11191( 2) - 05/10/07 16:48 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 11191 Version: 2 Check-in Time: 10-May-2007 20:47:48 STScI Edit Number: 0 Title NICMOS Imaging of a z>4 High-Redshift Ultraluminous Submillimeter Source ------------------------------------------------------------------------------------ Type Cycle Parallel Pointing Tolerance GO 16 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Wei-Hao Wang Associated Universities, Inc. CoI: Dr. Lennox L. Cowie University of Hawaii N CoI: Dr. Amy J. Barger University of Wisconsin - Madison N ------------------------------------------------------------------------------------ Abstract We propose 16 orbits of deep NICMOS 1.6 um imaging of GOODS850-5, a unique z>4 candidate SCUBA source that is bright in the submillimeter (submm) but extremely faint at all other wavelengths. GOODS850-5 is a 11 mJy 850 um source discovered in our GOODS-N SCUBA survey. It does not have a radio counterpart and its accurate location was recently determined with the SMA interferometer. It is not detected by the GOODS-N HST ACS imaging and is just above the detection limit of the ultradeep Spitzer imaging at 3.6-24 um. Its faint radio flux and its Spitzer color suggest a redshift of z>4, and potentially even z>6. It has an incredible star formation rate of ~1000 solar mass per year, and it can quickly grow into a >10^11 solar mass massive galaxy. Radio faint submm sources like GOODS850-5 may be a new population of high-redshift massive galaxies that are not picked up by any of the previous optical, near-IR, and radio surveys, and therefore it is crucial to obtain the redshift of GOODS850-5. However, because of its extreme optical faintness, the only way to constrain its redshift is photometric redshift with the existing Spitzer photometry and the proposed NICMOS 1.6 um photometry. NICMOS is the only instrument that can provide information about its redshift and morphology among all space-based and ground-based instruments at all wavelengths. The proposed observation will provide unique insight on galaxy evolution and mass assembly at high redshift. ------------------------------------------------------------------------------------ 11191( 2) - 05/10/07 16:48 - [ 2] Observations Description ------------------------ This observation is to obtain a deep 1.6 um integration on a faint, high- redshift galaxy in the HDF-N flanking field with 16 orbits. Because the 1.6 um background in the HDF-N is low, each exposure is set to be as long as the visibility period in an orbit, to minimize the contribution of read noise. Therefore there will be only 16 exposures. The 16 exposures are dithered with 4.1 arcsec spacing, forming a square 4x4 pattern with a total width of 12.3 arcsec. The 16 orbits are divided into 4 visits; each visit contains 4 orbits. Real Time Justification ----------------------- As recommended by a NICMOS Instrument Scientist (Nor Pirzkal), we request SAA- free orbits to avoid SAA-persistence noise hit. Calibration Justification ------------------------- Additional Comments ------------------- ------------------------------------------------------------------------------------ 11191( 2) - 05/10/07 16:48 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 GOODS850-5 GALAXY, ULTRALUMINOUS RA=12H36M33.4500S +/- 1", J2000 predicted flux at 1.6um is 0.03 to 0.06 IR GAL, STARBURST, DEC=+62D14'8.60" +/- 1" uJy ( = 3.5 to 7 times 10^-21 PROTOGALAXY, HIGH erg/s/cm^2/Ang) REDSHIFT GALAXY Reference Frame: ICRS 11191( 2) - 05/10/07 16:48 - [ 4] Patterns ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 1 Primary_Pattern Secondary_Pattern Pattern_Type NIC-SPIRAL-DITH Pattern_Purpose DITHER Number_Of_Points 4 Point_Spacing 4.1 Line_Spacing Coordinate_Frame POS-TARG Pattern_Orient 0.0 Angle_Between_Sides Center_Pattern YES ------------------------------------------------------------------------------------------------------------------------------------ 11191( 2) - 05/10/07 16:48 - [ 5] Visit: 01 Visit Priority: 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 GOODS850-5 NIC3 MULTIAC NIC3 F160W SAMP-SEQ=SPARS256,NSAMP=13 1 DEF POS TARG 4.1, 4.1; CUM PATTERN 1 1 ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ GOODS850-5 1 NIC3 MULTIAC NIC3 F160W 1 none none none 1 N/A CUM GOODS850-5 1 NIC3 MULTIAC NIC3 F160W 2 none none none 2 N/A CUM GOODS850-5 1 NIC3 MULTIAC NIC3 F160W 3 none none none 3 N/A CUM GOODS850-5 1 NIC3 MULTIAC NIC3 F160W 4 none none none 4 N/A CUM 11191( 2) - 05/10/07 16:48 - [ 6] Visit: 02 Visit Priority: 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 GOODS850-5 NIC3 MULTIAC NIC3 F160W SAMP-SEQ=SPARS256,NSAMP=13 1 DEF POS TARG -4.1, 4.1; CUM PATTERN 1 1 ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ GOODS850-5 1 NIC3 MULTIAC NIC3 F160W 1 none none none 1 N/A CUM GOODS850-5 1 NIC3 MULTIAC NIC3 F160W 2 none none none 2 N/A CUM GOODS850-5 1 NIC3 MULTIAC NIC3 F160W 3 none none none 3 N/A CUM GOODS850-5 1 NIC3 MULTIAC NIC3 F160W 4 none none none 4 N/A CUM 11191( 2) - 05/10/07 16:48 - [ 7] Visit: 03 Visit Priority: 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 GOODS850-5 NIC3 MULTIAC NIC3 F160W SAMP-SEQ=SPARS256,NSAMP=13 1 DEF POS TARG 4.1,-4.1; CUM PATTERN 1 1 ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ GOODS850-5 1 NIC3 MULTIAC NIC3 F160W 1 none none none 1 N/A CUM GOODS850-5 1 NIC3 MULTIAC NIC3 F160W 2 none none none 2 N/A CUM GOODS850-5 1 NIC3 MULTIAC NIC3 F160W 3 none none none 3 N/A CUM GOODS850-5 1 NIC3 MULTIAC NIC3 F160W 4 none none none 4 N/A CUM 11191( 2) - 05/10/07 16:48 - [ 8] Visit: 04 Visit Priority: 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 GOODS850-5 NIC3 MULTIAC NIC3 F160W SAMP-SEQ=SPARS256,NSAMP=13 1 DEF POS TARG -4.1,-4.1; CUM PATTERN 1 1 ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ GOODS850-5 1 NIC3 MULTIAC NIC3 F160W 1 none none none 1 N/A CUM GOODS850-5 1 NIC3 MULTIAC NIC3 F160W 2 none none none 2 N/A CUM GOODS850-5 1 NIC3 MULTIAC NIC3 F160W 3 none none none 3 N/A CUM GOODS850-5 1 NIC3 MULTIAC NIC3 F160W 4 none none none 4 N/A CUM 11191( 2) - 05/10/07 16:48 - [ 9] Summary Form for Proposal 11191 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures NIC3 ------------------------------------------------------------------------------------------------------------------------------------ Configurations NIC3 ------------------------------------------------------------------------------------------------------------------------------------ Opmodes MULTIACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters SAMP-SEQ=SPARS256 NSAMP=13 ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements POS TARG 4.1, 4.1; PATTERN 1 1; POS TARG -4.1, 4.1; POS TARG 4.1,-4.1; POS TARG -4.1,-4.1; ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F160W ------------------------------------------------------------------------------------------------------------------------------------ Target Names GOODS850-5 ------------------------------------------------------------------------------------------------------------------------------------