Page 1 PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only ID 5359 Report Date: 18-Jul-95:17:14 Version: ********** Check-in Date: ********** 1.Proposal Title: SPECTRA AND CHROMOSPHERES OF CARBON AND M STARS - CYCLE4 MEDIUM ------------------------------------------------------------------------------------ 2. Scientific Category 3. Proposal For 4. Proposal Type 5. Continuation ID COOL STARS GO Sub Category STELLAR ATMOSPHERES ------------------------------------------------------------------------------------ 6. Principal Investigator Institution Country Telephone Kenneth G. Carpenter NASA GODDARD LASP USA ------------------------------------------------------------------------------------ 7. Abstract We propose to use the Faint Object Spectrograph (FOS) and the Goddard High- Resolution Spectrograph (GHRS) on the HST to obtain ultraviolet spectra of visually bright N-type carbon stars and late M-giant stars. These spectra, obtainable only with HST, will be used with theoretical models to infer the temperature and density structure and the velocity fields of the outer atmosphere in these evolutionarily advanced, non-mira giants. In anticipation of this effort, we have already pushed IUE to its limit to obtain both low-resolution, and, where possible, high-resolution spectra of several M, S, and C stars, and these have been analyzed and published. Based upon the observed line profiles and continua, we will construct semi-empirical non-LTE models in both plane-parallel geometry and spherical geometry, including velocity fields, by attaching a chromosphere to theoretical photospheric models. Two-component models will be studied. Using these and ab-initio hydrodynamic models, we will examine the mechanisms responsible for chromospheric heating and mass loss. A full range of supporting ground-based observations will be undertaken to permit us to connect models of the photospheres, chromospheres, and circumstellar shells. ------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------ 9. Est obs time (hours) pri: 5.00 par: 0 10. Num targs pri: 1 par: 0 ------------------------------------------------------------------------------------ 11. Instruments requested: HRS FOS ------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------ Page 2 I. GENERAL FORM Proposal 5359 PI: Kenneth G. Carpenter Proposal Title: SPECTRA AND CHROMOSPHERES OF CARBON AND M STARS - CYCLE4 MEDIUM ------------------------------------------------------------------------------------ 1. Proposers: Proposers Institution Country ESA ------------------------------------------------------------------------------------ Pi Kenneth G. Carpenter NASA GODDARD LASP USA Hollis R. Johnson INDIANA UNIVERSITY USA David R. Alexander WICHITA STATE UNIVERSITY USA Eugene H. Avrett SMITHSONIAN ASTROPHYSICAL USA OBSERVATORY Alexander Brown U.COLORADO JILA USA Kjell Eriksson UPPSALA ASTRONOMICAL OBSERVATORY SWEDEN X Bengt Gustafsson UPPSALA ASTRONOMICAL OBSERVATORY SWEDEN X Uffe G. Jorgensen NIELS BOHR INSTITUTE DENMARK X Philip D. Judge HIGH ALTITUDE OBSERVATORY USA Jeffrey L. Linsky U.COLORADO JILA USA Donald G. Luttermoser COMPUTER SCIENCES CORPORATION USA Francois Querci OBSERVATOIRE MIDI PYRENEES, FRANCE X TOULOUSE Monique Querci OBSERVATOIRE MIDI PYRENEES, FRANCE X TOULOUSE Richard D. Robinson COMPUTER SCIENCES CORPORATION USA Robert F. Wing OHIO STATE UNIVERSITY USA ------------------------------------------------------------------------------------ 3. Description of proposed observations. The mid-UV spectrum of TW Hor (HD20234) will be surveyed with FOS/G270H and the Mg II region will be observed at R=20000 resolution with GHRS. 30 Her (HD148783) will be observed with the GHRS/G270M with frames centered at 2810, 2345, and 2850 A. The proposed new observations are pure Cycle 4: Primary Hours: Parallel Hours: Exposures: 5.0 0.0 ****** ------------------------------------------------------------------------------------ 4. Justification of need for HST observations. To understand mass loss and to model the outer atmospheres (including chromospheres and circumstellar layers) require detailed profiles of key spectral lines, which in turn requires high-resolution ultraviolet spectra. We have pushed IUE to its limit. That effort has produced low-resolution LWP/LWR spectra of the brighter R stars of all classes, a few brighter N-type stars, and several late M giant stars. High-resolution spectra have been obtained in long exposures for a few bright early-R stars and a few bright M giant stars. A 13-hour high- resolution LWP exposure of the best N-type star (TX Psc) was considerably underexposed and showed clearly only the Mg II emission lines while a few other lines were weakly present (Eriksson et al. 1986). To make further progress, it is absolutely necessary to use HST. ------------------------------------------------------------------------------------ 5. Description of special scheduling requirements. Narrow-band photometry and calibrated spectra will be obtained from the ground at approximately the same time to determine the properties of the underlying photosphere and the CSE. ------------------------------------------------------------------------------------ 6. Description of special calibration exposures. Wavelength calibration exposures on the internal Pt-lamps are requested for each GHRS exposure since we require the highest possible wavelength accuracy in order to measure flow velocities in the chromospheres and circumstellar shells of our target stars. Page 3 ------------------------------------------------------------------------------------ 8. Additional comments or special requests. none Page 4 ------------------------------------------------------------------------------------ 9. Description of previous HST work. a. List HST program numbers and titles, and specify whether they are related to this project or not. HST GTO Programs on which Carpenter is PI: GTO 1195: Outer Atmospheres of Cool Luminous Stars - Cycle 0 (Alpha Ori) 3212: Outer Atmospheres of Cool Luminous Stars - Cycle 1 (Gamma Cru) GTO 1198: Physical Conditions and Velocity Structures in the Red Giant 3934: Winds in the Binaries CI Cyg and EG And - Cycle 2 (2 targets) GTO 1199: Alpha Ori Team Project - Cycle 1 HST GTO programs on which Linsky is PI: GTO 1175/3943: Local Interstellar Medium and D/H Ratio GTO 1176/3964: The dynamics of stellar chromospheres & transition regions GTO 1177: Atmospheres of very inactive K giant stars GTO 1179/3961: Hybrid- chromosphere stars GTO Program 1180: The chromospheres of the very coolest M dwarf stars HST Programs on which Linsky and/or Carpenter are Co-I's: GTO 1210: Age dependence of non-radiative heating in stellar chromospheres GO 2238: Lyman- ALPHA Observations Of High Radial Velocity Stars GO 2321: Search for proton acceleration in flare stars - AU Mic GO 3626: Empirical determination of the wind velocity and density laws for the K supergiant Zeta Aurigae from eclipse ingress spectra HST programs on which Gustafsson is Co-I: GO P3479: Boron in Pop II Dwarfs THERE ARE NO OBSERVATIONS OF CARBON STARS IN THESE GTO PROGRAMS. The only M-giant included in these GTO programs is Gamma Cru, in GTO 3212 - a cycle 1 program which executed late in that cycle. The observations cover a broader range of wavelengths and purposes than those planned for the M-stars in this GO proposal, but they do not include a satisfactory match to the carbon-star observations for our detailed comparison purposes. SAO program 3023 (Alpha Tau) observations have been used to assess the feasibility of programs such as these which involve observations of narrow emission-line sources (see the Ap.J. reference below). b. Summarize the main results obtained from previous related programs. The observations of Alpha Tauri in SAO 3023 provided the first direct measurment of the turbulence in the chromosphere of a cool giant (K5 III), the discovery of a downflow of the C II] chromospheric plasma, the detection of 25 new emission features in the 2320-2370 A region, and the first evidence for optically thin emission lines (of CII 2325A) that have extended wings. Other results are summarized in the papers listed in part (c). Highlights of Carpenter GTO (Programs 1195/3212) and SAO results include: 1) the unambiguous detection of a far-UV continuum in Alpha Ori and Gamma Cru, which will provide a very important and previously unrecognized diagnostic of their chromospheric plasmas (formation temperature in alpha Ori ranges from 3500-5000 K and increases steadily with decreasing wavelength); 2) the discovery of circumstellar CO (4th positive A-X system) absorption bands superposed on the far-UV continuum from Alpha Ori, providing a probe of regions of the circumstellar shell not available at visible or IR wavelengths (initial analysis indicates T=500 K, Vturb=5 km/s, N(CO)=1.0e18 cm-2); 3) detection of myriad new Fe II fluorescent line products, producing by Lyman Alpha radiation in Alpha Ori; 4) a determination that, in Alpha Ori, the resonance lines of OI and CI are very weak due to self-absorption and that the asymmetries seen in the MgII resonance lines are probably due to different velocity shifts between the self-absorption and emission in the two lines; and 5) the first direct measurement of the chromospheric turbulence (24 km/sec) and the detection of a downflow of about 4 km/sec in chromospheric C II] plasma in Alpha Tau. High quality observations of Gamma Cru in program 3212 have recently been acquired and detailed analysis is now in progress. GTO Program 1175: Linsky and collaborators obtained SSA echelle spectra of Capella in the Lyman alpha, FeII, and MgII lines on 15 April 1991. The purpose was to obtain very accurate measurements of the D/H ratio and interstellar properties for the 12.5-pc line of sight towards this star. They derived the ratio D/H = 1.65 (+0.07 -0.18) x 10c{-5}, temperature 7000 (+/- 200) K, and turbulent velocity of 1.66 (+/-0.03) km/s. The local D/H ratio was used to infer the primordial value which is a major constraint on models of the early universe. Observations of Alpha Cen A and B, Procyon, HR 1099, and a reobservation of Capella are planned. GTO Program 1176: Low and moderate dispersion GHRS spectra of Capella were obtained on 15 April 1991 and of Beta Draconis on 23 April 1992. The Capella observations show downflowing transition region gas from both stars in the system and intersystem lines of many different ions that allow the determination of the electron density as a function of the temperature of the emissing plasma. Observations of Procyon, Epsilon Eri, HR 1099, and Alpha Cen A and B are planned. The Beta Draconis data are being analyzed. SV observations of Gamma Draconis obtained on 6 April 1991 by Carpenter et al. provide clear evidence of such high temperature lines as CIV and SIIV in the atmosphere of this hybrid-chromosphere star. The surface fluxes in the 100,000 K plasma lines are the smallest ever observed in any star. GO Program 2321: Evidence for proton beams was obtained by Woodgate et al. from GHRS spectra of AU Mic during a flare. This discovery was described in a recent NASA press release and in an ApJ paper. There have been no observations yet in any of the other programs. c. List publications resulting from the above data (Format: Title, Authors,Journal, Volume, Page, and Year.) Results have been presented: in the Ap.J. & MNRAS, at AAS meeting (1/91, 5/91 & 1/92), the HST Joint Discussion at the IAU General Assembly (7/91), the 7th Cambridge Cool Star Workshop (10/91), and at both HST Workshops (5/91 & 7/92), including two invited reviews (AAS 1/91 and Cool Star Workshop 10/91). "GHRS Observations of Cool, Low-Gravity Stars. I. The Far-UV Spectrum of Alpha Ori (M2 Iab)", Carpenter, K., Robinson, R., Wahlgren, G., Linsky, J., and Brown, A., 1993 Ap.J., submitted. "First Results from the Goddard High Resolution Spectrograph: The Chromosphere of Alpha Tauri", Carpenter, K. G., Robinson, R., Wahlgren, G., Ake, T., Linsky, J., Brown, A., and Walter, F., Ap.J. (Letters), 377, L45, 1991. "Si II Emission Line Diagnostics," Judge, P. G., Carpenter, K. G., and Harper, G.M., MNRAS, 253, 123, 1991. "Early Scientific Results from the Goddard High Resolution Spectrograph" Carpenter, K. G. , Invited Review presented at the AAS Meeting, 1/13-17/91. "GHRS Chromospheric Emission Line Spectra of the Red Giant Alpha Tau" Carpenter, K. G., Robinson, R. D., Ebbets, D. C., Brown, A., and Linsky, J., in `The First Year of HST Observations,' 1991. "Chromospheres and Winds of Cool Stars", Carpenter, K.G., IAU General Assembly Joint Discussion, 'First Results from the Hubble Space Telescope', 7/31/91. "HST Observations of Late-Type Stars," (Invited Review) Carpenter, K. G., in `Proceedings of the 7th Cambridge Workshop on Cool Stars, Stellar Systems, and the Sun,' in press, 1992. "Molecular Absorption in the UV Spectrum of Alpha Ori," Wahlgren, G. M., Robinson, R. D., and Carpenter, K. G., Proceedings of the Seventh Cambridge Workshop on Cool Stars, Stellar Systems and the Sun, ed. M. Giampapa and J. Bookbinder, A.S.P. Conference Series, in press, 1992. "The Chromosphere and Circumstellar Shell of Alpha Orionis as Observed with the Goddard High Resolution Spectrograph," Carpenter, K. G., Robinson, R. D., Wahlgren, G. M., Linsky, J. L., Brown, A., in Science with the Hubble Space Telescope (European Southern Observatory), eds. P. Benvenuti and E. Schreier, in press, 1992. "The Far-UV Spectrum of alpha Ori," Carpenter, K. G., Robinson, R. D., Wahlgren, G. M., Linsky, J.L., and Brown, A., Ap. J., submitted, 1992. `GHRS observations of the local interstellar medium and the deuterium/hydrogen ratio along the line of sight towards Capella,' Linsky, J.L., Brown, A., Gayley, K., Diplas, A., Savage, B. D., Ayres, T. R., Landsman, W., Shore, S., and Heap, S. R., Astrophysical Journal, to appear 10 Jan 1993. `The hydrogen Lyman alpha emission of Capella', Ayres, T.R., Brown, A., Gayley, K.G., and Linsky, J.L., Astrophysical Journal, to appear 10 Jan 1993. `GHRS Far-ultraviolet spectra of coronal and noncoronal stars: Capella and Gamma Draconis', Linsky, J.L., Brown, A., and Carpenter, K.G., in The First Year of HST Observations, ed. A.L. Kinney and J.C. Blades (Baltimore: Space Telescope Science Institute), p. 70 (1991). `The Deuterium abundance in the local interstellar medium', Linsky, J.L.to appear in Highlights of the IAU, Vol. 9. `Ultraviolet observations of stellar coronae: early results from HST', Linsky, J.L., to appear in Memorie della Societa Astronomica Italiana. (plus others) Page 5 ------------------------------------------------------------------------------------ 10. Resources to be supplied by investigator's institution(s). Indiana University (I.U.) has been very generous in providing much time on its computing facilities. Programs, data, and facilities for computing model atmospheres are in use at I.U., Wichita, Copenhagen, Toulouse, and Uppsala. Programs for constructing non-LTE model chromospheres are available at HAO, JILA, Iowa St., GSFC, and Smithsonian. Radio and optical telescopes for concurrent observations are available in Sweden, France, ESO-La Silla, and the United States (Ohio State U.). Software developed by the GHRS IDT will be available at NASA- GSFC, as well as VAX computing facilities, for reduction and measurement of GHRS and FOS spectra. ------------------------------------------------------------------------------------ 11. Address Information Name: KENNETH G. CARPENTER Category: PI Institution: NASA Goddard LASP Address: CODE 681 NASA/GSFC - LAB. FOR ASTRONOMY AND SOLAR PHYSICS City: GREENBELT State: MD Zip Code: 20771 Country: USA Telephone: (301)-286-3453 Telex (or e-mail): 89675 ------------------------------------------------------------------------------------ TARGET LIST a) Fixed Targets ID = 5359 [ 6] ------------------------------------------------------------------------------------------------------------------------------------ 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial |Acqui|FLX| Flux data No | Name | Description | Position |Eqnx | Vel. |Prblm|REF| | | | | | | | | ------------------------------------------------------------------------------------------------------------------------------------ 2 HD20234 TW- A,144 RA=03H12M33.15S+/-1.0", 2000.0 V=+14 1 V=5.74,TYPE=NOC72 HOR DEC=-57D19'17.83"+/-1.0" Comments: (N0; C7,2) CARBON STAR PM(RA) IN SEC-OF -TIME/YR Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) J 2000.00 0.0020 +/- 0.0010 0.0090 +/- 0.0010 0.0000 +/- 0.0000 ------------------------------------------------------------------------------------------------------------------------------------ 3 HD148783 A,144 RA=16H28M38.55S+/-1.0", 2000.0 V=+3 1 V=5.04,TYPE=M6III 30_HER DEC=+41D52'53.74"+/-1.0" Comments: M6 III OXYGEN-RICH STAR PM(RA) IN SEC-OF -TIME/YR Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) J 2000.00 0.0030 +/- 0.0010 -0.0090 +/- 0.0010 0.0000 +/- 0.0000 ------------------------------------------------------------------------------------------------------------------------------------ EXPOSURE LOGSHEET ID = 5359 [ 7] ------------------------------------------------------------------------------------------------------------------------------------ 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |10 | 11 | 12 |13 |14| 15 ------------------------------------------------------------------------------------------------------------------------------------ Line | Seq | Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | S/N |Flx|Pr| Special Number | Name | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| |Rel. Time|Ref| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 HD20234 FOS/RD ACQ/ 4.3 G270H 2750 SCAN-STEP- 1 1.0S 1 CYCLE 4 / 1.0-42.0 PEAK Y=1.204 ONBOARD ACQ FOR SEARCH-SIZE-X=1 1.1 SEARCH-SIZE-Y=3 SEQ 1-2 NO GAP GROUP 1-6 WITHIN 2D Comments: TW HOR IS COMMON NAME OF OBJECT. EXPECT 8500 CTS/TIME INTERVAL. ------------------------------------------------------------------------------------------------------------------------------------ 1.1 HD20234 FOS/RD ACQ/ 1.0 G270H 2750 SCAN-STEP- 1 1.0S 1 ONBOARD ACQ FOR PEAK X=.602 1.2 SCAN-STEP- Y=.602 SEARCH-SIZE-X=6 SEARCH-SIZE-Y=2 ------------------------------------------------------------------------------------------------------------------------------------ 1.2 HD20234 FOS/RD ACQ/ 0.3 G270H 2750 SCAN-STEP- 1 2.0S 1 ONBOARD ACQ FOR 2 PEAK X=.172 SCAN-STEP- Y=.172 SEARCH-SIZE-X=5 SEARCH-SIZE-Y=5 ------------------------------------------------------------------------------------------------------------------------------------ 2 HD20234 FOS/RD ACCUM 4.3 G270H 2750 4 5.0M 1 ------------------------------------------------------------------------------------------------------------------------------------ 3 HD20234 HRS ACQ 2.0 MIRROR-N2 LOCATE=YES 1 40.0S 1 1 ONBOARD ACQ FOR BRIGHT=RETURN 4.000 SEARCH-SIZE=5 SEQ 3 - 6 Comments: USE STEP-TIME = 1.6 SEC. EXPECT ROUGHLY 1400 CTS/1.6S ------------------------------------------------------------------------------------------------------------------------------------ 4 HD20234 HRS ACQ/ 0.25 MIRROR-N2 SEARCH-SIZE=5 1 40S 1 1 ONBOARD ACQ FOR PEAKUP 5.0-6.0 Comments: STEP-TIME = 1.6 SEC EXP TIME ASSUMES 5X5 SEARCH ------------------------------------------------------------------------------------------------------------------------------------ 5 WAVE HRS ACCUM SC2 G270M 2810 STEP-PATT=3 1 30S 1 CALIB FOR 6 NO SLEW SEQ 5-6 NO GAP ------------------------------------------------------------------------------------------------------------------------------------ 6 HD20234 HRS ACCUM 0.25 G270M 2810 STEP-PATT=5 2 20.0M 0 1 FP-SPLIT=STD ------------------------------------------------------------------------------------------------------------------------------------ 33 HD148783 HRS ACQ 2.0 MIRROR-N2 LOCATE=YES 1 25.0S 1 1 ONBOARD ACQ FOR BRIGHT=RETURN 34.000 SEARCH-SIZE=5 SEQ 33 - 35 GROUP 33 - 42 WITHIN 1D Comments: 30 HER IS COMMON NAME FOR HD148783 STEP-TIME = 1.0 SEC. EXPECT 4500 CTS/1.0 SEC ------------------------------------------------------------------------------------------------------------------------------------ EXPOSURE LOGSHEET ID = 5359 [ 8] ------------------------------------------------------------------------------------------------------------------------------------ 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |10 | 11 | 12 |13 |14| 15 ------------------------------------------------------------------------------------------------------------------------------------ Line | Seq | Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | S/N |Flx|Pr| Special Number | Name | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| |Rel. Time|Ref| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 34 HD148783 HRS ACQ/ 0.25 MIRROR-N2 SEARCH-SIZE=5 1 25S 1 1 ONBOARD ACQ FOR PEAKUP 35.0-42.0 Comments: STEP-TIME = 1.0 SEC EXP TIME ASSUMES 5X5 SEARCH ------------------------------------------------------------------------------------------------------------------------------------ 35 WAVE HRS ACCUM SC2 G270M 2810 STEP-PATT=3 1 30S 1 CALIB FOR 36 NO SLEW SEQ 35-36 NO GAP ------------------------------------------------------------------------------------------------------------------------------------ 36 HD148783 HRS ACCUM 0.25 G270M 2810 STEP-PATT=5 1 20.0M 1 FP-SPLIT=STD ------------------------------------------------------------------------------------------------------------------------------------ 37 WAVE HRS ACCUM SC2 G270M 2345 STEP-PATT=3 1 30S 1 CALIB FOR 38 NO SLEW SEQ 37-38 NO GAP ------------------------------------------------------------------------------------------------------------------------------------ 38 HD148783 HRS ACCUM 0.25 G270M 2345 STEP-PATT=5 2 22.0M 10 1 FP-SPLIT=STD ------------------------------------------------------------------------------------------------------------------------------------ 41 WAVE HRS ACCUM SC2 G270M 2850.0 STEP-PATT=3 1 30S 1 CALIB FOR 42 NO SLEW SEQ 41-42 NO GAP ------------------------------------------------------------------------------------------------------------------------------------ 42 HD148783 HRS ACCUM 0.25 G270M 2850.0 STEP-PATT=5 1 20.0M 10 1 FP-SPLIT=STD ------------------------------------------------------------------------------------------------------------------------------------ Summary Form for Proposal 5359 [ 9] Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Configurations FOS/RD HRS ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACQ/PEAK ACCUM ACQ ACQ/PEAKUP ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters SCAN-STEP-Y=1.204 SEARCH-SIZE-X=1 SEARCH-SIZE-Y=3 SCAN-STEP-X=.602 SCAN-STEP-Y=.602 SEARCH-SIZE-X=6 SEARCH-SIZE-Y=2 SCAN-STEP-X=.172 SCAN-STEP-Y=.172 SEARCH-SIZE-X=5 SEARCH-SIZE-Y=5 LOCATE=YES BRIGHT=RETURN SEARCH-SIZE=5 STEP-PATT=3 STEP-PATT=5 FP-SPLIT=STD ------------------------------------------------------------------------------------------------------------------------------------ Proposal for GO ------------------------------------------------------------------------------------------------------------------------------------ S/C Hours 5.00 ------------------------------------------------------------------------------------------------------------------------------------ Scientific Category COOL STARS ------------------------------------------------------------------------------------------------------------------------------------ Scientific Sub-category STELLAR ATMOSPHERES ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements CYCLE 4 / 1.0-42.0; ONBOARD ACQ FOR 1.1; SEQ 1-2 NO GAP; GROUP 1-6 WITHIN 2D ONBOARD ACQ FOR 1.2 ONBOARD ACQ FOR 2 ONBOARD ACQ FOR 4.000; SEQ 3 - 6 ONBOARD ACQ FOR 5.0-6.0 CALIB FOR 6 NO SLEW; SEQ 5-6 NO GAP ONBOARD ACQ FOR 34.000; SEQ 33 - 35; GROUP 33 - 42 WITHIN 1D ONBOARD ACQ FOR 35.0-42.0 CALIB FOR 36 NO SLEW; SEQ 35-36 NO GAP CALIB FOR 38 NO SLEW; SEQ 37-38 NO GAP CALIB FOR 42 NO SLEW; SEQ 41-42 NO GAP ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements G270H MIRROR-N2 G270M ------------------------------------------------------------------------------------------------------------------------------------ Target Names HD20234 TW-HOR HD148783 30_HER ------------------------------------------------------------------------------------------------------------------------------------