure:1300S Special_Requirements:POS TARG +0.25,+0.5 ! Section 7.2 Exposure_Number:85 ! Section 6.5 Target_Name:GAL-1436+6319 Config:FOC/96 Opmode:IMAGE Aperture:512x1024 Sp_Element:F275W Wavelength: Optional_Parameters:PIXEL=50x25 Number_of_Iterations:2 Time_Per_Exposure:1500S !2399S Special_Requirements:PAR WITH 80 ! Section 7.2 Exposure_Number: 87 ! Section 6.5 Target_Name:GAL-1436+6319 Config:WFPC2 Opmode:IMAGE Aperture:WFALL Sp_Element:F622W Wavelength: Optional_Parameters: Number_of_Iterations:1 Time_Per_Exposure:1100S Special_Requirements:POS TARG +0.25,+0.5 ! Section 7.2 Exposure_Number:88 ! Section 6.5 Target_Name:GAL-1436+6319 Config:FOC/96 Opmode:IMAGE Aperture:512x1024 Sp_Element:F342W Wavelength: Optional_Parameters:PIXEL=50x25 Number_of_Iterations:1 Time_Per_Exposure:1100S !1300S Special_Requirements:PAR WITH 87 ! Section 7.2 Comments: Visits ! Section 6 Visit_Number:2 Visit_Requirements:PCS MODE F ORIENT 1D TO 360D ! Section 7.1 On_Hold_Comments: Visit_Comments:Any orient angle is OK, provided it is maintained throughout the visit Exposure_Number:101 ! Section 6.5 Target_Name:GAL-0143+3253 Config:WFPC2 Opmode:IMAGE Aperture:WFALL Sp_Element:F675W Wavelength: Optional_Parameters: Number_of_Iterations:2 Time_Per_Exposure:1000S Special_Requirements:SEQ 101,120,126 NON-INT ! Section 7.2 Exposure_Number:105 ! Section 6.5 Target_Name:GAL-0143+3253 Config:FOC/96 Opmode:IMAGE Aperture:512x1024 Sp_Element:F275W Wavelength: Optional_Parameters:PIXEL=50x25 Number_of_Iterations:2 Time_Per_Exposure:1140S Special_Requirements:PAR WITH 101 ! Section 7.2 Exposure_Number:120 ! Section 6.5 Target_Name:GAL-0143+3253 Config:WFPC2 Opmode:IMAGE Aperture:WFALL Sp_Element:F658N Wavelength: Optional_Parameters: Number_of_Iterations:1 Time_Per_Exposure:1400S Special_Requirements: ! Section 7.2 Exposure_Number:125 ! Section 6.5 Target_Name:GAL-0143+3253 Config:FOC/96 Opmode:IMAGE Aperture:512x1024 Sp_Element:F275W Wavelength: Optional_Parameters:PIXEL=50x25 Number_of_Iterations:1 Time_Per_Exposure:1640S Special_Requirements:PAR WITH 120 ! Section 7.2 Exposure_Number:126 ! Section 6.5 Target_Name:GAL-0143+3253 Config:WFPC2 Opmode:IMAGE Aperture:WFALL Sp_Element:F658N Wavelength: Optional_Parameters:CR-SPLIT=NO Number_of_Iterations:1 Time_Per_Exposure:700S Special_Requirements: ! Section 7.2 Exposure_Number:127 ! Section 6.5 Target_Name:GAL-0143+3253 Config:FOC/96 Opmode:IMAGE Aperture:512x1024 Sp_Element:F342W Wavelength: Optional_Parameters:PIXEL=50x25 Number_of_Iterations:1 Time_Per_Exposure:700S Special_Requirements:PAR WITH 126 ! Section 7.2 Comments: Data_Distribution ! Defaults indicated; change if desired Medium: 8MM ! 8MM or 6250BPI or 1400BPI 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: ! ! Astrophysics ! Keble Road ! Oxford ! OX1 3RH ! ! 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