9083( 4) - 12/17/01 06:21 - [ 1] PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only ID: 9083 Version: 4 Check-in Date: 17-Dec-2001 06:19:55 1.Proposal Title: Critical spectroscopic variations in Eta Carinae ------------------------------------------------------------------------------------ 2. Proposal For 3. Cycle GO 10 ------------------------------------------------------------------------------------ 4. Investigators Contact? PI: Kris Davidson University of Minnesota - Twin Cities CoI: Dr. Theodore Gull Goddard Space Flight Center N CoI: Dr. Sveneric Johansson University of Lund N CoI: Dr. D. John Hillier University of Pittsburgh N CoI: Dr. Kazunori Ishibashi Goddard Space Flight Center N CoI: Dr. Roberta Humphreys University of Minnesota N CoI: Dr. Nolan Walborn Space Telescope Science Institute N CoI: Dr. Augusto Damineli University of Sao Paulo N CoI: Dr. Fred Hamann University of Florida N CoI: Dr. Otmar Stahl Landessternwarte Heidelberg N CoI: Nathan Smith University of Minnesota N ------------------------------------------------------------------------------------ 5. Abstract The very massive, unstable, persistently enigmatic star Eta Carinae has implications for several branches of astrophysics. Despite a series of remarkable discoveries in previous HST data, the nature of the central object remains elusive. Fortunately, recent developments offer, for the first time, an approach that can settle a number of long-standing questions which have been obstacles to understanding this unique object. A 5.5-year spectroscopic and X-ray cycle is now well established. STIS provides the most promising and very likely the only way to test whether Eta Car is a 5.5-year binary system. If it is, STIS gives by far the best constraints on the companion star, orbit, etc., needed to assess mechanisms for past outbursts and ejecta. If binary models don't work, then the 5.5-yr effect is probably a thermal cycle which gives novel information about the star's structure. In addition to the periodicity, the unprecedented brightening found with STIS in 1999 has continued at a diminished rate and merits followup observations. We sense that these recently discovered effects offer a likely breakthrough if Eta Car can be observed repeatedly with STIS through the current 5.5-year period, 1998.0--2003.5. During HST Cycle 10 the pace is expected to increase as this object enters the phase preceding its next major ``event.'' ------------------------------------------------------------------------------------ 9083( 4) - 12/17/01 06:21 - [ 2] Observations Description ------------------------ The current spectroscopic cycle of Eta Car began with its previous ``event'' about 1997.9 and will continue to the next one about 2003.5. We have minimal STIS data for 1998.0 and 1998.9, and good data for 1998.2, 1999.1, and 2000.2. Shorter intervals will be highly desirable after 2002.0 as the rate of change is expected to increase. This is especially true for the orbital-velocity question. Some of the motivations and considerations of our present plan first became evident when the 1998--99 STIS data were reduced. HST Cycles 10 and 11 are important because they represent a phase in the 5.5-year period leading up to the next major spectroscopic event, reliably predicted to occur near 2003.5. This proposal is mainly a request for Cycle 10 HST time. However, we frankly fear the possibility of HST schedule slippage, which, in a worst-case scenario, could prevent normal allocation of the orbits needed for late 2002 and early 2003, the most critical time. Therefore we also request Cycle 11 orbits, simply to avoid the danger that schedule slippage or similar factors might cause none to be allocated then -- which would be a scientific disaster, because the observations planned for 2002--2003 would have to wait until 2008-2010, at the end of the planned HST activities. No suitable instrument is likely to be available after the demise of STIS. We have submitted a heritage proposal for additional orbits in Cycle 11 through 13 to carry across the minimum. In Cy 9 we requested and were allocated 5 orbits. A somewhat larger number is merited in Cy 10, for two reasons: (1) It is now prudent to switch to a slit orientation range that will also be suitable near the time of the event in mid- 2003. (This depends on the time of the year.) However, with the new slit orientation we must observe some of the nearby variable ejecta (0.2" away) with a separate slit position, at some wavelengths. This does not double the required time, but nearly so. (2) Since the pace of Eta Car's spectroscopic variation is expected to increase in 2002, we hope to observe it on two different occasions in Cycle 10. One or more of these visits can have less complete wavelength coverage than the other. STIS/CCD, 1700--10000 Angstrom with `M' gratings and 0.1" slit: We know from experience how many orbits are required for a good set of observations of this target; in fact we have developed techiques to make the process unusually efficient. In a single orbit we can cover only 3 to 6 wavelength intervals with the medium resolution gratings. Eta Car has hundreds of useful spectral features across the whole CCD wavelength range; a wide sample of these is needed for modeling. The star's behavior is still so unpredictable that critical effects can happen in almost any of the STIS grating-tilt wavelength samples. With 3 CVZ orbits, complete STIS/CCD coverage is possible, with full wavelength calibrations, etc. Therefore we request 5 orbits for STIS/CCD in Cycle 10, with the following plan in mind. Three orbits give the full CCD spectral coverage, and two one orbit visits provide snapshot views. We add two CVZ orbits for a single visit to obtain STIS/MAMA/FUV, 1250--1700 Angstrom with echelle E140M and STIS/MAMA/NUV with echelle E230M centered at 1978A. We choose the echelles both because of its high spectral resolution, and because it covers almost the most of the UV range in one visit. Because of bright-object limits, while we have established that Eta Carinae does not exceed such for the longwave E230M setting, we find that spectral region more variable, including the Fe II 2507, 9 emission lines in the Weiglet blobs within 0.2" distance. So far only one observation of this type has been obtained, in March 2000; another is merited in Cycle 10. In summary, we request 5 orbits for STIS/CCD observations plus 2 orbits for STIS/FUV and NUV in Cycle 10, plus 7 ``precautionary'' orbits in Cycle 11. CVZ time is necessary to accomplish the full coverage and monitoring of Eta Carinae. Real Time Justification ----------------------- We had intended to observe Eta Carinae in March 2002 when the ORIENT angle duplicates the same angle as used on three different occasions. We have been monitoring the central source (A) and Weigelt blobs B and D. However the servicing mission 3B and RPS2 visibilities have conspired to push this opportunity out. Visits one and two are therefore moved to January 2002 with the intent of full coverage of Eta Carinae from 1180A to 10000A in about the same time frame as a planned FUSE observation. Visit three is a single orbit visit done on October 1, 2001. We expected a 20% decline in flux, but the fluxes actually increased in the CCD acquisition image by that amount over April 2001. This led to replanning of visits 1 and 2 with exposure times adjusted downward to predicted DN~16000 to 18000 for most grating settings with the exceptions of the most uv settings for G230MB. Visit four is a duplicate of visit 3 for fall 2002 with adjusted exposure times. Calibration Justification ------------------------- Additional Comments ------------------- Visit 1 and 2 are to be coordinated in the same CVZ opportunity in early 2002 for monitoring purposes and to get a complete wavelength coverage from 1150A to 10100A. Visit 3 is to occur between September and December 2001 for monitoring purposes. Visit 4 is to obtain a complete spectrum of Weigelt C for the first time. ------------------------------------------------------------------------------------ 9083( 4) - 12/17/01 06:21 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 ETA-CAR-A STAR, ETA CARINAE STAR RA=10H 45M 3.62S +/- .3", DEC=- J2000 V = 8.0+/-0.5 59D 41' 4.1" +/- .3", PLATE- B = 9.0+/-0.5 ID=ZZZQ F(2000)=0.7+/-0.3e-12 F(4000)=1.2+/-0.4e-12 F(6000)=2.3+/-0.6e-12 F(9500)=4.4+/-1.2e-12 Coordinate Source: IMAGE_TIED_TO_GSC_FRAME Comments: Special catalog ZZZQ is needed because GSC is v poor in this field. 9083( 4) - 12/17/01 06:21 - [ 4] Visit: 01 Visit Priority: Visit Requirements: CVZ BETWEEN 26-Nov-2001 AND 25-Mar-2002 On Hold Comments: Additional Comments: Use special catalog ZZZQ for acq. Schedule in same CVZ opportunity as Visit 2. Exposure times and fluxes have been pulled in from FUSE observations in July 2001 and from Visit 3 of this proposal done 1 October 2001. All are within the MAMA range and should not lead to local or global limits. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 10 ETA-CAR-A STIS/C ACQ F25ND3 MIRROR ACQTYPE=POINT 1 0.5 S CD Comments: October 1 2001 ACQ Peak DN was 5615 in 0.5 sec, 56000c/s in a 5x5 pixel square for 9083 visit 1 ACQ PEAK DN was 4344 in 0.5 sec, 55000 c/s in a 5x5 pixel square for 9242 six hours later. ------------------------------------------------------------------------------------------------------------------------------------ 20 ETA-CAR-A STIS/C ACQ/PEA 52X0.1 G750M 7795 1 0.5 S CD K ------------------------------------------------------------------------------------------------------------------------------------ 21 ETA-CAR-A STIS/C ACCUM 52X0.1 G750M 6768 CR-SPLIT=2,GAIN=4,SIZEAXIS2=400 1 0.4 S CD Comments: Monitor of Balmer alpha with each visit Expect 21000 DN on each subframe. ------------------------------------------------------------------------------------------------------------------------------------ 30 ETA-CAR-A STIS/F ACCUM 0.2X0.2 E140M 1425 1 2500 S UV-MAM A Comments: Predicted count rates are: 0.5 c/s peak local count rate and 4600 c/s global ------------------------------------------------------------------------------------------------------------------------------------ 50 ETA-CAR-A STIS/F ACCUM 0.2X0.2 E140M 1425 1 2200 S UV-MAM A Comments: Expect roughly 0.5 ct/s peak local count rate and ~5000c/s global rate ------------------------------------------------------------------------------------------------------------------------------------ 70 ETA-CAR-A STIS/N ACCUM 0.2X0.2 E230M 1978 1 4000 S UV-MAM A Comments: Predicted count rate; 0.25 c/s peak local count rate and 4600 c/s global. ------------------------------------------------------------------------------------------------------------------------------------ 80 ETA-CAR-A STIS/N ACCUM 0.2X0.0 E230H 3012 1 2650 S UV-MAM 9 A Comments: Added in response to results from 9242. Ted Gull is contact for both this proposal and 9242 and PI's are in agreement. ------------------------------------------------------------------------------------------------------------------------------------ 9083( 4) - 12/17/01 06:21 - [ 5] Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 90 ETA-CAR-A STIS/N ACCUM 0.2X0.0 E230H 3012 1 2650 S UV-MAM 9 A Comments: Added in response to results from proposal 9242 October 1. Ted Gull is contact for both this proposal and 9242. Both PI's are in agreement. ------------------------------------------------------------------------------------------------------------------------------------ 9083( 4) - 12/17/01 06:21 - [ 6] Visit: 02 Visit Priority: Visit Requirements: CVZ BETWEEN 01-Jan-2002 AND 01-Feb-2002 GROUP 01, 02 WITHIN 10 D On Hold Comments: Additional Comments: This visit had been modified to accomodate the impact of SM3B and loss of visibility in March 2002 CVZ. It is now moved to January 2002 along with visit 1. A FUSE observations will occur in the same timeframe so we should finally get a full spectral coverage from 912A to 10000A within a month. Exposure times have been adjusted based upon visit 3 which was a single CVZ monitoring orbit executed on 1 October 2001. We found a 20 percent increase in fluxes especially in the red. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 10 ETA-CAR-A STIS/C ACQ F25ND3 MIRROR ACQTYPE=POINT 1 0.5 S CD Comments: From October 1, 2001 within a 5x5 pixel square, the count rate will be 55000c/s. Peak DN about 5500. ------------------------------------------------------------------------------------------------------------------------------------ 20 ETA-CAR-A STIS/C ACQ/PEA 52X0.1 G750M 7795 1 0.5 S CD K Comments: This wavelength interval has no bright emission lines, unusual in spectrum of EtaCar. Expected to give roughly 400-1000c/s per lambda-pixel, uncertain by factor of maybe 2. ------------------------------------------------------------------------------------------------------------------------------------ 30 ETA-CAR-A STIS/C ACCUM 52X0.1 G750M 6768 SIZEAXIS2=400,CR-SPLIT=2,GAIN=1 1 6 S MAX DUR CD Comments: GAIN=1 should have max DN SAT ------------------------------------------------------------------------------------------------------------------------------------ 40 ETA-CAR-A STIS/C ACCUM 52X0.1 G750M 6768 SIZEAXIS2=400,CR-SPLIT=2,GAIN=4 1 0.4 S MAX DUR CD Comments: GAIN=4 should have max DN 20000 for each cr-split frame. ------------------------------------------------------------------------------------------------------------------------------------ 50 ETA-CAR-A STIS/C ACCUM 52X0.1 G430M 4194 GAIN=1,SIZEAXIS2=400,CR-SPLIT=2 1 18 S CD Comments: GAIN=1 CR-SPLIT=2 max DN 16500 ------------------------------------------------------------------------------------------------------------------------------------ 60 ETA-CAR-A STIS/C ACCUM 52X0.1 G230MB 2836 GAIN=1,SIZEAXIS2=400,CR-SPLIT=2 1 5 M CD Comments: GAIN=1 CR-SPLIT=2 max DN 18400 ------------------------------------------------------------------------------------------------------------------------------------ 70 ETA-CAR-A STIS/C ACCUM 52X0.1 G430M 4706 GAIN=1,SIZEAXIS2=400,CR-SPLIT=2 1 30 S CD Comments: GAIN=1 CR-SPLIT=2 max DN 15000 ------------------------------------------------------------------------------------------------------------------------------------ 9083( 4) - 12/17/01 06:21 - [ 7] Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 80 ETA-CAR-A STIS/C ACCUM 52X0.1 G750M 9336 GAIN=1,SIZEAXIS2=400,CR-SPLIT=2 1 7 S CD Comments: GAIN=1 CR-SPLIT=2 max DN 16000; Critical wavelength interval. Changed to shorter exposure, gain=1 to minimize video pickup. ------------------------------------------------------------------------------------------------------------------------------------ 90 ETA-CAR-A STIS/C ACCUM 52X0.1 G750M 8311 GAIN=1,SIZEAXIS2=400,CR-SPLIT=2 1 9 S CD Comments: GAIN=1 CR-SPLIT=2 max DN 16200 ------------------------------------------------------------------------------------------------------------------------------------ 100 ETA-CAR-A STIS/C ACCUM 52X0.1 G230MB 1854 GAIN=1,SIZEAXIS2=400,CR-SPLIT=4 1 800 S CD Comments: GAIN=1 CR-SPLIT=4 max DN 1200 ------------------------------------------------------------------------------------------------------------------------------------ 110 ETA-CAR-A STIS/C ACCUM 52X0.1 G750M 5734 GAIN=1,SIZEAXIS2=400,CR-SPLIT=2 1 6 S CD Comments: GAIN=1 CR-SPLIT=2 max DN 16200 ------------------------------------------------------------------------------------------------------------------------------------ 120 ETA-CAR-A STIS/C ACCUM 52X0.1 G230MB 2557 GAIN=1,SIZEAXIS2=400,CR-SPLIT=4 1 1200 S CD Comments: GAIN=1 CR-SPLIT=4 max DN 12800; Includes important 2507A emission. ------------------------------------------------------------------------------------------------------------------------------------ 130 ETA-CAR-A STIS/C ACCUM 52X0.1 G430M 3680 GAIN=1,SIZEAXIS2=400,CR-SPLIT=2 1 52 S CD Comments: GAIN=1 CR-SPLIT=2 max DN 15600 ------------------------------------------------------------------------------------------------------------------------------------ 140 ETA-CAR-A STIS/C ACCUM 52X0.1 G230MB 2697 GAIN=1,SIZEAXIS2=400,CR-SPLIT=2 1 280 S CD Comments: GAIN=1 CR-SPLIT=2 max DN 8600 ------------------------------------------------------------------------------------------------------------------------------------ 150 ETA-CAR-A STIS/C ACCUM 52X0.1 G430M 3423 GAIN=1,SIZEAXIS2=400,CR-SPLIT=2 1 90 S CD Comments: GAIN=1 CR-SPLIT=2 max DN 13400 ------------------------------------------------------------------------------------------------------------------------------------ 160 ETA-CAR-A STIS/C ACCUM 52X0.1 G430M 5216 GAIN=1,SIZEAXIS2=400,CR-SPLIT=2 1 16 S CD Comments: GAIN=1 CR-SPLIT=2 max DN 15600 ------------------------------------------------------------------------------------------------------------------------------------ 170 ETA-CAR-A STIS/C ACCUM 52X0.1 G230MB 1713 SIZEAXIS2=400,GAIN=1,CR-SPLIT=4 1 800 S CD Comments: GAIN=1 CR-SPLIT=4 DN=1000 ------------------------------------------------------------------------------------------------------------------------------------ 180 ETA-CAR-A STIS/C ACCUM 52X0.1 G750M 7283 GAIN=1,SIZEAXIS2=400,CR-SPLIT=2 1 4 S CD Comments: GAIN=1 CR-SPLIT=2 max DN 17600 ------------------------------------------------------------------------------------------------------------------------------------ 190 ETA-CAR-A STIS/C ACCUM 52X0.1 G750M 7795 GAIN=1,SIZEAXIS2=400,CR-SPLIT=2 1 8 S CD Comments: GAIN=1 CR-SPLIT=2 max DN 15900 ------------------------------------------------------------------------------------------------------------------------------------ 9083( 4) - 12/17/01 06:21 - [ 8] Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 200 ETA-CAR-A STIS/C ACCUM 52X0.1 G230MB 1995 GAIN=1,SIZEAXIS2=400,CR-SPLIT=3 1 600 S CD Comments: GAIN=1 CR-SPLIT=3 max DN 915 ------------------------------------------------------------------------------------------------------------------------------------ 210 ETA-CAR-A STIS/C ACCUM 52X0.1 G750M 6768 CR-SPLIT=2,GAIN=4,SIZEAXIS2=400 1 .4 S MAX DUR CD Comments: GAIN=4 CR-SPLIT=NO max DN 21000; check on pointing ------------------------------------------------------------------------------------------------------------------------------------ 220 ETA-CAR-A STIS/C ACCUM 52X0.1 G750M 6768 GAIN=1,SIZEAXIS2=400,CR-SPLIT=2 1 6 S MAX DUR CD Comments: Halpha will be saturated, but He I 6678 will not. ------------------------------------------------------------------------------------------------------------------------------------ 230 ETA-CAR-A STIS/C ACCUM 52X0.1 G750M 6252 GAIN=1,SIZEAXIS2=400,CR-SPLIT=2 1 8 S CD Comments: GAIN=1 CR-SPLIT=2 max DN 16000 ------------------------------------------------------------------------------------------------------------------------------------ 240 ETA-CAR-A STIS/C ACCUM 52X0.1 G230MB 2135 GAIN=1,SIZEAXIS2=400,CR-SPLIT=3 1 600 S CD Comments: GAIN=1 CR-SPLIT=3 max DN 1265 ------------------------------------------------------------------------------------------------------------------------------------ 250 ETA-CAR-A STIS/C ACCUM 52X0.1 G430M 4451 GAIN=1,SIZEAXIS2=400,CR-SPLIT=3 1 18 S CD Comments: GAIN=1 CR-SPLIT=3 max DN 18000; Includes bright H-gamma, changed to gain=4, CR=SPLIT=3 as saturated in Feb 99 and Mar 00 visits. (TRG) ------------------------------------------------------------------------------------------------------------------------------------ 260 ETA-CAR-A STIS/C ACCUM 52X0.1 G430M 3936 GAIN=1,SIZEAXIS2=400,CR-SPLIT=2 1 26 S CD Comments: GAIN=1 CR-SPLIT=2 max DN 16000 ------------------------------------------------------------------------------------------------------------------------------------ 270 ETA-CAR-A STIS/C ACCUM 52X0.1 G230MB 3115 GAIN=1,SIZEAXIS2=400,CR-SPLIT=2 1 300 S CD Comments: GAIN=1 CR-SPLIT=2 max DN 14900 ------------------------------------------------------------------------------------------------------------------------------------ 280 ETA-CAR-A STIS/C ACCUM 52X0.1 G750M 9851 GAIN=1,SIZEAXIS2=400,CR-SPLIT=2 1 15 S CD Comments: GAIN=1 CR-SPLIT=2 max DN 16900 ------------------------------------------------------------------------------------------------------------------------------------ 290 ETA-CAR-A STIS/C ACCUM 52X0.1 G430M 3165 GAIN=1,SIZEAXIS2=400,CR-SPLIT=2 1 90 S CD Comments: GAIN=1 CR-SPLIT=2 max DN 15800 ------------------------------------------------------------------------------------------------------------------------------------ 300 ETA-CAR-A STIS/C ACCUM 52X0.1 G430M 5471 GAIN=1,SIZEAXIS2=400,CR-SPLIT=2 1 34 S CD Comments: GAIN=1 CR-SPLIT=2 max DN 16000 ------------------------------------------------------------------------------------------------------------------------------------ 310 ETA-CAR-A STIS/C ACCUM 52X0.1 G230MB 2976 GAIN=1,SIZEAXIS2=400,CR-SPLIT=2 1 340 S CD Comments: GAIN=1 CR-SPLIT=2 max DN 16000 ------------------------------------------------------------------------------------------------------------------------------------ 9083( 4) - 12/17/01 06:21 - [ 9] Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 320 ETA-CAR-A STIS/C ACCUM 52X0.1 G430M 4961 GAIN=4,SIZEAXIS2=400,CR-SPLIT=2 1 8 S CD Comments: GAIN=4 CR-SPLIT=2 max DN 15000 ------------------------------------------------------------------------------------------------------------------------------------ 330 ETA-CAR-A STIS/C ACCUM 52X0.1 G430M 4961 CR-SPLIT=2,GAIN=1,SIZEAXIS2=400 1 36 S MAX DUR CD Comments: GAIN=1 CR-SPLIT=2 max DN 7X SAT ------------------------------------------------------------------------------------------------------------------------------------ 340 ETA-CAR-A STIS/C ACCUM 52X0.1 G750M 8825 GAIN=1,SIZEAXIS2=400,CR-SPLIT=2 1 6 S CD Comments: GAIN=1 CR-SPLIT=2 max DN 15000 ------------------------------------------------------------------------------------------------------------------------------------ 350 ETA-CAR-A STIS/C ACCUM 52X0.1 G230MB 2276 GAIN=1,SIZEAXIS2=400,CR-SPLIT=3 1 600 S CD Comments: GAIN=1 CR-SPLIT=3 max DN 2500 ------------------------------------------------------------------------------------------------------------------------------------ 360 ETA-CAR-A STIS/C ACCUM 52X0.1 G230MB 2416 GAIN=1,SIZEAXIS2=400,CR-SPLIT=2 1 320 S CD Comments: GAIN=1 CR-SPLIT=2 max DN 5000 ------------------------------------------------------------------------------------------------------------------------------------ 9083( 4) - 12/17/01 06:21 - [ 10] Visit: 03 Visit Priority: Visit Requirements: CVZ BETWEEN 01-Sep-2001 AND 01-Jan-2002 On Hold Comments: Additional Comments: Use Mar 19, 1998 observation prop 7302 (Davidson) acquisition and the February 22, 1999 visit 2 prop 8036 (Gull) acquisition setups. Use special catalog ZZZQ for acq. Special time requirement is due to ORIENT angle and desire to repeat Mar 19, 1998 and February 22 1999 observations. Eta Carina is near spectroscopic maximum and only increased 15% between Feb 99 and Mar 00. This visit is for measuring the width of the Sr filament and getting full spectral coverage from ~3300A to 10140A. February 2001 adjustments: Gain adjustments for 6768 short exposures on Eta Car A ORIENT tightened to accommodate science. Desired ORIENT is ~90 deg. 85D to 105D positions it to the June 2001 windows. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 10 ETA-CAR-A STIS/C ACQ F25ND3 MIRROR ACQTYPE=POINT 1 0.5 S CD Comments: Expected to give roughly 3750 cts in peak pixel in 0.5s, give or take factor of 2 or 3. March 2000 results was 2220 cts in one pixels and Eta Carinae is near spectroscopic maximum ------------------------------------------------------------------------------------------------------------------------------------ 20 ETA-CAR-A STIS/C ACQ/PEA 52X0.1 G750M 7795 1 0.5 S CD K Comments: This wavelength interval has no bright emission lines, unusual in spectrum of EtaCar. Expected to give roughly 400-1000 cts/s per lambda-pixel, uncertain by factor of maybe 2. ------------------------------------------------------------------------------------------------------------------------------------ 30 ETA-CAR-A STIS/C ACCUM 52X0.1 G750M 6768 SIZEAXIS2=400,CR-SPLIT=2,GAIN=1 1 6 S MAX DUR CD Comments: GAIN=1 should have max DN SAT ------------------------------------------------------------------------------------------------------------------------------------ 40 ETA-CAR-A STIS/C ACCUM 52X0.1 G750M 6768 SIZEAXIS2=400,CR-SPLIT=NO,GAIN=4 1 0.6 S MAX DUR CD Comments: GAIN=4 should have max DN 15400 for each cr-split frame. ------------------------------------------------------------------------------------------------------------------------------------ 50 ETA-CAR-A STIS/C ACCUM 52X0.1 G750M 9336 SIZEAXIS2=400,CR-SPLIT=2,GAIN=1 1 36 S CD ------------------------------------------------------------------------------------------------------------------------------------ 60 ETA-CAR-A STIS/C ACCUM 52X0.1 G430M 3936 CR-SPLIT=2,SIZEAXIS2=400,GAIN=4 1 120 S CD ------------------------------------------------------------------------------------------------------------------------------------ 70 ETA-CAR-A STIS/C ACCUM 52X0.1 G430M 3936 GAIN=1,SIZEAXIS2=400 1 72 S CD Comments: GAIN=1 CR-SPLIT=2 ------------------------------------------------------------------------------------------------------------------------------------ 9083( 4) - 12/17/01 06:21 - [ 11] Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 80 ETA-CAR-A STIS/C ACCUM 52X0.1 G430M 4194 GAIN=1,SIZEAXIS2=400 1 36 S CD Comments: GAIN=1 CR-SPLIT=2 ) ------------------------------------------------------------------------------------------------------------------------------------ 90 ETA-CAR-A STIS/C ACCUM 52X0.1 G750M 9851 GAIN=1,SIZEAXIS2=400 1 12 S CD Comments: GAIN=1 CR-SPLIT=2 ------------------------------------------------------------------------------------------------------------------------------------ 100 ETA-CAR-A STIS/C ACCUM 52X0.1 G750M 7283 CR-SPLIT=2,GAIN=4,SIZEAXIS2=400 1 240 S CD ------------------------------------------------------------------------------------------------------------------------------------ 110 ETA-CAR-A STIS/C ACCUM 52X0.1 G750M 7283 GAIN=1,SIZEAXIS2=400 1 10 S CD Comments: GAIN=1 CR-SPLIT=2 ------------------------------------------------------------------------------------------------------------------------------------ 120 ETA-CAR-A STIS/C ACCUM 52X0.1 G430M 4451 CR-SPLIT=2,SIZEAXIS2=400 1 36 S CD ------------------------------------------------------------------------------------------------------------------------------------ 130 ETA-CAR-A STIS/C ACCUM 52X0.1 G750M 5734 GAIN=1,SIZEAXIS2=400 1 15 S CD Comments: GAIN=1 CR-SPLIT=2 ------------------------------------------------------------------------------------------------------------------------------------ 140 ETA-CAR-A STIS/C ACCUM 52X0.2 G430M 5216 GAIN=1,SIZEAXIS2=400 1 36 S CD Comments: GAIN=1 CR-SPLIT=2 ------------------------------------------------------------------------------------------------------------------------------------ 150 ETA-CAR-A STIS/C ACCUM 52X0.1 G230LB 2375 GAIN=1,SIZEAXIS2=400 1 60 S MAX DUR CD Comments: GAIN=1 CR-SPLIT=2 ------------------------------------------------------------------------------------------------------------------------------------ 160 ETA-CAR-A STIS/C ACCUM 52X0.1 G430M 4961 GAIN=1,SIZEAXIS2=400 1 36 S CD Comments: GAIN=1 CR-SPLIT=2 ------------------------------------------------------------------------------------------------------------------------------------ 170 ETA-CAR-A STIS/C ACCUM 52X0.1 G430M 4961 GAIN=1,SIZEAXIS2=400 1 3 S CD Comments: GAIN=1 CR-SPLIT=2 ------------------------------------------------------------------------------------------------------------------------------------ 9083( 4) - 12/17/01 06:21 - [ 12] Summary Form for Proposal 9083 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures F25ND3 52X0.1 0.2X0.2 0.2X0.09 52X0.2 ------------------------------------------------------------------------------------------------------------------------------------ Configurations STIS/CCD STIS/FUV-MAMA STIS/NUV-MAMA ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACQ ACQ/PEAK ACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters ACQTYPE=POINT SIZEAXIS2=400 GAIN=1 GAIN=4 CR-SPLIT=2 CR-SPLIT=4 CR-SPLIT=3 CR-SPLIT=NO ------------------------------------------------------------------------------------------------------------------------------------ Proposal Category GO ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements CVZ BETWEEN 26-Nov-2001 AND 25-Mar-2002 CVZ BETWEEN 01-Jan-2002 AND 01-Feb-2002 GROUP 01, 02 WITHIN 10 D MAX DUR CVZ BETWEEN 01-Sep-2001 AND 01-Jan-2002 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements MIRROR G750M E140M E230M E230H G430M G230MB G230LB ------------------------------------------------------------------------------------------------------------------------------------ Target Names ETA-CAR-A ------------------------------------------------------------------------------------------------------------------------------------ Wavelengths 7795 6768 1425 1978 3012 4194 2836 4706 9336 8311 1854 5734 2557 3680 2697 3423 5216 1713 7283 1995 6252 2135 4451 3936 3115 9851 3165 5471 2976 4961 8825 2276 2416 2375 ------------------------------------------------------------------------------------------------------------------------------------