11832( 2) - 24-Oct-2008 17:52:39 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 11832 Version: 2 Check-in Time: 24-Oct-2008 17:52:39 STScI Edit Number: 0 Title The Structure and Physics of the Youngest Radio Galaxies ------------------------------------------------------------------------------------ Type Cycle GO 17 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Eric S. Perlman Florida Institute of Technology CoI: Dr. John T. Stocke University of Colorado at Boulder N CoI: Dr. Jeremiah K. Darling University of Colorado at Boulder N ------------------------------------------------------------------------------------ Abstract We propose to obtain X-ray images and spectra of two of the nearest and X-ray brightest compact symmetric objects. These objects are radio sources which have begun ejecting radio plasma within the last nsim 10000 years. The purpose of these observations is to discover their X-ray structure, measure their X-ray spectra and test the Wilson-Colbert hypothesis regarding the formation of radio-loud AGN. CSOs are ideal targets for this test because they are very small and very young. By targeting the very nearest objects we assure ourselves of the highest possible physical resolution. We are particularly looking for binary black holes (possibly found for one of our objects already) and/or nascent NLRs. ------------------------------------------------------------------------------------ Observations Description ------------------------ We are obtaining HST images in three bands of the galaxy NGC 5793.We will obtain observations in three bands with HST: F475W and F775W in the optical, using the WFC3 UVIS channel, and F160W in the near-IR, using the WFC3 IR channel. This strategy closely parallels that used in our Cycle 7-N observations of other CSOs, including 4C 31.04, NGC 3894 and 1943+70. The F475W and F775W filters replace the F450W and F702W filters used in our Cycle 7-N program as neither of those is available in WFC3 or ACS. Observing times have been calculated to obtain roughly equal sensitivity in all three bands (H=25.1, i=23.2 and V=23.6 mag/arcsec^2 respectively). The HST data will shed light on such issues as galactic structure, star formation, optical jets, dust features, tidal tails. When viewed in combination with the Chandra and archival radio observations, this will allow us to disentangle how the radio plasma impacts the properties of the gas it flows through as well as the galaxy as a whole. We will also probe the reverse side of the equation -- that is how the galaxy type and other galaxy features affect the evolution of the radio source and the surrounding X-ray atmosphere. Finally for these sources we will probe the deepest inner regions, where the radio source is in the process of taking shape. For NGC 5793 the existing Chandra snapshot shows a double nucleus which we will explore in depth with these HST and deeper Chandra observations. This may be related to the process triggering the ejection of the radio plasma. Real Time Justification 11832( 2) - 24-Oct-2008 17:52:39 - [ 2] ----------------------- These observations can be scheduled as flexibly as necessary. We do not have any special requirements as far as roll angle or orbital visibilities; the default parameters will do fine. Also there are no requirements as far as scheduling times. Calibration Justification ------------------------- Additional Comments ------------------- ------------------------------------------------------------------------------------ 11832( 2) - 24-Oct-2008 17:52:39 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 NGC-5793 GALAXY, ELLIPTICAL, RA=14H59M24.7000S +/- 0.1", J2000 V = 15.0 NUCLEUS, MULTIPLE DEC=-16D41'36.00" +/- 0.1" NUCLEI, RADIO GALAXY, LINER Reference Frame: ICRS Comments: This object was generated by the targetselector and retrieved from the NED database. ------------------------------------------------------------------------------------------------------------------------------------ 11832( 2) - 24-Oct-2008 17:52:39 - [ 4] Patterns ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 1 Primary_Pattern Secondary_Pattern Pattern_Type WFC3-IR-DITHER-LINE Pattern_Purpose DITHER Number_Of_Points 2 Point_Spacing 0.364 Line_Spacing Coordinate_Frame POS-TARG Pattern_Orient 34.34 Angle_Between_Sides Center_Pattern NO ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 2 Primary_Pattern Secondary_Pattern Pattern_Type WFC3-UVIS-DITHER-LINE Pattern_Purpose DITHER Number_Of_Points 2 Point_Spacing 2.391 Line_Spacing Coordinate_Frame POS-TARG Pattern_Orient 85.248 Angle_Between_Sides Center_Pattern NO ------------------------------------------------------------------------------------------------------------------------------------ 11832( 2) - 24-Oct-2008 17:52:39 - [ 5] Visit: 01 Visit Requirements: On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 NGC-5793 WFC3/IR MULTIAC IR-FIX F160W NSAMP=14, SAMP-SEQ=SPARS100 1 DEF PATTERN 1 1 CUM ------------------------------------------------------------------------------------------------------------------------------------ 2 NGC-5793 WFC3/UVI ACCUM UVIS-FIX F475W CR-SPLIT=NO 1 800 S PATTERN 2 2-3 S ------------------------------------------------------------------------------------------------------------------------------------ 3 NGC-5793 WFC3/UVI ACCUM UVIS-FIX F775W CR-SPLIT=NO 1 360 S S ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ NGC-5793 1 WFC3/IR MULTIAC IR-FIX F160W 1 none none none 1 N/A CUM NGC-5793 1 WFC3/IR MULTIAC IR-FIX F160W 2 none none none 1 N/A CUM NGC-5793 2 WFC3/UVI ACCUM UVIS-FIX F475W 1 none none none 2 N/A S NGC-5793 2 WFC3/UVI ACCUM UVIS-FIX F475W 2 none none none 2 N/A S NGC-5793 3 WFC3/UVI ACCUM UVIS-FIX F775W 1 none none none 2 N/A S NGC-5793 3 WFC3/UVI ACCUM UVIS-FIX F775W 2 none none none 2 N/A S 11832( 2) - 24-Oct-2008 17:52:39 - [ 6] Summary Form for Proposal 11832 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures IR-FIX, UVIS-FIX ------------------------------------------------------------------------------------------------------------------------------------ Configurations WFC3/IR, WFC3/UVIS ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM, MULTIACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters CR-SPLIT=NO, NSAMP=14, SAMP-SEQ=SPARS100 ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements PATTERN 1 1, PATTERN 2 2-3 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F160W, F475W, F775W ------------------------------------------------------------------------------------------------------------------------------------ Target Names NGC-5793 ------------------------------------------------------------------------------------------------------------------------------------