Page 1 PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only ID 5374 Report Date: 18-Jul-95:17:15 Version: ********** Check-in Date: ********** 1.Proposal Title: THE BRIGHT, MYSTERIOUS WHITE DWARF STAR PROCYON B CYCLE 4 MEDIUM ------------------------------------------------------------------------------------ 2. Scientific Category 3. Proposal For 4. Proposal Type 5. Continuation ID HOT STARS GO 1 Long Term yrs Sub Category WHITE DWARFS ------------------------------------------------------------------------------------ 6. Principal Investigator Institution Country Telephone Harry L Shipman UNIVERSITY OF DELAWARE USA 302 831 2986 ------------------------------------------------------------------------------------ 7. Abstract We request 1.5 hours of HST time in order to obtain images of Procyon B in a variety of filters with the WF/PC-2. These images will allow us, for the first time, to determine the temperature, radius, and spectral type of this star. The importance of Procyon B is that it is one of a handful of white dwarf stars which are in a visual binary system. These data will allow us to place Procyon B on the mass-radius relation, testing our concept of relativistic degeneracy. Furthermore, since the age of the system is known, we can determine the mass of Procyon B's progenitor star and thus provide an important fundamental datum to test theories of stellar mass loss. ------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------ 9. Est obs time (hours) pri: 0.20 par: 0 10. Num targs pri: 1 par: 0 ------------------------------------------------------------------------------------ 11. Instruments requested: WF/PC ------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------ Page 2 I. GENERAL FORM Proposal 5374 PI: Harry L Shipman Proposal Title: THE BRIGHT, MYSTERIOUS WHITE DWARF STAR PROCYON B CYCLE 4 MEDIUM ------------------------------------------------------------------------------------ 1. Proposers: Proposers Institution Country ESA ------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------ 3. Description of proposed observations. Observations in various filters should permit us to determine how bright Procyon B is, what its temperature is, and by using some carefully selected filter combinations around H-alpha and H-beta, determine whether it is a white dwarf of spectral type DA -- with hydrogen lines -- or type DZ -- without hydrogen lines. Our observing strategy calls for a wide variety of filters and exposure times. We seek to replicate a series of Johnson UBVRI observations, and make an observation in the ultraviolet, in addition to our observations near the hydrogen lines. ------------------------------------------------------------------------------------ 4. Justification of need for HST observations. As discussed in the "scientific justification" section, many observers have tried and failed to obtain clean data on Procyon B from the ground. The spatial resolution is simply insufficient. ------------------------------------------------------------------------------------ 5. Description of special scheduling requirements. None. ------------------------------------------------------------------------------------ 6. Description of special calibration exposures. None. ------------------------------------------------------------------------------------ 8. Additional comments or special requests. ------------------------------------------------------------------------------------ 9. Description of previous HST work. Shipman was PI and leader of a massive team of astronomers who obtained time in cycles 1 and 2 for a comprehensive attack on a variety of problems related to white dwarf stars. This project, under the title of "White Dwarf Stars," was allotted 17.5 hours of spacecraft time in cycle 1 and 15 hours in cycle 2. Program numbers were 2593 (cycle 1) and 3816 (cycle 2). Most team members agreed with me in believing that obtaining some data on Procyon B was one of the most important things to do with our precious HST time. We knew that obtaining clean data with an optically defective telescope was chancy. We have done all that we can do with the cycle 1 data, postponing work on some important spectra because Procyon B was more important. We took a chance, and did not succeed. We wish to try again. As for the remainder of our HST data, we have presented the spectra at a conference in the summer of 1992 and at the Phoenix AAS meeting. Three papers describing these results are in the final stages of preparation. ------------------------------------------------------------------------------------ 10. Resources to be supplied by investigator's institution(s). The PI's and the co-I's are all faculty members at universities, or equivalent, and the institutions are supporting this project by providing us with the time and facilities to do the research. The PI's institution will acquire a workstation which will be used for the data reduction. ------------------------------------------------------------------------------------ 11. Address Information Page 3 Name: Harry L Shipman Category: PI Institution: 1840 Address: Department of Physics and Astronomy University of Delaware City: Newark State: DE Zip Code: 19716 Country: USA Telephone: 302 831 2986 Telex (or e-mail): harrys@strauss.udel.edu ------------------------------------------------------------------------------------ Name: Howard Bond Category: Institution: 3470 Address: City: State: Zip Code: Country: USA Telephone: Telex (or e-mail): ------------------------------------------------------------------------------------ Name: James Liebert Category: Institution: 1212 Address: City: State: Zip Code: Country: USA Telephone: Telex (or e-mail): ------------------------------------------------------------------------------------ Name: Category: CON Institution: Address: City: State: Zip Code: Country: Telephone: Telex (or e-mail): ------------------------------------------------------------------------------------ Name: Scott Roby Category: Institution: 2986 Address: City: State: Zip Code: Country: USA Telephone: Telex (or e-mail): ------------------------------------------------------------------------------------ Name: Ed Sion Category: Institution: 3720 Address: City: State: Zip Code: Country: USA Telephone: Telex (or e-mail): ------------------------------------------------------------------------------------ TARGET LIST a) Fixed Targets ID = 5374 [ 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 ALPHA-C-MI-B A,136 RA=07H 36M 39.01215S +/- 1950.0 1 V=10.7 +/- 0.1 BD+5D1739 0.003S, DEC=+05D 20' 31.0195" +/- 0.02" Comments: THE FLUX VALUE GIVEN ABOVE IS FOR THE SCIENTIFIC TARGET PROCYON B. THE POSITION IS FOR PROCYON A, THE ONE WHICH WE WANT AT THE OPTIMUM CENTER OF THE PC TO START. IN CASE YOU NEED TO KNOW, THE V MAGNITUDE OF PROCYON A IS 0.4. PROCYON B IS ABOUT 5 ARCSEC NORTH OF PROCYON A. Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) B 1994.50 -0.0473 +/- 0.0000 -1.0290 +/- 0.0000 0.2850 +/- 0.0000 ------------------------------------------------------------------------------------------------------------------------------------ EXPOSURE LOGSHEET ID = 5374 [ 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 ------------------------------------------------------------------------------------------------------------------------------------ 1.01 ALPHA-C-MI- WFPC2 IMAGE PC1 F218W 2159 ATD-GAIN=15 1 0.11S 1 1 CYCLE 4 / 1.01- B 1.410 ORIENT 69D +/-10D / 1.010-1.410 SEQ 1.010-1.050 NON-INT ------------------------------------------------------------------------------------------------------------------------------------ 1.02 ALPHA-C-MI- WFPC2 IMAGE PC1 F218W 2159 CLOCKS=YES 1 35S 1 1 B ATD-GAIN=15 ------------------------------------------------------------------------------------------------------------------------------------ 1.03 ALPHA-C-MI- WFPC2 IMAGE PC1 F218W 2159 CLOCKS=YES 1 160S 1 1 B ATD-GAIN=15 ------------------------------------------------------------------------------------------------------------------------------------ 1.04 ALPHA-C-MI- WFPC2 IMAGE PC1 F255W 2159 ATD-GAIN=15 1 0.11S 1 1 B ------------------------------------------------------------------------------------------------------------------------------------ 1.05 ALPHA-C-MI- WFPC2 IMAGE PC1 F255W 2159 CLOCKS=YES 1 35S 1 1 B ATD-GAIN=15 ------------------------------------------------------------------------------------------------------------------------------------ 1.11 ALPHA-C-MI- WFPC2 IMAGE PC1 F569W 5623 ATD-GAIN=15 1 0.23S 1 1 B ------------------------------------------------------------------------------------------------------------------------------------ 1.12 ALPHA-C-MI- WFPC2 IMAGE PC1 F336W 3344 ATD-GAIN=15 1 5S 1 1 B ------------------------------------------------------------------------------------------------------------------------------------ 1.13 ALPHA-C-MI- WFPC2 IMAGE PC1 F439W 4300 ATD-GAIN=15 1 1S 1 1 B ------------------------------------------------------------------------------------------------------------------------------------ 1.14 ALPHA-C-MI- WFPC2 IMAGE PC1 F675W 6714 ATD-GAIN=15 1 0.23S 1 1 B ------------------------------------------------------------------------------------------------------------------------------------ 1.15 ALPHA-C-MI- WFPC2 IMAGE PC1 F791W 7829 ATD-GAIN=15 1 0.23S 1 1 B ------------------------------------------------------------------------------------------------------------------------------------ 1.2 ALPHA-C-MI- WFPC2 IMAGE PC1 F631N 6283 ATD-GAIN=15 1 5S 1 1 B ------------------------------------------------------------------------------------------------------------------------------------ 1.21 ALPHA-C-MI- WFPC2 IMAGE PC1 F656N 6563 ATD-GAIN=15 1 5S 1 1 B ------------------------------------------------------------------------------------------------------------------------------------ 1.22 ALPHA-C-MI- WFPC2 IMAGE PC1 F658N 6590 ATD-GAIN=15 1 5S 1 1 B ------------------------------------------------------------------------------------------------------------------------------------ 1.3 ALPHA-C-MI- WFPC2 IMAGE PC1 F469N 4694 CLOCKS=YES 1 10S 1 1 B ATD-GAIN=15 ------------------------------------------------------------------------------------------------------------------------------------ 1.31 ALPHA-C-MI- WFPC2 IMAGE PC1 F487N 4866 CLOCKS=YES 1 10S 1 1 B ATD-GAIN=15 ------------------------------------------------------------------------------------------------------------------------------------ 1.32 ALPHA-C-MI- WFPC2 IMAGE PC1 F502N 5013 CLOCKS=YES 1 10S 1 1 B ATD-GAIN=15 ------------------------------------------------------------------------------------------------------------------------------------ EXPOSURE LOGSHEET ID = 5374 [ 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 ------------------------------------------------------------------------------------------------------------------------------------ 1.41 ALPHA-C-MI- WFPC2 IMAGE PC1 F160BW 1523 CLOCKS=YES 1 600S 1 1 B ATD-GAIN=15 ------------------------------------------------------------------------------------------------------------------------------------ Summary Form for Proposal 5374 [ 7] Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Configurations WFPC2 ------------------------------------------------------------------------------------------------------------------------------------ Opmodes IMAGE ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters ATD-GAIN=15 CLOCKS=YES ------------------------------------------------------------------------------------------------------------------------------------ Proposal for GO ------------------------------------------------------------------------------------------------------------------------------------ S/C Hours 0.20 ------------------------------------------------------------------------------------------------------------------------------------ Scientific Category HOT STARS ------------------------------------------------------------------------------------------------------------------------------------ Scientific Sub-category WHITE DWARFS ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements CYCLE 4 / 1.01-1.410; ORIENT 69D +/-10D / 1.010-1.410; SEQ 1.010-1.050 NON-INT ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F218W F255W F569W F336W F439W F675W F791W F631N F656N F658N F469N F487N F502N F160BW ------------------------------------------------------------------------------------------------------------------------------------ Target Names ALPHA-C-MI-B BD+5D1739 ------------------------------------------------------------------------------------------------------------------------------------