9804( 4) - 05/16/03 13:01 - [ 1] PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only ID: 9804 Version: 4 Check-in Date: 16-May-2003 12:59:16 1.Proposal Title: Experimental Proof of the Neutrino Process in SN from Boron Isotope Measurements ------------------------------------------------------------------------------------ 2. Proposal For 3. Cycle GO 12 ------------------------------------------------------------------------------------ 4. Investigators Contact? PI: Dr. Douglas K. Duncan University of Colorado at Boulder ------------------------------------------------------------------------------------ 5. Abstract The light elements Li, Be, and B are formed in the Big Bang (Li) and by Cosmic Ray (CR) spallation. But the abudance of 11B has never been satisfactorily explained: 11B/10B in the solar system is 4.0, CR spallation predicts 2.5. There needs to be another source of 11B. Woosely et al. (1990) predict the large flux of neutrinos in Type II supernovae will sythesize elements, including converting 12C to 11B. This "neutrino process" has never been experimentally verified. A "smoking gun" would be to find a metal poor star whose elements came primarily from Type II SN and whose B is pure 11B -- only the neutrino process could produce that. In a previous cycle we obtained STIS measurements of a metal poor star and were able to clearly show that 11B/10B <= 4. We now ask for additional observations of higher S/N, which can distinguish if 11B/10B = 4, or if the mix is pure 11B. In either case we will end up with a precise measure of how much 11B in old stars is NOT produced by CRs, and likely due to SN, and can place a new constraint on the temperature and density of SN models in the region where neutrino-induced nucleosynthesis is thought to take place. Although this test could be made in a single star, we ask to observe two, to increase the confidence in what is a subtle isotopic measurement. We propose to observe the brightest two suitable metal poor stars. One is in the CVZ. ------------------------------------------------------------------------------------ 9804( 4) - 05/16/03 13:01 - [ 2] Observations Description ------------------------ We propose to observe two stars, HD76932 and HD211998, at higher resolution (STIS echelle) and S/N (100) than has previously been done. Since both stars have been observed at lower resolution with HST we know their UV flux very well. HD211998 is in the CVZ and we expect to use only 5 orbits rather than 10 for it. The S/N achieved previously, 45, was limited by photon statistics, not nonuniformities in the MAMA photocathode. To achieve S/N = 100 we will be especially careful of such nonuniformities. First, at echelle dispersion, the velocity of HST already shifts the spectrum by about 10 hi-res pixels, smoothing the photocathode response. Second, we will ask to use the FP SPLIT SLITS which take spectra in five different places on the photocathode. Assuming sufficient photon statistics, this should increase our S/N by sqrt{5}. The stars we have chosen are about 5X as bright as those we observed in Cycle 8 so results from each of the five apertures should be as good as our HD94028 results. The average of all 5 should give us the S/N we seek. Real Time Justification ----------------------- Calibration Justification ------------------------- Additional Comments ------------------- ------------------------------------------------------------------------------------ 9804( 4) - 05/16/03 13:01 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 HD76932 STAR, HALO RA=08H58M43.93S +/- 0.1", DEC=- J2000 V = V = 5.86+/-0.02 16D07'57.9" +/- 0.1" 120.8 F(2090)=3+/-1e-12 Coordinate Source: HIPPARCOS_INPUT_CATALOGUE Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) 2000.0 0.0169 0.213 0.0469 2 HD211998 STAR, HALO RA=22H24M37.0S +/- 0.5", DEC=- J2000 V = 20.5 V = 5.29 72D15'20.0" +/- 0.5" F(2500)=3.5+/-1e-12 Coordinate Source: HIPPARCOS_INPUT_CATALOGUE Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) 2000.0 0.29 -0.69 0.03 9804( 4) - 05/16/03 13:01 - [ 4] Visit: 01 Visit Priority: Visit Requirements: On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 HD76932 STIS/C ACQ F28X50O MIRROR ACQTYPE=POINT 1 0.2 S CD II ------------------------------------------------------------------------------------------------------------------------------------ 2 HD76932 STIS/C ACQ/PEA 0.2X0.0 G430L 4300 1 1 S CD K 9 ------------------------------------------------------------------------------------------------------------------------------------ 3 HD76932 STIS/N ACCUM 0.2X0.0 E230H 2013 1 1860 S UV-MAM 9 A ------------------------------------------------------------------------------------------------------------------------------------ 4 HD76932 STIS/N ACCUM 0.2X0.0 E230H 2013 1 2877 S UV-MAM 9 A ------------------------------------------------------------------------------------------------------------------------------------ 5 HD76932 STIS/N ACCUM 0.2X0.0 E230H 2013 1 2877 S UV-MAM 9 A ------------------------------------------------------------------------------------------------------------------------------------ 6 HD76932 STIS/N ACCUM 0.2X0.0 E230H 2013 1 2877 S UV-MAM 9 A ------------------------------------------------------------------------------------------------------------------------------------ 7 HD76932 STIS/N ACCUM 0.2X0.0 E230H 2013 1 2877 S UV-MAM 9 A ------------------------------------------------------------------------------------------------------------------------------------ 9804( 4) - 05/16/03 13:01 - [ 5] Visit: 02 Visit Priority: Visit Requirements: On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 HD76932 STIS/C ACQ F28X50O MIRROR ACQTYPE=POINT 1 0.2 S CD II ------------------------------------------------------------------------------------------------------------------------------------ 2 HD76932 STIS/C ACQ/PEA 0.2X0.0 G430L 4300 1 1 S CD K 9 ------------------------------------------------------------------------------------------------------------------------------------ 3 HD76932 STIS/N ACCUM 0.2X0.0 E230H 2013 1 1860 S UV-MAM 9 A ------------------------------------------------------------------------------------------------------------------------------------ 4 HD76932 STIS/N ACCUM 0.2X0.0 E230H 2013 1 2877 S UV-MAM 9 A ------------------------------------------------------------------------------------------------------------------------------------ 5 HD76932 STIS/N ACCUM 0.2X0.0 E230H 2013 1 2877 S UV-MAM 9 A ------------------------------------------------------------------------------------------------------------------------------------ 6 HD76932 STIS/N ACCUM 0.2X0.0 E230H 2013 1 2877 S UV-MAM 9 A ------------------------------------------------------------------------------------------------------------------------------------ 9804( 4) - 05/16/03 13:01 - [ 6] Visit: 03 Visit Priority: Visit Requirements: CVZ On Hold Comments: Additional Comments: HD 21198 in CVZ Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 HD211998 STIS/C ACQ F28X50O MIRROR ACQTYPE=POINT 1 0.2 S CD II ------------------------------------------------------------------------------------------------------------------------------------ 2 HD211998 STIS/C ACQ/PEA 0.2X0.0 G430L 4300 1 1 S CD K 9 ------------------------------------------------------------------------------------------------------------------------------------ 3 HD211998 STIS/N ACCUM 0.2X0.0 E230H 2013 1 2900 S UV-MAM 9 A ------------------------------------------------------------------------------------------------------------------------------------ 4 HD211998 STIS/N ACCUM 0.2X0.0 E230H 2013 1 2900 S UV-MAM 9 A ------------------------------------------------------------------------------------------------------------------------------------ 5 HD211998 STIS/N ACCUM 0.2X0.0 E230H 2013 1 2900 S UV-MAM 9 A ------------------------------------------------------------------------------------------------------------------------------------ 6 HD211998 STIS/N ACCUM 0.2X0.0 E230H 2013 1 2900 S UV-MAM 9 A ------------------------------------------------------------------------------------------------------------------------------------ 7 HD211998 STIS/N ACCUM 0.2X0.0 E230H 2013 1 2900 S UV-MAM 9 A ------------------------------------------------------------------------------------------------------------------------------------ 9804( 4) - 05/16/03 13:01 - [ 7] Visit: 04 Visit Priority: Visit Requirements: CVZ On Hold Comments: Additional Comments: HD 21198 in CVZ Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 HD211998 STIS/C ACQ F28X50O MIRROR ACQTYPE=POINT 1 0.2 S CD II ------------------------------------------------------------------------------------------------------------------------------------ 2 HD211998 STIS/C ACQ/PEA 0.2X0.0 G430L 4300 1 1 S CD K 9 ------------------------------------------------------------------------------------------------------------------------------------ 3 HD211998 STIS/N ACCUM 0.2X0.0 E230H 2013 1 3000 S UV-MAM 9 A ------------------------------------------------------------------------------------------------------------------------------------ 4 HD211998 STIS/N ACCUM 0.2X0.0 E230H 2013 1 3000 S UV-MAM 9 A ------------------------------------------------------------------------------------------------------------------------------------ 5 HD211998 STIS/N ACCUM 0.2X0.0 E230H 2013 1 2950 S UV-MAM 9 A ------------------------------------------------------------------------------------------------------------------------------------ 6 HD211998 STIS/N ACCUM 0.2X0.0 E230H 2013 1 2950 S UV-MAM 9 A ------------------------------------------------------------------------------------------------------------------------------------ 7 HD211998 STIS/N ACCUM 0.2X0.0 E230H 2013 1 3000 S UV-MAM 9 A ------------------------------------------------------------------------------------------------------------------------------------ 9804( 4) - 05/16/03 13:01 - [ 8] Summary Form for Proposal 9804 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures F28X50OII 0.2X0.09 ------------------------------------------------------------------------------------------------------------------------------------ Configurations STIS/CCD STIS/NUV-MAMA ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACQ ACQ/PEAK ACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters ACQTYPE=POINT ------------------------------------------------------------------------------------------------------------------------------------ Proposal Category GO ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements CVZ ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements MIRROR G430L E230H ------------------------------------------------------------------------------------------------------------------------------------ Target Names HD76932 HD211998 ------------------------------------------------------------------------------------------------------------------------------------ Wavelengths 4300 2013 ------------------------------------------------------------------------------------------------------------------------------------