Page 1 PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only ID 5509 Report Date: 18-Jul-95:17:33 Version: ********** Check-in Date: ********** 1.Proposal Title: FOS SPECTRA OF NPN 7027 CYCLE4MEDIUM ------------------------------------------------------------------------------------ 2. Scientific Category 3. Proposal For 4. Proposal Type 5. Continuation ID STELLAR ASTROPHYSICS GO Sub Category SUBLUMINOUS STARS ------------------------------------------------------------------------------------ 6. Principal Investigator Institution Country Telephone Sara R. Heap NASA, GODDARD SPACE FLIGHT C USA 301-286-5359 ------------------------------------------------------------------------------------ 7. Abstract The FOS will be used to obtain a spectrum of the central star of the planetary nebulae, NGC 7027, in order to determine its temperature and composition. ------------------------------------------------------------------------------------ 8. Scientific Key Words: PLANETARY NEBULAE, PLANETARY NUCLEI ------------------------------------------------------------------------------------ 9. Est obs time (hours) pri: 3.35 par: 0 10. Num targs pri: 1 par: 0 ------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------ Page 2 I. GENERAL FORM Proposal 5509 PI: Sara R. Heap Proposal Title: FOS SPECTRA OF NPN 7027 CYCLE4MEDIUM ------------------------------------------------------------------------------------ 1. Proposers: Proposers Institution Country ESA ------------------------------------------------------------------------------------ Sara R. Heap NASA, GODDARD SPACE FLIGHT USA CENTER Thierry Lanz SWISS NSF FELLOW AT GODDARD USA SPACE FLIGHT CENTER Ivan Hubeny NASA, GODDARD SPACE FLIGHT USA CENTER ------------------------------------------------------------------------------------ 3. Description of proposed observations. We'll obtain 2 FOS spectra of the central star of NGC 7027. ------------------------------------------------------------------------------------ 4. Justification of need for HST observations. High spatial resolution is necessary to isolate the central from the bright surrounding nebula. ------------------------------------------------------------------------------------ 5. Description of special scheduling requirements. No special scheduling requirements are expected. ------------------------------------------------------------------------------------ 6. Description of special calibration exposures. The central star of NGC 7027 is very faint and embedded in bright nebulosity. ------------------------------------------------------------------------------------ 13. ------------------------------------------------------------------------------------ 11. Address Information Name: SARA R. HEAP Category: PI Institution: GODDARD SPACE FLIGHT CENTER Address: CODE 681 City: GREENBELT State: MD Zip Code: 20771 Country: USA Telephone: 301-286-9545 Telex (or e-mail): ------------------------------------------------------------------------------------ TARGET LIST a) Fixed Targets ID = 5509 [ 3] ------------------------------------------------------------------------------------------------------------------------------------ 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| | | | | | | | | ------------------------------------------------------------------------------------------------------------------------------------ 4 NGC7027- A, 184 RA=21H 07M 2.695S +/- 0.75", 2000 OFFSET DEC= +42D 14' 10.09" +/- 0.75" Comments: COORDINATES ARE MEASURED FROM PLATE (TAKEN AT CFHT UNDER VERY GOOD SEEING) USING THE GSSS. HST WILL EXECUTE BLIND OFFSET TO NGC7027-STAR. ------------------------------------------------------------------------------------------------------------------------------------ 6 NGC7027-STAR A, 184 RA-OFF= -0.933S +/- 0.027S, 2000 BKG 1 F(4800)=0.128E-14 DEC-OFF= -0.100" +/- 0.3", 2 V=16.0, E(B-V)=0.90 FROM 4 Comments: COORDINATES ARE MEASURED FROM PLATE (TAKEN AT CFHT UNDER 0.7" SEEING) USING THE GSSS. HST WILL EXECUTE BLIND OFFSET FROM NGC7027-OFFSET. ------------------------------------------------------------------------------------------------------------------------------------ 7 NGC7027-NEB RA-OFF= -0.933S +/- 0.027S, 2000 DEC-OFF= -2.100" +/- 0.3", FROM 4 Comments: NEBULAR BKG 2" S OF CSPN ------------------------------------------------------------------------------------------------------------------------------------ EXPOSURE LOGSHEET ID = 5509 [ 4] ------------------------------------------------------------------------------------------------------------------------------------ 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 ------------------------------------------------------------------------------------------------------------------------------------ 140 NGC7027- FOS/RD ACQ/ 4.3 MIRROR BRIGHT=300000 1 8S 1 ONBOARD ACQ FOR OFFSET BINARY 140.5 CYCLE 4 Comments: TEXP FROM TABLE 2.1.2 REF STAR IS V=15.3 K0 III STAR TEXP=4.5*10^(.4*0.3)=5.93S BRIGHT FROM TONY K. IN CYCLE2 ------------------------------------------------------------------------------------------------------------------------------------ 140.5 NGC7027- FOS/RD ACQ/ 0.5 G570H 5430- SEARCH-SIZE-X=5 1 10S 1 1 ONBOARD ACQ FOR STAR PEAK 5730 SEARCH-SIZE-Y=5 141 SCAN-STEP-X=0.3 CYCLE 4 SCAN-STEP-Y=0.3 Comments: TDWELL BASED ON CSPN V=16.0 ESTIMATED COUNTS = 1.6 C/S/D * 10 S * 69 DIODES = 1100 COUNTS PER DWELL POINT OVERHEAD: 4.5 +0.7*4*4 = 15.7M ------------------------------------------------------------------------------------------------------------------------------------ 141 NGC7027- FOS/RD ACCUM 0.5 G570H 2 28M 1 1 CYCLE 4 STAR ------------------------------------------------------------------------------------------------------------------------------------ 142 NGC7027- FOS/RD ACCUM 0.5 G400H 2 28M 1 1 CYCLE 4 STAR ------------------------------------------------------------------------------------------------------------------------------------ Summary Form for Proposal 5509 [ 5] Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Configurations FOS/RD ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACQ/BINARY ACQ/PEAK ACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters BRIGHT=300000 SEARCH-SIZE-X=5 SEARCH-SIZE-Y=5 SCAN-STEP-X=0.3 SCAN-STEP-Y=0.3 ------------------------------------------------------------------------------------------------------------------------------------ Proposal for GO ------------------------------------------------------------------------------------------------------------------------------------ S/C Hours 3.35 ------------------------------------------------------------------------------------------------------------------------------------ Scientific Category STELLAR ASTROPHYSICS ------------------------------------------------------------------------------------------------------------------------------------ Scientific Sub-category SUBLUMINOUS STARS ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements ONBOARD ACQ FOR 140.5; CYCLE 4 ONBOARD ACQ FOR 141; CYCLE 4 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements MIRROR G570H G400H ------------------------------------------------------------------------------------------------------------------------------------ Target Names NGC7027-OFFSET NGC7027-STAR NGC7027-NEB ------------------------------------------------------------------------------------------------------------------------------------