Page 1 PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only ID 5482 Report Date: 18-Jul-95:17:30 Version: ********** Check-in Date: ********** 1.Proposal Title: HIGH RESOLUTION IMAGERY OF THE RECURRENT NOVA T PYX'S NEXT ERUPTION CYCLE4MEDIUM ------------------------------------------------------------------------------------ 2. Scientific Category 3. Proposal For 4. Proposal Type 5. Continuation ID INTERSTELLAR MEDIUM GO 3 Long Term yrs Sub Category Target of Oppt. NOVAE ------------------------------------------------------------------------------------ 6. Principal Investigator Institution Country Telephone Michael M Shara SPACE TELESCOPE SCIENCE INST USA 410-338-4700 ------------------------------------------------------------------------------------ 7. Abstract The recurrent nova T Pyxidis displays at least three concentric shells from its most recent eruptions (1920, 1944, and 1966). It is one of only a dozen novae with known shells, and the only recurrent nova with clearly resolved circumstellar matter. A unique and once-only opportunity will exist during T Pyxidis' next eruption (now overdue) to determine 1) The uniformity and isotropy of material (both dust and different chemical elements) ejected in previous eruptions, and 2) The smallest structures formed in nova eruptions. The Planetary Camera will be used to obtain narrowband Hydrogen, Helium, Nitrogen and Oxygen images, as well as broadband images. These will be used to search for fluorescence and reflection light echoes from, and small-scale structure in the nova circumstellar gas and dust ejecta. We note that this proposal was granted HST time during cycle 1. The time was rescinded after the spherical aberration problem was discovered. The refurbished HST and WFPCII will be able to carry out all the scientific goals of the original proposal. ------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------ 9. Est obs time (hours) pri: 22.00 par: 0 10. Num targs pri: 1 par: 0 ------------------------------------------------------------------------------------ 11. Instruments requested: WF/PC ------------------------------------------------------------------------------------ 12. Special sched req: Time Critical obs. ------------------------------------------------------------------------------------ Page 2 I. GENERAL FORM Proposal 5482 PI: Michael M Shara Proposal Title: HIGH RESOLUTION IMAGERY OF THE RECURRENT NOVA T PYX'S NEXT ERUPTION CYCLE4MEDIUM ------------------------------------------------------------------------------------ 1. Proposers: Proposers Institution Country ESA ------------------------------------------------------------------------------------ Robert Williams SPACE TELESCOPE SCIENCE USA INSTITUTE Dina Prialnik TEL-AVIV UNIVERSITY ISRAEL ------------------------------------------------------------------------------------ 3. Description of proposed observations. We propose to use the Planetary Camera CCD to image the nova shell in the brightest emission lines seen its spectra (Williams, ApJ 261, 170 (1982)) before, during and after eruption. Narrowband filters at Halpha, HeII, [NII], [OII] and [OIII], as well as reference images in B and R will be taken as soon as possible after HST refurbishment (hopefully before the next eruption and then about 4, 10, 20, 40, 100, 200, and 600 days after eruption. The light sphere from the nova flash expands at the rate of 1"/week at the distance of T Pyx (1 kpc). (This dictates the timescale of the first 4 proposed visits). We will search for successively more distant dust and gas from previous eruptions to determine how much previous debris has now become too faint to see, and the smallest visible structures in older ejecta. We will also search for systematic chemical and/or ionization structures in the previous eruptions ejecta as the expanding nova flash lights it up. In summary, we expect to be able to resolve spatial and chemical structures in the ejecta of a nova only a few nova photospheric radii in size (10 ** 15 cm). We will also see light echoes and fluorescence from the dust and gas, respectively, ejected in the last two or three eruptions. ------------------------------------------------------------------------------------ 4. Justification of need for HST observations. The high spatial resolution of HST is essential to reolve the smallest ejecta features. ------------------------------------------------------------------------------------ 5. Description of special scheduling requirements. Narrowband filters at Halpha, HeII, [NII], [OII] and [OIII], as well as reference images in B and R will be taken as soon as possible after HST refurbishment (hopefully before the next eruption 200, and 600 days after eruption. (This proposal is thus, of necessity, a (rather urgent) GO cycle 4 proposal, a target-of-opportunity proposal, and a long-term proposal.) As ejected material expands away from the explosion at roughly 2 * 10 **8 cm/s, the newly formed shell should begin to be resolvable (0.1-0.2 arcsec) in 5 * 10**6 seconds, i.e. 2 months. After 2 years groundbased imagery will be able to resolve the inner shell and follow subsequent evolution and expansion of the ejected gas. This dictates the timescale and frequency of the last 3 observation sets in the previous paragraph. ------------------------------------------------------------------------------------ 8. Additional comments or special requests. The first set of observations should be scheduled as soon as possible, because T Pyx is now overdue for eruption. These "before outburst" images are important to help interpret changes during outburst. ------------------------------------------------------------------------------------ 10. Resources to be supplied by investigator's institution(s). Sparcstation support. ------------------------------------------------------------------------------------ 11. Address Information Page 3 Name: Michael Shara Category: PI Institution: 3470 Address: 3700 San Martin Dr. City: Baltimore State: MD Zip Code: 21218 Country: USA Telephone: 410-516-4543 Telex (or e-mail): ------------------------------------------------------------------------------------ TARGET LIST a) Fixed Targets ID = 5482 [ 4] ------------------------------------------------------------------------------------------------------------------------------------ 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| | | | | | | | | ------------------------------------------------------------------------------------------------------------------------------------ 1 TPYX A RA=09H 04M 41.5S +/- 0.1S, 2000 1 V=18 +/-1, TYPE=A0 152,161 DEC=-32D 22' 47" +/- 1" ------------------------------------------------------------------------------------------------------------------------------------ EXPOSURE LOGSHEET ID = 5482 [ 5] ------------------------------------------------------------------------------------------------------------------------------------ 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 ------------------------------------------------------------------------------------------------------------------------------------ 0.064 DEFINE TPYX WFPC2 IMAGE PC1 F656N CR-SPLIT=NO 3 800S 1 CYCLE 4 FIL656N 1 ------------------------------------------------------------------------------------------------------------------------------------ 0.074 DEFINE TPYX WFPC2 IMAGE PC1 F658N CR-SPLIT=NO 3 800S 1 CYCLE 4 FIL658N 1 ------------------------------------------------------------------------------------------------------------------------------------ 0.14 DEFINE TPYX WFPC2 IMAGE PC1 F375N CR-SPLIT=NO 2 900S 2 CYCLE 4 FIL375N 4 ------------------------------------------------------------------------------------------------------------------------------------ 0.15 DEFINE TPYX WFPC2 IMAGE PC1 F375N CR-SPLIT=NO 2 900S 2 CYCLE 5 FIL375N 5 ------------------------------------------------------------------------------------------------------------------------------------ 0.16 DEFINE TPYX WFPC2 IMAGE PC1 F375N CR-SPLIT=NO 2 900S 2 CYCLE 6 FIL375N 6 ------------------------------------------------------------------------------------------------------------------------------------ 0.24 DEFINE TPYX WFPC2 IMAGE PC1 F450W CR-SPLIT=NO 2 180S 1 CYCLE 4 FIL450W 4 ------------------------------------------------------------------------------------------------------------------------------------ 0.25 DEFINE TPYX WFPC2 IMAGE PC1 F450W CR-SPLIT=NO 2 180S 1 CYCLE 5 FIL450W 5 ------------------------------------------------------------------------------------------------------------------------------------ 0.26 DEFINE TPYX WFPC2 IMAGE PC1 F450W CR-SPLIT=NO 2 180S 1 CYCLE 6 FIL450W 6 ------------------------------------------------------------------------------------------------------------------------------------ 0.34 DEFINE TPYX WFPC2 IMAGE PC1 F469N CR-SPLIT=NO 2 900S 1 CYCLE 4 FIL469N 4 ------------------------------------------------------------------------------------------------------------------------------------ 0.35 DEFINE TPYX WFPC2 IMAGE PC1 F469N CR-SPLIT=NO 2 900S 1 CYCLE 5 FIL469N 5 ------------------------------------------------------------------------------------------------------------------------------------ 0.36 DEFINE TPYX WFPC2 IMAGE PC1 F469N CR-SPLIT=NO 2 900S 1 CYCLE 6 FIL469N 6 ------------------------------------------------------------------------------------------------------------------------------------ 0.44 DEFINE TPYX WFPC2 IMAGE PC1 F502N CR-SPLIT=NO 2 900S 1 CYCLE 4 FIL502N 4 ------------------------------------------------------------------------------------------------------------------------------------ 0.45 DEFINE TPYX WFPC2 IMAGE PC1 F502N CR-SPLIT=NO 3 800S 1 CYCLE 5 FIL502N 5 ------------------------------------------------------------------------------------------------------------------------------------ EXPOSURE LOGSHEET ID = 5482 [ 6] ------------------------------------------------------------------------------------------------------------------------------------ 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 ------------------------------------------------------------------------------------------------------------------------------------ 0.46 DEFINE TPYX WFPC2 IMAGE PC1 F502N CR-SPLIT=NO 3 800S 1 CYCLE 6 FIL502N 6 ------------------------------------------------------------------------------------------------------------------------------------ 0.54 DEFINE TPYX WFPC2 IMAGE PC1 F622W CR-SPLIT=NO 3 120S 1 CYCLE 4 FIL622W 4 ------------------------------------------------------------------------------------------------------------------------------------ 0.55 DEFINE TPYX WFPC2 IMAGE PC1 F622W CR-SPLIT=NO 3 120S 1 CYCLE 5 FIL622W 5 ------------------------------------------------------------------------------------------------------------------------------------ 0.56 DEFINE TPYX WFPC2 IMAGE PC1 F622W CR-SPLIT=NO 3 120S 1 CYCLE 6 FIL622W 6 ------------------------------------------------------------------------------------------------------------------------------------ 0.64 DEFINE TPYX WFPC2 IMAGE PC1 F656N CR-SPLIT=NO 2 900S 1 CYCLE 4 FIL656N 4 ------------------------------------------------------------------------------------------------------------------------------------ 0.65 DEFINE TPYX WFPC2 IMAGE PC1 F656N CR-SPLIT=NO 3 900S 1 CYCLE 5 FIL656N 5 ------------------------------------------------------------------------------------------------------------------------------------ 0.66 DEFINE TPYX WFPC2 IMAGE PC1 F656N CR-SPLIT=NO 3 900S 1 CYCLE 6 FIL656N 6 ------------------------------------------------------------------------------------------------------------------------------------ 0.74 DEFINE TPYX WFPC2 IMAGE PC1 F658N CR-SPLIT=NO 2 900S 2 CYCLE 4 FIL658N 4 ------------------------------------------------------------------------------------------------------------------------------------ 0.75 DEFINE TPYX WFPC2 IMAGE PC1 F658N CR-SPLIT=NO 2 900S 2 CYCLE 5 FIL658N 5 ------------------------------------------------------------------------------------------------------------------------------------ 0.76 DEFINE TPYX WFPC2 IMAGE PC1 F658N CR-SPLIT=NO 2 900S 2 CYCLE 6 FIL658N 6 ------------------------------------------------------------------------------------------------------------------------------------ 1.1 USE FIL375N 4 ------------------------------------------------------------------------------------------------------------------------------------ 1.2 USE FIL450W 4 ------------------------------------------------------------------------------------------------------------------------------------ 1.3 USE FIL469N 4 ------------------------------------------------------------------------------------------------------------------------------------ EXPOSURE LOGSHEET ID = 5482 [ 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 ------------------------------------------------------------------------------------------------------------------------------------ 1.4 USE FIL502N 4 ------------------------------------------------------------------------------------------------------------------------------------ 1.5 USE FIL622W 4 ------------------------------------------------------------------------------------------------------------------------------------ 1.6 USE FIL656N 1 ------------------------------------------------------------------------------------------------------------------------------------ 1.7 USE GROUP 1.1-1.7 NO FIL658N GAP 1 SAME POS FOR 1.1- 1.6 AS 1.7 ------------------------------------------------------------------------------------------------------------------------------------ 2.1 USE FIL375N 4 ------------------------------------------------------------------------------------------------------------------------------------ 2.2 USE FIL450W 4 ------------------------------------------------------------------------------------------------------------------------------------ 2.3 USE FIL469N 4 ------------------------------------------------------------------------------------------------------------------------------------ 2.4 USE FIL502N 4 ------------------------------------------------------------------------------------------------------------------------------------ 2.5 USE FIL622W 4 ------------------------------------------------------------------------------------------------------------------------------------ 2.6 USE FIL656N 4 ------------------------------------------------------------------------------------------------------------------------------------ 2.7 USE GROUP 2.1-2.7 NO FIL658N GAP 4 SAME POS FOR 2.1- 2.6 AS 2.7 TARG OF OPP / 2.1- 2.7 ------------------------------------------------------------------------------------------------------------------------------------ 3.1 USE FIL375N 4 ------------------------------------------------------------------------------------------------------------------------------------ EXPOSURE LOGSHEET ID = 5482 [ 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 ------------------------------------------------------------------------------------------------------------------------------------ 3.2 USE FIL450W 4 ------------------------------------------------------------------------------------------------------------------------------------ 3.3 USE FIL469N 4 ------------------------------------------------------------------------------------------------------------------------------------ 3.4 USE FIL502N 4 ------------------------------------------------------------------------------------------------------------------------------------ 3.5 USE FIL622W 4 ------------------------------------------------------------------------------------------------------------------------------------ 3.6 USE FIL656N 4 ------------------------------------------------------------------------------------------------------------------------------------ 3.7 USE GROUP 3.1-3.7 NO FIL658N GAP 4 SAME POS FOR 3.1- 3.6 AS 3.7 TARG OF OPP / 3.1- 3.7 AFTER 2.1 BY 4D +/ - 1D ------------------------------------------------------------------------------------------------------------------------------------ 4.1 USE FIL375N 4 ------------------------------------------------------------------------------------------------------------------------------------ 4.2 USE FIL450W 4 ------------------------------------------------------------------------------------------------------------------------------------ 4.3 USE FIL469N 4 ------------------------------------------------------------------------------------------------------------------------------------ 4.4 USE FIL502N 4 ------------------------------------------------------------------------------------------------------------------------------------ 4.5 USE FIL622W 4 ------------------------------------------------------------------------------------------------------------------------------------ 4.6 USE FIL656N 4 ------------------------------------------------------------------------------------------------------------------------------------ EXPOSURE LOGSHEET ID = 5482 [ 9] ------------------------------------------------------------------------------------------------------------------------------------ 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 ------------------------------------------------------------------------------------------------------------------------------------ 4.7 USE GROUP 4.1-4.7 NO FIL658N GAP 4 SAME POS FOR 4.1- 4.6 AS 4.7 TARG OF OPP / 4.1- 4.7 AFTER 3.1 BY 5D +/ - 1D ------------------------------------------------------------------------------------------------------------------------------------ 5.1 USE FIL375N 4 ------------------------------------------------------------------------------------------------------------------------------------ 5.2 USE FIL450W 4 ------------------------------------------------------------------------------------------------------------------------------------ 5.3 USE FIL469N 4 ------------------------------------------------------------------------------------------------------------------------------------ 5.4 USE FIL502N 4 ------------------------------------------------------------------------------------------------------------------------------------ 5.5 USE FIL622W 4 ------------------------------------------------------------------------------------------------------------------------------------ 5.6 USE FIL656N 4 ------------------------------------------------------------------------------------------------------------------------------------ 5.7 USE GROUP 5.1-5.7 NO FIL658N GAP 4 SAME POS FOR 5.1- 5.6 AS 5.7 TARG OF OPP / 5.1- 5.7 AFTER 4.1 BY 10D + /- 2D ------------------------------------------------------------------------------------------------------------------------------------ 6.1 USE FIL375N 4 ------------------------------------------------------------------------------------------------------------------------------------ 6.2 USE FIL450W 4 ------------------------------------------------------------------------------------------------------------------------------------ EXPOSURE LOGSHEET ID = 5482 [ 10] ------------------------------------------------------------------------------------------------------------------------------------ 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 ------------------------------------------------------------------------------------------------------------------------------------ 6.3 USE FIL469N 4 ------------------------------------------------------------------------------------------------------------------------------------ 6.4 USE FIL502N 4 ------------------------------------------------------------------------------------------------------------------------------------ 6.5 USE FIL622W 4 ------------------------------------------------------------------------------------------------------------------------------------ 6.6 USE FIL656N 4 ------------------------------------------------------------------------------------------------------------------------------------ 6.7 USE GROUP 6.1-6.7 NO FIL658N GAP 4 SAME POS FOR 6.1- 6.6 AS 6.7 TARG OF OPP / 6.1- 6.7 AFTER 5.1 BY 20D + /- 2D ------------------------------------------------------------------------------------------------------------------------------------ 7.1 USE FIL375N 4 ------------------------------------------------------------------------------------------------------------------------------------ 7.2 USE FIL450W 4 ------------------------------------------------------------------------------------------------------------------------------------ 7.3 USE FIL469N 4 ------------------------------------------------------------------------------------------------------------------------------------ 7.4 USE FIL502N 4 ------------------------------------------------------------------------------------------------------------------------------------ 7.5 USE FIL622W 4 ------------------------------------------------------------------------------------------------------------------------------------ 7.6 USE FIL656N 4 ------------------------------------------------------------------------------------------------------------------------------------ EXPOSURE LOGSHEET ID = 5482 [ 11] ------------------------------------------------------------------------------------------------------------------------------------ 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 ------------------------------------------------------------------------------------------------------------------------------------ 7.7 USE GROUP 7.1-7.7 NO FIL658N GAP 4 SAME POS FOR 7.1- 7.6 AS 7.7 TARG OF OPP / 7.1- 7.7 AFTER 6.1 BY 60D + /- 3D ------------------------------------------------------------------------------------------------------------------------------------ 8.1 USE FIL375N 5 ------------------------------------------------------------------------------------------------------------------------------------ 8.2 USE FIL450W 5 ------------------------------------------------------------------------------------------------------------------------------------ 8.3 USE FIL469N 5 ------------------------------------------------------------------------------------------------------------------------------------ 8.4 USE FIL502N 5 ------------------------------------------------------------------------------------------------------------------------------------ 8.5 USE FIL622W 5 ------------------------------------------------------------------------------------------------------------------------------------ 8.6 USE FIL656N 5 ------------------------------------------------------------------------------------------------------------------------------------ 8.7 USE GROUP 8.1-8.7 NO FIL658N GAP 5 SAME POS FOR 8.1- 8.6 AS 8.7 TARG OF OPP / 8.1- 8.7 AFTER 7.1 BY 100D +/- 5D ------------------------------------------------------------------------------------------------------------------------------------ 9.1 USE FIL375N 6 ------------------------------------------------------------------------------------------------------------------------------------ 9.2 USE FIL450W 6 ------------------------------------------------------------------------------------------------------------------------------------ EXPOSURE LOGSHEET ID = 5482 [ 12] ------------------------------------------------------------------------------------------------------------------------------------ 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 ------------------------------------------------------------------------------------------------------------------------------------ 9.3 USE FIL469N 6 ------------------------------------------------------------------------------------------------------------------------------------ 9.4 USE FIL502N 6 ------------------------------------------------------------------------------------------------------------------------------------ 9.5 USE FIL622W 6 ------------------------------------------------------------------------------------------------------------------------------------ 9.6 USE FIL656N 6 ------------------------------------------------------------------------------------------------------------------------------------ 9.7 USE GROUP 9.1-9.7 NO FIL658N GAP 6 SAME POS FOR 9.1- 9.6 AS 9.7 TARG OF OPP / 9.1- 9.7 AFTER 8.1 BY 400D +/- 30D ------------------------------------------------------------------------------------------------------------------------------------ Summary Form for Proposal 5482 [ 13] Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Configurations WFPC2 ------------------------------------------------------------------------------------------------------------------------------------ Opmodes IMAGE ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters CR-SPLIT=NO ------------------------------------------------------------------------------------------------------------------------------------ Proposal for GO ------------------------------------------------------------------------------------------------------------------------------------ S/C Hours 22.00 ------------------------------------------------------------------------------------------------------------------------------------ Scientific Category INTERSTELLAR MEDIUM ------------------------------------------------------------------------------------------------------------------------------------ Scientific Sub-category NOVAE ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements CYCLE 4; CYCLE 5; CYCLE 6; GROUP 1.1-1.7 NO GAP; SAME POS FOR 1.1-1.6 AS 1.7; GROUP 2.1-2.7 NO GAP; SAME POS FOR 2.1-2.6 AS 2.7; TARG OF OPP / 2.1-2.7; GROUP 3.1-3.7 NO GAP; SAME POS FOR 3.1-3.6 AS 3.7; TARG OF OPP / 3.1-3.7; AFTER 2.1 BY 4D +/- 1D; GROUP 4.1-4.7 NO GAP; SAME POS FOR 4.1-4.6 AS 4.7; TARG OF OPP / 4.1-4.7; AFTER 3.1 BY 5D +/- 1D; GROUP 5.1-5.7 NO GAP; SAME POS FOR 5.1-5.6 AS 5.7; TARG OF OPP / 5.1-5.7; AFTER 4.1 BY 10D +/- 2D; GROUP 6.1-6.7 NO GAP; SAME POS FOR 6.1-6.6 AS 6.7; TARG OF OPP / 6.1-6.7; AFTER 5.1 BY 20D +/- 2D; GROUP 7.1-7.7 NO GAP; SAME POS FOR 7.1-7.6 AS 7.7; TARG OF OPP / 7.1-7.7; AFTER 6.1 BY 60D +/- 3D; GROUP 8.1-8.7 NO GAP; SAME POS FOR 8.1-8.6 AS 8.7; TARG OF OPP / 8.1-8.7; AFTER 7.1 BY 100D +/- 5D; GROUP 9.1-9.7 NO GAP; SAME POS FOR 9.1-9.6 AS 9.7; TARG OF OPP / 9.1-9.7; AFTER 8.1 BY 400D +/- 30D; ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F656N F658N F375N F450W F469N F502N F622W ------------------------------------------------------------------------------------------------------------------------------------ Target Names TPYX ------------------------------------------------------------------------------------------------------------------------------------