! File: 2660C.PROP ! Database: PEPDB ! Date: 17-FEB-1994:10:02:48 coverpage: title_1: QUASI-PERIODIC OSCILLATIONS IN AM HERCULIS BINARIES sci_cat: STELLAR ASTROPHYSICS sci_subcat: ERUPTIVE BINARIES proposal_for: GO pi_title: DR. pi_fname: HOWARD pi_mi: E. pi_lname: BOND pi_inst: STSCI pi_country: USA pi_phone: 301-338-4718 keywords_1: STARS: WHITE DWARFS, CATACLYSMIC VARIABLES, MAGNETIC keywords_2: FIELDS, RAPID OSCILLATIONS; HIGH-SPEED PHOTOMETRY; ACCRETION hours_pri: 6.00 num_pri: 8 hsp: X time_crit: X funds_amount: 56089 funds_length: 12 funds_date: NOV-90 pi_position: ASTRONOMER off_fname: H. off_mi: S. off_lname: STOCKMAN off_title: DEPUTY DIRECTOR off_inst: SPACE TELESCOPE SCIENCE INSTITUTE off_addr_1: 3700 SAN MARTIN DRIVE off_city: BALTIMORE off_state: MD off_zip: 21218 off_country: USA off_phone: 301-338-4730 ! end of coverpage abstract: line_1: AM Herculis variables are close-binary systems in which a white dwarf with a line_2: magnetic field of 20-40 MG accretes matter from a companion star. line_3: Theoretical studies of magnetically channeled accretion flows in such systems line_4: predict that the shock formed near the white dwarf should oscillate with line_5: periods ~0.1-1sec. Optical high-speed photometry has indeed shown the existence line_6: of such rapid oscillations in some AM Her binaries, but not in others. We will line_7: use HST to obtain simultaneous UV and optical high-speed photometry of several line_8: AM Her systes, in order to explore further the nature of the oscillations, and line_9: to extend the search into the UV. HSP observations of two syustems (VV Pup and line_10: ST LMi, in which the accreting magnetic pole periodically passes behind the line_11: limb of the white dwarf) will allow detailed eclipse mapping of the accretion line_12: column and the shock oscillations to be carried out. ! ! end of abstract general_form_proposers: lname: CHANMUGAM fname: G. title: DR. inst: LOUISIANA STATE UNIVERSITY country: USA ! lname: BOND fname: HOWARD title: P.I. mi: E. inst: STSCI country: USA ! ! end of general_form_proposers block general_form_text: question: 2 section: 1 line_1: (See original proposal for Scientific Justification) ! question: 3 section: 1 line_1: We will use the HSP in its PRISM mode to obtain photometry line_2: simultaneously in both the optical (F551W) and UV (F240W), with the line_3: aim of searching for high-frequency oscillations predicted to arise line_4: in the magnetic accretion columns of AM Her binaries. Since the line_5: predicted timescales are 0.1-1 sec, we will use integration times line_6: of 0.050 (visual) and 0.025 sec (UV) for all of the observations. line_7: Four systems (AN UMa, EF Eri, V834 Cen, and VV Pup) have already line_8: shown oscillations in the optical, and will be observed with HST in line_9: order to characterize the oscillations in the UV. The remaining line_10: four targets (AM Her, QQ Vul, ST LMi, and MR Ser) do not show line_11: optical oscillations, and we will test the prediction that they line_12: will be found in the UV. line_13: We hope to obtain photometric runs of as long as 30 minutes. line_14: However, since the program was awarded Supplemental priority, we line_15: emphasize that RUNS AS SHORT AS A FEW MINUTES WOULD BE OF GREAT line_16: SCIENTIFIC VALUE, and are acceptable if they can be fitted line_17: into the observing schedule. line_18: In two of the targets, VV Pup and ST LMi, the accretion column line_19: is periodically eclipsed when it passes behind the white dwarf. line_20: It would be especially valuable to follow these objects with line_21: high-speed photometry as they eclipse, and we have used the line_22: appropriate Special Requirements to request such timing. Again, line_23: however, observations scheduled at any time are better than none. ! question: 4 section: 1 line_1: (See original proposal) ! question: 5 section: 1 line_1: (See original proposal) ! question: 6 section: 1 line_1: As mentioned in item 3, we wish to observe critical orbital line_2: phases for two of the targets, VV Pup and ST LMi, which are line_3: self-eclipsing systems. We have requested timing such that a line_4: 30-min run would be centered on the eclipse. line_5: The other targets can be observed at any time, since their line_6: accretion columns are always visible. line_7: High-speed photometry runs as short as a few minutes would yield line_8: important science, so it is permissible to cut the 30 minutes line_9: requested on the Exposure Logsheet if that would make it line_10: possible to schedule the observation(s). ! question: 7 section: 1 line_1: (See original proposal) ! question: 8 section: 1 line_1: Note that one of our targets, ST LMi, is also being observed line_2: with the FOS by a Cycle-1 GO (program 2686). Moreover, AM Her, line_3: EF Eri, ST LMi, and VV Pup are being observed in the GTO line_4: programs 1051 (FOS) and/or 1155 (GHRS). Thus there will be line_5: several convenient opportunities to schedule our own Supplemental line_6: observations in sequence with other, High-priority observations line_7: of the same targets. ! question: 9 section: 1 line_1: N/A ! question: 10 section: 1 line_1: (See original proposal) ! !end of general form text general_form_address: lname: BOND fname: HOWARD mi: E. title: DR. category: PI inst: SPACE TELESCOPE SCIENCE INSTITUTE addr_1: 3700 SAN MARTIN DRIVE city: BALTIMORE state: MD zip: 21218 country: USA ! ! end of general_form_address records fixed_targets: targnum: 1 name_1: AM-HER name_2: GSC3533-1105 descr_1: STAR; WHITE DWARF; descr_2: VARIABLE; INTERACTING BINARY; descr_3: DWARF NOVA; PHOTOMETRY pos_1: PLATE-ID=00TB, pos_2: RA=18H 16M 13.34S +/- 0.7", pos_3: DEC=+49D 52' 04.1" +/- 0.7" equinox: J2000 comment_1: FOR EACH TARGET, V MAGNITUDE GIVEN comment_2: IS MAX. STARS VARY ON TIMESCALES comment_3: OF MINUTES TO MONTHS BY UP TO comment_4: SEVERAL MAGNITUDES. fluxnum_1: 1 fluxval_1: V=12 ! targnum: 2 name_1: AN-UMA descr_1: STAR; WHITE DWARF; descr_2: VARIABLE; INTERACTING BINARY; descr_3: DWARF NOVA; PHOTOMETRY pos_1: PLATE-ID=01R5, pos_2: RA=11H 04M 25.70S +/- 0.7", pos_3: DEC=+45D 03' 15.0" +/- 0.7" equinox: J2000 fluxnum_1: 1 fluxval_1: V=14.5 ! targnum: 3 name_1: EF-ERI name_2: 2A0311-227 name_3: GSC6439-120 descr_1: STAR; WHITE DWARF; descr_2: VARIABLE; INTERACTING BINARY; descr_3: DWARF NOVA; PHOTOMETRY pos_1: PLATE-ID=027U, pos_2: RA=03H 14M 13.03S +/- 0.7", pos_3: DEC=-22D 35' 41.3" +/- 0.7" equinox: J2000 fluxnum_1: 1 fluxval_1: V=13.7 ! targnum: 4 name_1: MR-SER descr_1: STAR; WHITE DWARF; descr_2: VARIABLE; INTERACTING BINARY; descr_3: DWARF NOVA; PHOTOMETRY pos_1: PLATE-ID=00GM, pos_2: RA=15H 52M 47.23S +/- 0.7", pos_3: DEC=+18D 56' 27.6" +/- 0.7" equinox: J2000 fluxnum_1: 1 fluxval_1: V=14.9 ! targnum: 5 name_1: QQ-VUL name_2: E2003+225 descr_1: STAR; WHITE DWARF; descr_2: VARIABLE; INTERACTING BINARY; descr_3: DWARF NOVA; PHOTOMETRY pos_1: PLATE-ID=00FF, pos_2: RA=20H 05M 41.94S +/- 0.7", pos_3: DEC=+22D 39' 59.1" +/- 0.7" equinox: J2000 fluxnum_1: 1 fluxval_1: V=14.5 ! targnum: 6 name_1: ST-LMI name_2: CW1103+253 descr_1: STAR; WHITE DWARF; descr_2: VARIABLE; INTERACTING BINARY; descr_3: DWARF NOVA; PHOTOMETRY pos_1: PLATE-ID=0256, pos_2: RA=11H 05M 39.75S +/- 0.7", pos_3: DEC=+25D 06' 28.9" +/- 0.7" equinox: J2000 fluxnum_1: 1 fluxval_1: V=15 ! targnum: 7 name_1: VV-PUP descr_1: STAR; WHITE DWARF; descr_2: VARIABLE; INTERACTING BINARY; descr_3: DWARF NOVA; PHOTOMETRY pos_1: PLATE-ID=01Z4, pos_2: RA=08H 15M 06.73S +/- 0.7", pos_3: DEC=-19D 03' 16.9" +/- 0.7" equinox: J2000 fluxnum_1: 1 fluxval_1: V=14.5 ! targnum: 8 name_1: V834-CEN name_2: E1405-451 descr_1: STAR; WHITE DWARF; descr_2: VARIABLE; INTERACTING BINARY; descr_3: DWARF NOVA; PHOTOMETRY pos_1: PLATE-ID=02MC, pos_2: RA=14H 09M 07.48S +/- 0.7", pos_3: DEC=-45D 17' 17.0" +/- 0.7" equinox: J2000 fluxnum_1: 1 fluxval_1: V=14.2 ! ! end of fixed targets ! No solar system records found ! No generic target records found exposure_logsheet: linenum: 1.000 sequence_1: DEFINE sequence_2: ACQ targname: # config: HSP/VIS opmode: ACQ num_exp: 1 time_per_exp: 40S fluxnum_1: 1 priority: # param_1: DATA-FORMAT=WORD ! linenum: 1.500 sequence_1: DEFINE sequence_2: BRIGHTACQ targname: # config: HSP/VIS opmode: ACQ num_exp: 1 time_per_exp: 10S fluxnum_1: 1 priority: # param_1: DATA-FORMAT=WORD ! linenum: 2.000 sequence_1: DEFINE sequence_2: RUN targname: # config: HSP/VIS opmode: PRISM aperture: 1.0 sp_element: F551W/F240W num_exp: 1 time_per_exp: 29.025M fluxnum_1: 1 priority: # param_1: SAMPLE-TIME=0.050, param_2: 2ND-SAMPLE=0.025 comment_1: ALTHOUGH 30-MIN RUNS HAVE BEEN comment_2: REQUESTED FOR EACH TARGET, RUNS AS comment_3: SHORT AS A FEW MINUTES ARE STILL comment_4: SCIENTIFICALLY USEFUL. NOTE THAT THE comment_5: 0.050-SEC SAMPLE IS FOR F551W, AND THE comment_6: 0.025-SEC SAMPLE IS FOR F240W. ! linenum: 3.000 sequence_1: USE sequence_2: ACQ targname: VV-PUP priority: 1 req_1: ONBOARD ACQ FOR 4 ! linenum: 4.000 sequence_1: USE sequence_2: RUN targname: ^ priority: ^ req_1: PHASE 0.851 +/- 0.050; req_2: ZERO-PHASE JD2427889.6558 +/- 0.0001D; req_3: PERIOD 0.0697468256D +/- 0.0000000003D ! linenum: 5.000 sequence_1: USE sequence_2: ACQ targname: V834-CEN priority: 2 req_1: ONBOARD ACQ FOR 6 ! linenum: 6.000 sequence_1: USE sequence_2: RUN targname: ^ priority: ^ ! linenum: 7.000 sequence_1: USE sequence_2: ACQ targname: EF-ERI priority: 3 req_1: ONBOARD ACQ FOR 8 ! linenum: 8.000 sequence_1: USE sequence_2: RUN targname: ^ priority: ^ ! linenum: 9.000 sequence_1: USE sequence_2: ACQ targname: AN-UMA priority: 3 req_1: ONBOARD ACQ FOR 10 ! linenum: 10.000 sequence_1: USE sequence_2: RUN targname: ^ priority: ^ ! linenum: 11.000 sequence_1: USE sequence_2: BRIGHTACQ targname: AM-HER priority: 4 req_1: ONBOARD ACQ FOR 12 ! linenum: 12.000 sequence_1: USE sequence_2: RUN targname: ^ priority: ^ ! linenum: 13.000 sequence_1: USE sequence_2: ACQ targname: ST-LMI priority: 5 req_1: ONBOARD ACQ FOR 14 ! linenum: 14.000 sequence_1: USE sequence_2: RUN targname: ^ priority: ^ req_1: PHASE 0.868 +/- 0.044; req_2: ZERO-PHASE JD2445059.7024 +/- 0.0003D; req_3: PERIOD 0.07908908D +/- 0.00000008D ! linenum: 15.000 sequence_1: USE sequence_2: ACQ targname: QQ-VUL priority: 6 req_1: ONBOARD ACQ FOR 16 ! linenum: 16.000 sequence_1: USE sequence_2: RUN targname: ^ priority: ^ ! linenum: 17.000 sequence_1: USE sequence_2: ACQ targname: MR-SER priority: 6 req_1: ONBOARD ACQ FOR 18 ! linenum: 18.000 sequence_1: USE sequence_2: RUN targname: ^ priority: ^ ! ! end of exposure logsheet ! No scan data records found