8256( 10) - 03/21/00 14:49 - [ 1] PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only ID: 8256 Version: 10 Check-in Date: 21-Mar-2000 14:47:21 1.Proposal Title: Deep Helium-Mixing and the Ultraviolet Spectra of Hot Horizontal Branch Stars ------------------------------------------------------------------------------------ 2. Proposal For 3. Cycle GO 8 ------------------------------------------------------------------------------------ 4. Investigators Contact? PI: Wayne Landsman Raytheon Technical Services Company CoI: Dr. Thierry Lanz U. of Maryland/Goddard N CoI: Dr. Marcio Catelan^\dag NASA Goddard Space Flight Center N CoI: Dr. Frank Grundahl Herzberg Institute of Astrophysics N CoI: Dr. Allen Sweigart NASA Goddard Space Flight Center N CoI: Dr. Charles Proffitt Computer Science Corporation N ------------------------------------------------------------------------------------ 5. Abstract There is now good evidence that the luminosities and gravities of hot horizontal branch (HB) stars in globular clusters are not correctly described by canonical models of core helium- burning stars. Observations of HB stars in the critical temperature range 4.2<\log T(eff)<4.3 consistently yield gravities about 0.4 dex lower, and Stroemgren u magnitudes about 0.4 mag brighter, than canonical predictions. One possible explanation is provided by Sweigart's (1997) non- canonical models, in which the HB envelope helium abundance is enhanced due to prior deep mixing along the red giant branch. The existence of helium mixing would have important implications for long-standing problems, such as the origin of the HB morphology and the RR Lyrae distance scale. However, the critical HB T(eff) range is also where diffusion models predict a large metal overabundance (due to radiative levitation) in the photospheres of the slowly-rotating HB stars. A large metal overabundance ( Fe/H > 0 ) could explain the observed Stroemgren u and \logg anomalies, but would also predict distinctive UV spectra characterized by strong metal absorption lines. We propose to ascertain the degree to which radiative levitation affects the observational properties of blue HB stars by obtaining STIS low-dispersion UV spectra of 9 hot HB stars in NGC 6752. This will permit us to disentangle the effects of helium mixing and radiative levitation upon HB properties. ------------------------------------------------------------------------------------ 8256( 10) - 03/21/00 14:49 - [ 2] Observations Description ------------------------ We used several criteria for the target selection of hot HB stars in NGC 6752. First, we want to sample the full temperature range of the Stroemgren u and gravity anomalies, including ``normal'' stars just outside the temperature range of the anomalies. We gave preference to stars with good ultraviolet photometry from the UIT images, and for which there is existing optical spectroscopy. Finally, we picked HB stars which are the brightest stars within a surrounding 5" * 5" field, in order to avoid any possible problem with STIS target acquisition. Table 1 gives the parameters of the nine selected targets, including the identification number from Buonanno et al. (1986), the observed 1620 Angstrom\ flux from the UIT photometry, and either the T(eff) and \logg values as derived from Balmer line spectroscopy, or the T(eff) value derived from Stroemgren photometry We will use the 52 * 0.2 aperture, which should give good photometry and avoid the need for a target peak u p . We estimated the expected S/N using the STIS exposure time calculator, by using a B5V model spectrum with a reddening of E(\bv) = 0.05, and normalizing to the typical 1620 Angstrom\ flux of 1.6 * 10^-14, erg, cm^-2, s^-1, Angstrom^-1. With 40m exposures in G140L and G230L we expect to achieve a S/N > 30 over most of the 1150 - 3100 Angstrom\ wavelength region. The HST archives currently do not contain any WFPC2 Wood's filter (F160W) ultraviolet images of NGC 6752, and our STIS pointings provide an opportunity to obtain such images as coordinated parallels. Comparison of the WFPC2 F160W and UIT photometry in NGC 6752 with the STIS low-dispersion spectra should help resolve some of the calibration discrepancies that appear to exist between the two ultraviolet imaging instruments. The proper interpretation of these spectra will require the variety of skills available to the proposal team. Landsman has specialized in the analysis of ultraviolet spectra of hot low-ma ss stars, and supports the STIS instrument development team a t Goddard. Grundahl is performing a Stroemgren and HBeta photometry survey of globular clusters that has already shown the ubiquitous presence of the Stroemgren u luminosity jump (Grundahl et al. 1998a, b). Proffitt has computed radiative levitation rates in his analysis of the peculiar A- and B-type stars. Lanz helped develop the widely used TLUSTY non-LTE model atmosphere program, and has extensively studied the ultraviolet spectra of peculiar A and B stars along the main sequence (Lanz et al.\ 1996). Sweigart has computed numerous HB interior models with and without helium- mixing, and Catelan has developed statistical techniques to assess the reality of noncanonical features in globular cluster CMDs. Real Time Justification ----------------------- NGC 6752 has good CVZ visibility and we request CVZ time for all nine targets. Calibration Justification ------------------------- Additional Comments ------------------- ------------------------------------------------------------------------------------ 8256( 10) - 03/21/00 14:49 - [ 3] Data Distribution Paper Products: NO Media: ELECTRONIC Blocking Factor: 10 Ship To: PI_Address Ship Via: Email: ------------------------------------------------------------------------------------ 8256( 10) - 03/21/00 14:49 - [ 4] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 10 NGC6752- STAR, STELLAR CLUSTER RA=19H 10M 56.59S +/- 0.5", DEC= J2000 V = 14.27 B2454 -60D 5' 25.7" +/- 0.5", PLATE- E(B-V) = 0.04 ID=03D3 F-CONT(1620)=1.4+/-0.2e-14 B-V = -0.06 Comments: Star ID from Buonanno et al. (1986, A&AS, 66, 79) 1620 A flux from UIT photometry 20 NGC6752- STAR, STELLAR CLUSTER RA=19H 10M 50.04S +/- 0.5", DEC= J2000 V = 14.43 B2735 -60D 4' 7.5" +/- 0.5", PLATE- E(B-V) = 0.04 ID=03D3 F-CONT(1620)=1.6+/-0.2e-14 B-V = 0.03 Comments: Star ID from Buonanno et al. (1986, A&AS, 66, 79) 1620 A flux from UIT photometry 50 NGC6752- STAR, STELLAR CLUSTER RA=19H 10M 50.80S +/- 0.5", DEC= J2000 V = 15.20 B2698 -60D 2' 38.6" +/- 0.5", PLATE- E(B-V) = 0.04 ID=03D3 F-CONT(1620)=1.8+/-0.2e-14 B-V = -0.056 Comments: Star ID from Buonanno et al. (1986, A&AS, 66, 79) 1620 A flux from UIT photometry 60 NGC6752- STAR, STELLAR CLUSTER RA=19H 11M 14.42S +/- 0.5", DEC= J2000 V = 15.52 B1509 -59D 54' 47.9" +/- 0.5", PLATE- E(B-V) = 0.04 ID=03D3 F-CONT(1620)=1.7+/-0.2e-14 B-V = -0.086 Comments: Star ID from Buonanno et al. (1986, A&AS, 66, 79) 1620 A flux from UIT photometry 70 NGC6752- STAR, STELLAR CLUSTER RA=19H 11M 3.13S +/- 0.5", DEC=- J2000 V = 15.88 B2099 59D 55' 54.6" +/- 0.5", PLATE- E(B-V) = 0.04 ID=03D3 F-CONT(1620)=1.7+/-0.2e-14 B-V = -0.09 Comments: Star ID from Buonanno et al. (1986, A&AS, 66, 79) 1620 A flux from UIT photometry 80 NGC6752- STAR, STELLAR CLUSTER RA=19H 10M 30.21S +/- 0.5", DEC= J2000 V = 16.05 B3699 -59D 58' 23.79" +/- 0.5", PLATE- E(B-V) = 0.04 ID=03D3 F-CONT(1620)=1.7+/-0.2e-14 B-V = -0.07 Comments: Star ID from Buonanno et al. (1986, A&AS, 66, 79) 1620 A flux from UIT photometry 90 NGC6752- STAR, HORIZONTAL BRANCH RA=19H 10M 12.18S +/- 0.5", DEC= J2000 V = 16.60 B4548 STAR -59D 51' 55.3" +/- 0.5", PLATE- E(B-V) = 0.04 ID=03D3 F-CONT(1620)=1.9+/-0.2e-14 B-V = -0.14 Comments: Star ID from Buonanno et al. (1986, A&AS, 66, 79) 1620 A flux from UIT photometry 100 NGC6752- STAR, HORIZONTAL BRANCH RA=19H 11M 1.07S +/- 0.5", DEC=- J2000 V = 14.41 B2206 STAR 59D 57' 41.8" +/- 0.5", PLATE- E(B-V) = 0.04 ID=03D3 F-CONT(1620)=1.5+/-0.2e-14 B-V = 0.00 Comments: Star ID from Buonanno et al. (1986, A&AS, 66, 79) 1620 A flux from UIT photometry 8256( 10) - 03/21/00 14:49 - [ 5] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 110 NGC6752-B652 STAR, HORIZONTAL BRANCH RA=19H 11M 31.63S +/- 0.5", DEC= J2000 V = 14.74 STAR -59D 54' 51.9" +/- 0.5", PLATE- E(B-V) = 0.04 ID=03D3 F-CONT(1620)=1.5+/-0.2e-14 B-V = -0.04 Comments: Star ID from Buonanno et al. (1986, A&AS, 66, 79) 1620 A flux from UIT photometry 210 NGC6752-B652 STAR, HORIZONTAL BRANCH RA=19H 11M 31.63S +/- 0.5", DEC= J2000 V = 14.74 -TWO STAR -59D 57' 51.9" +/- 0.5", PLATE- E(B-V) = 0.04 ID=03D3 F-CONT(1620)=1.5+/-0.2e-14 B-V = -0.04 Comments: Star ID from Buonanno et al. (1986, A&AS, 66, 79) 1620 A flux from UIT photometry 8256( 10) - 03/21/00 14:49 - [ 6] Visit: 01 Visit Priority: Visit Requirements: CVZ 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 ------------------------------------------------------------------------------------------------------------------------------------ 10 NGC6752-B24 STIS/C ACQ F28X50L MIRROR 1 1.0 S 54 CD P ------------------------------------------------------------------------------------------------------------------------------------ 20 NGC6752-B24 STIS/F ACCUM 52X0.2 G140L 1425 1 35 M PAR 40-80 WITH 20-30 54 UV-MAM A ------------------------------------------------------------------------------------------------------------------------------------ 30 NGC6752-B24 STIS/N ACCUM 52X0.2 G230L 2376 1 34 M 54 UV-MAM A ------------------------------------------------------------------------------------------------------------------------------------ 40 ANY WFPC2 IMAGE WFALL F255W 1 90 S ------------------------------------------------------------------------------------------------------------------------------------ 50 ANY WFPC2 IMAGE WFALL F555W 1 2 S ------------------------------------------------------------------------------------------------------------------------------------ 55 ANY WFPC2 IMAGE WFALL F555W 1 20 S ------------------------------------------------------------------------------------------------------------------------------------ 60 ANY WFPC2 IMAGE WFALL F336W 1 60 S ------------------------------------------------------------------------------------------------------------------------------------ 65 ANY WFPC2 IMAGE WFALL F336W 1 600 S ------------------------------------------------------------------------------------------------------------------------------------ 70 ANY WFPC2 IMAGE WFALL F439W 1 24 S ------------------------------------------------------------------------------------------------------------------------------------ 75 ANY WFPC2 IMAGE WFALL F439W 1 240 S ------------------------------------------------------------------------------------------------------------------------------------ 80 ANY WFPC2 IMAGE WFALL F160BW 1 2100 S ------------------------------------------------------------------------------------------------------------------------------------ 8256( 10) - 03/21/00 14:49 - [ 7] Visit: 02 Visit Priority: Visit Requirements: CVZ 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 ------------------------------------------------------------------------------------------------------------------------------------ 110 NGC6752-B27 STIS/C ACQ F28X50L MIRROR 1 1.5 S 35 CD P ------------------------------------------------------------------------------------------------------------------------------------ 120 NGC6752-B27 STIS/F ACCUM 52X0.2 G140L 1425 1 35 M PAR 140-180 WITH 120-130 35 UV-MAM A ------------------------------------------------------------------------------------------------------------------------------------ 130 NGC6752-B27 STIS/N ACCUM 52X0.2 G230L 2376 1 34 M 35 UV-MAM A ------------------------------------------------------------------------------------------------------------------------------------ 140 ANY WFPC2 IMAGE WFALL F255W 1 90 S ------------------------------------------------------------------------------------------------------------------------------------ 150 ANY WFPC2 IMAGE WFALL F555W 1 2 S ------------------------------------------------------------------------------------------------------------------------------------ 155 ANY WFPC2 IMAGE WFALL F555W 1 20 S ------------------------------------------------------------------------------------------------------------------------------------ 160 ANY WFPC2 IMAGE WFALL F336W 1 60 S ------------------------------------------------------------------------------------------------------------------------------------ 165 ANY WFPC2 IMAGE WFALL F336W 1 600 S ------------------------------------------------------------------------------------------------------------------------------------ 170 ANY WFPC2 IMAGE WFALL F439W 1 24 S ------------------------------------------------------------------------------------------------------------------------------------ 175 ANY WFPC2 IMAGE WFALL F439W 1 240 S ------------------------------------------------------------------------------------------------------------------------------------ 180 ANY WFPC2 IMAGE WFALL F160BW 1 2100 S ------------------------------------------------------------------------------------------------------------------------------------ 8256( 10) - 03/21/00 14:49 - [ 8] Visit: 03 Visit Priority: Visit Requirements: CVZ 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 ------------------------------------------------------------------------------------------------------------------------------------ 210 NGC6752-B22 STIS/C ACQ F28X50L MIRROR 1 1.5 S 06 CD P ------------------------------------------------------------------------------------------------------------------------------------ 220 NGC6752-B22 STIS/F ACCUM 52X0.2 G140L 1425 1 35 M PAR 250-280 WITH 220-230 06 UV-MAM A ------------------------------------------------------------------------------------------------------------------------------------ 230 NGC6752-B22 STIS/N ACCUM 52X0.2 G230L 2376 1 34 M 06 UV-MAM A ------------------------------------------------------------------------------------------------------------------------------------ 250 ANY WFPC2 IMAGE WFALL F555W ATD-GAIN=15 1 2 S ------------------------------------------------------------------------------------------------------------------------------------ 255 ANY WFPC2 IMAGE WFALL F555W ATD-GAIN=15 2 20 S ------------------------------------------------------------------------------------------------------------------------------------ 260 ANY WFPC2 IMAGE WFALL F336W ATD-GAIN=15 1 60 S ------------------------------------------------------------------------------------------------------------------------------------ 265 ANY WFPC2 IMAGE WFALL F336W ATD-GAIN=15,CR-SPLIT=0.5 1 600 S ------------------------------------------------------------------------------------------------------------------------------------ 270 ANY WFPC2 IMAGE WFALL F439W ATD-GAIN=15 1 22 S ------------------------------------------------------------------------------------------------------------------------------------ 275 ANY WFPC2 IMAGE WFALL F439W ATD-GAIN=15,CR-SPLIT=0.5 1 220 S ------------------------------------------------------------------------------------------------------------------------------------ 280 ANY WFPC2 IMAGE WFALL F255W CR-SPLIT=NO 3 640 S ------------------------------------------------------------------------------------------------------------------------------------ 8256( 10) - 03/21/00 14:49 - [ 9] Visit: 04 Visit Priority: Visit Requirements: CVZ 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 ------------------------------------------------------------------------------------------------------------------------------------ 310 NGC6752-B65 STIS/C ACQ F28X50L MIRROR 1 2 S 2 CD P ------------------------------------------------------------------------------------------------------------------------------------ 320 NGC6752-B65 STIS/F ACCUM 52X0.2 G140L 1425 1 35 M PAR 350-380 WITH 320-330 2 UV-MAM A ------------------------------------------------------------------------------------------------------------------------------------ 330 NGC6752-B65 STIS/N ACCUM 52X0.2 G230L 2376 1 34 M 2 UV-MAM A ------------------------------------------------------------------------------------------------------------------------------------ 350 ANY WFPC2 IMAGE WFALL F555W ATD-GAIN=15 1 2 S ------------------------------------------------------------------------------------------------------------------------------------ 355 ANY WFPC2 IMAGE WFALL F555W ATD-GAIN=15 2 20 S ------------------------------------------------------------------------------------------------------------------------------------ 360 ANY WFPC2 IMAGE WFALL F336W ATD-GAIN=15 1 60 S ------------------------------------------------------------------------------------------------------------------------------------ 365 ANY WFPC2 IMAGE WFALL F336W ATD-GAIN=15,CR-SPLIT=0.5 1 600 S ------------------------------------------------------------------------------------------------------------------------------------ 370 ANY WFPC2 IMAGE WFALL F439W ATD-GAIN=15 1 22 S ------------------------------------------------------------------------------------------------------------------------------------ 375 ANY WFPC2 IMAGE WFALL F439W ATD-GAIN=15,CR-SPLIT=0.5 1 220 S ------------------------------------------------------------------------------------------------------------------------------------ 380 ANY WFPC2 IMAGE WFALL F255W CR-SPLIT=NO 3 640 S ------------------------------------------------------------------------------------------------------------------------------------ 8256( 10) - 03/21/00 14:49 - [ 10] Visit: 05 Visit Priority: Visit Requirements: CVZ 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 ------------------------------------------------------------------------------------------------------------------------------------ 410 NGC6752-B26 STIS/C ACQ F28X50L MIRROR 1 2.5 S 98 CD P ------------------------------------------------------------------------------------------------------------------------------------ 420 NGC6752-B26 STIS/F ACCUM 52X0.2 G140L 1425 1 35 M PAR 450-480 WITH 420-430 98 UV-MAM A ------------------------------------------------------------------------------------------------------------------------------------ 430 NGC6752-B26 STIS/N ACCUM 52X0.2 G230L 2376 1 34 M 98 UV-MAM A ------------------------------------------------------------------------------------------------------------------------------------ 450 ANY WFPC2 IMAGE WFALL F555W ATD-GAIN=15 1 2 S ------------------------------------------------------------------------------------------------------------------------------------ 455 ANY WFPC2 IMAGE WFALL F555W ATD-GAIN=15 2 20 S ------------------------------------------------------------------------------------------------------------------------------------ 460 ANY WFPC2 IMAGE WFALL F336W ATD-GAIN=15 1 60 S ------------------------------------------------------------------------------------------------------------------------------------ 465 ANY WFPC2 IMAGE WFALL F336W ATD-GAIN=15,CR-SPLIT=0.5 1 600 S ------------------------------------------------------------------------------------------------------------------------------------ 470 ANY WFPC2 IMAGE WFALL F439W ATD-GAIN=15 1 22 S ------------------------------------------------------------------------------------------------------------------------------------ 475 ANY WFPC2 IMAGE WFALL F439W ATD-GAIN=15,CR-SPLIT=0.5 1 220 S ------------------------------------------------------------------------------------------------------------------------------------ 480 ANY WFPC2 IMAGE WFALL F255W CR-SPLIT=NO 3 640 S ------------------------------------------------------------------------------------------------------------------------------------ 8256( 10) - 03/21/00 14:49 - [ 11] Visit: 06 Visit Priority: Visit Requirements: CVZ 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 ------------------------------------------------------------------------------------------------------------------------------------ 510 NGC6752-B15 STIS/C ACQ F28X50L MIRROR 1 3.5 S 09 CD P ------------------------------------------------------------------------------------------------------------------------------------ 520 NGC6752-B15 STIS/F ACCUM 52X0.2 G140L 1425 1 35 M PAR 550-580 WITH 520-530 09 UV-MAM A ------------------------------------------------------------------------------------------------------------------------------------ 530 NGC6752-B15 STIS/N ACCUM 52X0.2 G230L 2376 1 34 M 09 UV-MAM A ------------------------------------------------------------------------------------------------------------------------------------ 550 ANY WFPC2 IMAGE WFALL F555W ATD-GAIN=15 1 2 S ------------------------------------------------------------------------------------------------------------------------------------ 555 ANY WFPC2 IMAGE WFALL F555W ATD-GAIN=15 2 20 S ------------------------------------------------------------------------------------------------------------------------------------ 560 ANY WFPC2 IMAGE WFALL F336W ATD-GAIN=15 1 60 S ------------------------------------------------------------------------------------------------------------------------------------ 565 ANY WFPC2 IMAGE WFALL F336W ATD-GAIN=15,CR-SPLIT=0.5 1 600 S ------------------------------------------------------------------------------------------------------------------------------------ 570 ANY WFPC2 IMAGE WFALL F439W ATD-GAIN=15 1 22 S ------------------------------------------------------------------------------------------------------------------------------------ 575 ANY WFPC2 IMAGE WFALL F439W ATD-GAIN=15,CR-SPLIT=0.5 1 220 S ------------------------------------------------------------------------------------------------------------------------------------ 580 ANY WFPC2 IMAGE WFALL F255W CR-SPLIT=NO 3 640 S ------------------------------------------------------------------------------------------------------------------------------------ 8256( 10) - 03/21/00 14:49 - [ 12] Visit: 07 Visit Priority: Visit Requirements: CVZ 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 ------------------------------------------------------------------------------------------------------------------------------------ 610 NGC6752-B20 STIS/C ACQ F28X50L MIRROR 1 4 S 99 CD P ------------------------------------------------------------------------------------------------------------------------------------ 620 NGC6752-B20 STIS/F ACCUM 52X0.2 G140L 1425 1 35 M PAR 650-680 WITH 620-630 99 UV-MAM A ------------------------------------------------------------------------------------------------------------------------------------ 630 NGC6752-B20 STIS/N ACCUM 52X0.2 G230L 2376 1 34 M 99 UV-MAM A ------------------------------------------------------------------------------------------------------------------------------------ 650 ANY WFPC2 IMAGE WFALL F555W ATD-GAIN=15 1 2 S ------------------------------------------------------------------------------------------------------------------------------------ 655 ANY WFPC2 IMAGE WFALL F555W ATD-GAIN=15 2 20 S ------------------------------------------------------------------------------------------------------------------------------------ 660 ANY WFPC2 IMAGE WFALL F336W ATD-GAIN=15 1 60 S ------------------------------------------------------------------------------------------------------------------------------------ 665 ANY WFPC2 IMAGE WFALL F336W ATD-GAIN=15,CR-SPLIT=0.5 1 600 S ------------------------------------------------------------------------------------------------------------------------------------ 670 ANY WFPC2 IMAGE WFALL F439W ATD-GAIN=15 1 22 S ------------------------------------------------------------------------------------------------------------------------------------ 675 ANY WFPC2 IMAGE WFALL F439W ATD-GAIN=15,CR-SPLIT=0.5 1 220 S ------------------------------------------------------------------------------------------------------------------------------------ 680 ANY WFPC2 IMAGE WFALL F255W CR-SPLIT=NO 3 640 S ------------------------------------------------------------------------------------------------------------------------------------ 8256( 10) - 03/21/00 14:49 - [ 13] Visit: 08 Visit Priority: Visit Requirements: CVZ 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 ------------------------------------------------------------------------------------------------------------------------------------ 710 NGC6752-B36 STIS/C ACQ F28X50L MIRROR 1 5 S 99 CD P ------------------------------------------------------------------------------------------------------------------------------------ 720 NGC6752-B36 STIS/F ACCUM 52X0.2 G140L 1425 1 35 M PAR 750-780 WITH 720-730 99 UV-MAM A ------------------------------------------------------------------------------------------------------------------------------------ 730 NGC6752-B36 STIS/N ACCUM 52X0.2 G230L 2376 1 34 M 99 UV-MAM A ------------------------------------------------------------------------------------------------------------------------------------ 750 ANY WFPC2 IMAGE WFALL F555W ATD-GAIN=15 1 2 S ------------------------------------------------------------------------------------------------------------------------------------ 755 ANY WFPC2 IMAGE WFALL F555W ATD-GAIN=15 2 20 S ------------------------------------------------------------------------------------------------------------------------------------ 760 ANY WFPC2 IMAGE WFALL F336W ATD-GAIN=15 1 60 S ------------------------------------------------------------------------------------------------------------------------------------ 765 ANY WFPC2 IMAGE WFALL F336W ATD-GAIN=15,CR-SPLIT=0.5 1 600 S ------------------------------------------------------------------------------------------------------------------------------------ 770 ANY WFPC2 IMAGE WFALL F439W ATD-GAIN=15 1 22 S ------------------------------------------------------------------------------------------------------------------------------------ 775 ANY WFPC2 IMAGE WFALL F439W ATD-GAIN=15,CR-SPLIT=0.5 1 220 S ------------------------------------------------------------------------------------------------------------------------------------ 780 ANY WFPC2 IMAGE WFALL F255W CR-SPLIT=NO 3 640 S ------------------------------------------------------------------------------------------------------------------------------------ 8256( 10) - 03/21/00 14:49 - [ 14] Visit: 09 Visit Priority: Visit Requirements: CVZ 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 ------------------------------------------------------------------------------------------------------------------------------------ 810 NGC6752-B45 STIS/C ACQ F28X50L MIRROR 1 5 S 48 CD P ------------------------------------------------------------------------------------------------------------------------------------ 820 NGC6752-B45 STIS/F ACCUM 52X0.2 G140L 1425 1 35 M PAR 850-880 WITH 820-830 48 UV-MAM A ------------------------------------------------------------------------------------------------------------------------------------ 830 NGC6752-B45 STIS/N ACCUM 52X0.2 G230L 2376 1 34 M 48 UV-MAM A ------------------------------------------------------------------------------------------------------------------------------------ 850 ANY WFPC2 IMAGE WFALL F555W ATD-GAIN=15 1 2 S ------------------------------------------------------------------------------------------------------------------------------------ 855 ANY WFPC2 IMAGE WFALL F555W ATD-GAIN=15 2 20 S ------------------------------------------------------------------------------------------------------------------------------------ 860 ANY WFPC2 IMAGE WFALL F336W ATD-GAIN=15 1 60 S ------------------------------------------------------------------------------------------------------------------------------------ 865 ANY WFPC2 IMAGE WFALL F336W ATD-GAIN=15,CR-SPLIT=0.5 1 600 S ------------------------------------------------------------------------------------------------------------------------------------ 870 ANY WFPC2 IMAGE WFALL F439W ATD-GAIN=15 1 22 S ------------------------------------------------------------------------------------------------------------------------------------ 875 ANY WFPC2 IMAGE WFALL F439W ATD-GAIN=15,CR-SPLIT=0.5 1 220 S ------------------------------------------------------------------------------------------------------------------------------------ 880 ANY WFPC2 IMAGE WFALL F255W CR-SPLIT=NO 3 640 S ------------------------------------------------------------------------------------------------------------------------------------ 8256( 10) - 03/21/00 14:49 - [ 15] Visit: 13 Visit Priority: Visit Requirements: CVZ 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 ------------------------------------------------------------------------------------------------------------------------------------ 210 NGC6752-B65 STIS/C ACQ F28X50L MIRROR 1 1.5 S 2-TWO CD P ------------------------------------------------------------------------------------------------------------------------------------ 220 NGC6752-B65 STIS/F ACCUM 52X0.2 G140L 1425 1 35 M PAR 250-280 WITH 220-230 2-TWO UV-MAM A ------------------------------------------------------------------------------------------------------------------------------------ 230 NGC6752-B65 STIS/N ACCUM 52X0.2 G230L 2376 1 34 M 2-TWO UV-MAM A ------------------------------------------------------------------------------------------------------------------------------------ 250 ANY WFPC2 IMAGE WFALL F555W ATD-GAIN=15 1 2 S ------------------------------------------------------------------------------------------------------------------------------------ 255 ANY WFPC2 IMAGE WFALL F555W ATD-GAIN=15 2 20 S ------------------------------------------------------------------------------------------------------------------------------------ 260 ANY WFPC2 IMAGE WFALL F336W ATD-GAIN=15 1 60 S ------------------------------------------------------------------------------------------------------------------------------------ 265 ANY WFPC2 IMAGE WFALL F336W ATD-GAIN=15,CR-SPLIT=0.5 1 600 S ------------------------------------------------------------------------------------------------------------------------------------ 270 ANY WFPC2 IMAGE WFALL F439W ATD-GAIN=15 1 22 S ------------------------------------------------------------------------------------------------------------------------------------ 275 ANY WFPC2 IMAGE WFALL F439W ATD-GAIN=15,CR-SPLIT=0.5 1 220 S ------------------------------------------------------------------------------------------------------------------------------------ 280 ANY WFPC2 IMAGE WFALL F255W CR-SPLIT=NO 3 640 S ------------------------------------------------------------------------------------------------------------------------------------ 8256( 10) - 03/21/00 14:49 - [ 16] Summary Form for Proposal 8256 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures F28X50LP 52X0.2 WFALL ------------------------------------------------------------------------------------------------------------------------------------ Configurations STIS/CCD STIS/FUV-MAMA STIS/NUV-MAMA WFPC2 ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACQ ACCUM IMAGE ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters ATD-GAIN=15 CR-SPLIT=0.5 CR-SPLIT=NO ------------------------------------------------------------------------------------------------------------------------------------ Proposal Category GO ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements CVZ PAR 40-80 WITH 20-30 PAR 140-180 WITH 120-130 PAR 250-280 WITH 220-230 PAR 350-380 WITH 320-330 PAR 450-480 WITH 420-430 PAR 550-580 WITH 520-530 PAR 650-680 WITH 620-630 PAR 750-780 WITH 720-730 PAR 850-880 WITH 820-830 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements MIRROR G140L G230L F255W F555W F336W F439W F160BW ------------------------------------------------------------------------------------------------------------------------------------ Target Names NGC6752-B2454 ANY NGC6752-B2735 NGC6752-B2206 NGC6752-B652 NGC6752-B2698 NGC6752-B1509 NGC6752-B2099 NGC6752-B3699 NGC6752-B4548 NGC6752-B652-TWO ------------------------------------------------------------------------------------------------------------------------------------ Wavelengths 1425 2376 ------------------------------------------------------------------------------------------------------------------------------------