! File: 2798C.PROP ! Database: PEPDB ! Date: 17-FEB-1994:14:14:52 coverpage: title_1: SO2 CONCENTRATION AND BRIGHTENING FOLLOWING ECLIPSES OF IO sci_cat: SOLAR SYSTEM proposal_for: GO/AM pi_title: MR. pi_fname: JAMES pi_mi: J pi_lname: SECOSKY pi_inst: BLOOMFIELD CENTRAL JUNIOR-SENIOR HIGH SCHOOL pi_country: USA pi_phone: 716 289-4525 keywords_1: IO, POSTECLIPSE BRIGHTENING, SO2 FROST, ATMOSPHERE, keywords_2: SULFUR hours_pri: 0.40 num_pri: 1 wf_pc: X time_crit: X pi_position: HIGH SCHOOL TEACHER ! end of coverpage abstract: line_1: Since 1964, photometric observations have sometimes reported a temporary line_2: brightening (about 0.1 magnitude of increase, lasting 10-15 minutes) of the line_3: Galilean satellite Io(JI) following eclipse. This study will image Io in 2 line_4: filters-peak wavelengths 3577 and 7120 A. This investigation attempts line_5: to determine areas of increased brightness and concentrations if SO2frost which line_6: is a hypothesised cause of the effect. ! ! end of abstract general_form_proposers: lname: SECOSKY fname: JAMES title: P.I. mi: J inst: BLOOMFIELD JUNIOR-SENIOR HIGH SCHOOL country: USA ! ! end of general_form_proposers block general_form_text: question: 2 section: 1 line_1: This investigation deals with post eclipse brightening on Io, line_2: a moon of Jupiter. Specifically, following eclipse Io will be line_3: imaged at a wavelength sensitive to SO2 frost and at a line_4: wavelength in Io's bright part of the spectrum. Images will be line_5: taken with the two filters repeatedly for 14 minutes. Analysis line_6: of the data will reveal areas of brightening, as well as areas line_7: which changed in amounts of SO2. ! question: 3 section: 1 line_1: Images will be taken with the planetary camera as soon as Io line_2: emerges from eclipse and continue until 3 exposures are made with line_3: each of the 2 filters. line_4: The F368M filter is sensitive to SO2 frost , while the F718M line_5: will show brightness in high wavelengths, it will be used to line_6: compare with measurements with F368M(low wavelength, SO2 frost line_7: reflectance); a ratio of the two should reveal SO2 frost. line_8: Comparing the images will show brightening and areas of SO2 frost; line_9: thus, testing if SO2 frost and the brightening appear in the same line_10: regions as predicted by Fanale et. al. (1981). These areas should be line_11: in the warmest parts of Io: the central portion. line_12: This study should be performed just after Jupiter is in line_13: opposition in order to increase the resolution. Jupiter is in line_14: opposition at intervals of 398.88 days; the next Jupiter line_15: opposition is in February of 1992. line_16: Meaningful data can be obtained within 3 months after opposition. line_17: Observations must begin immediatly after eclipse because line_18: the effect is strongest just after eclipse then decreases to line_19: zero in about 15 minutes. The goal is to obtain PC images of IO at line_20: as small a time interval as possible. ! question: 4 section: 1 line_1: Io's posteclipse brightening has been studied by numerous line_2: investigators since 1964. ST's unparalleled UV capabilities line_3: and consistently high spatial resolution will allow deter- line_4: mination of SO2 frost distribution on IO. ! question: 5 section: 1 line_1: The amount of exposure time will be quite low(around a sec.) line_2: since Io has an average magnitude of 5.0 and a maximum magnitude line_3: of 5.5. Io has a diameter of about 1 arcsec as seen from the line_4: Earth. ! question: 6 section: 1 line_1: The observations are time-critical as they deal with Io as line_2: it emerges from eclipse. line_3: For best resolution, the investigation should be conducted line_4: when Jupiter is near opposition, hence closer to the Earth. line_5: Io emerges from eclipse more than 18 arcsec from Jupiter line_6: at the following times. This list is continued in the line_7: '1992 APR 20 08:41:30' electronic version of the proposal line_8: '1992 APR 22 03:10:19' - lines had to be commented out line_9: '1992 APR 23 21:39:04' to fit the length restrictions. line_10: '1992 APR 25 16:07:55' Same for question 3. line_11: '1992 APR 27 10:36:39' line_12: '1992 APR 29 05:05:29' line_13: '1992 APR 30 23:34:15' line_14: '1992 MAY 02 18:03:06' line_15: '1992 MAY 04 12:31:50' line_16: '1992 MAY 06 07:00:41' line_17: '1992 MAY 08 01:29:26' line_18: '1992 MAY 09 19:58:18' line_19: '1992 MAY 11 14:27:02' line_20: '1992 MAY 13 08:55:53' line_21: '1992 MAY 15 03:24:40' line_22: '1992 MAY 16 21:53:31' line_23: '1992 MAY 18 16:22:15' ! question: 7 section: 1 line_1: PC images will be calibrated by the usual methods. line_2: Deconvolution will be performed with observations of the line_3: calibration star. Disk integrated brightnesses line_4: will be calculated, ratioed, and compared. line_5: In addition, a digital subtraction of the images should be line_6: performed. The F718M images will be interpolated to the line_7: times of the F368M images, using ground-based integrated line_8: brightness observations. ! question: 10 section: 1 line_1: My employer(Bloomfield Central School) will provide a line_2: substitute to teach my classes if I need extra time to work on line_3: this project. ! !end of general form text general_form_address: lname: SECOSKY fname: JAMES mi: J title: MR. category: PI inst: BLOOMFIELD CENTRAL JUNIOR-SENIOR HIGH SCHOOL addr_1: 24 OAKGROVE city: SHORTSVILLE state: NY zip: 14548 country: USA phone: (716) 289-4525 ! ! end of general_form_address records fixed_targets: targnum: 2 name_1: SAO099132 name_2: GS0084100433 descr_1: STAR descr_2: TYPE = G5 pos_1: PLATE-ID = 027Y, pos_2: RA = 10H 27M 12.29S +/- .3S, pos_3: DEC = +11D 19' 1.0" +/- .3" equinox: J2000 pos_epoch_bj: J pos_epoch_yr: 1950.00 ra_pm_val: -0.002153 ra_pm_unct: 0.000867 dec_pm_val: 0.0240 dec_pm_unct: 0.0100 comment_1: PSF STAR CANDIDATE fluxval_1: V = 6.72 +/- 0.4 ! targnum: 3 name_1: GS0083800105 name_2: SAO118325 descr_1: STAR descr_2: TYPE = G5 pos_1: PLATE-ID = 027Y, pos_2: RA = 10H 28M 55.89S +/- .2S, pos_3: DEC = +09D 33' 54.7" +/- .2" equinox: J2000 comment_1: PSF STAR BACKUP fluxval_1: V = 8.56 +/- 0.32 ! ! end of fixed targets solar_system_targets: targnum: 1 name_1: IO descr_1: SATELLITE IO lev1_1: STD = JUPITER lev2_1: STD = IO, wind_1: SEP OF IO JUPITER FROM EARTH GT 10", wind_2: OLG OF JUPITER BETWEEN 270 360 comment_1: WANT TO BEGIN OBSERVATIONS WITHIN comment_2: 1 MINUTE OF IO LEAVING THE comment_3: SHADOW OF JUPITER, BUT comment_4: NOT BEFORE END OF ECLIPSE. comment_5: OBSERVE UP TO 3 MONTHS AFTER comment_6: OPPOSITION. (92055-92153) fluxnum_1: 1 fluxval_1: SURF(V) = 5.0 +/- 0.5 ! ! end of solar system targets ! No generic target records found exposure_logsheet: linenum: 1.000 targname: IO config: PC opmode: IMAGE aperture: P7 sp_element: F718M wavelength: 7120 num_exp: 1 time_per_exp: 0.3S s_to_n: 100 fluxnum_1: 1 priority: 1 param_1: PRE-FLASH = NO, req_1: SEQ 1-3 NON-INT; req_2: GUID TOL 0.025"; req_3: REPEAT 1-3 EVERY 1.7691D +/- 30D req_4: FOR 2 MORE TIMES; req_5: CYCLE 1 /1-6; req_6: POS TARG -10,0 comment_1: 1ST EXPOSURE SHOULD BE TAKEN BETWEEN comment_2: 5 AND 65 S AFTER IO LEAVES JUPITER'S comment_3: SHADOW. OBSERVE WITHIN 3 MONTHS AFTER comment_4: OPPOSITION.COARSE1 TRACK. IO SHOULD comment_5: BE 10 ARCSEC FROM CENTER OF CHIP SO comment_6: THAT JUPITER IS OFF CHIP ENTIRELY. ! linenum: 2.000 targname: IO config: PC opmode: IMAGE aperture: P7 sp_element: F368M wavelength: 3577 num_exp: 3 time_per_exp: 7.0S s_to_n: 100 fluxnum_1: 1 priority: 1 param_1: PRE-FLASH = NO, req_1: GUID TOL 0.025"; req_2: POS TARG -10,0; ! linenum: 3.000 targname: IO config: PC opmode: IMAGE aperture: P7 sp_element: F718M wavelength: 7120 num_exp: 1 time_per_exp: 0.3S s_to_n: 100 fluxnum_1: 1 priority: 1 param_1: PRE-FLASH = NO, req_1: GUID TOL 0.025"; req_2: POS TARG -10,0; ! linenum: 5.000 targname: SAO099132 config: PC opmode: IMAGE aperture: P7 sp_element: F718M wavelength: 7120 num_exp: 1 time_per_exp: .3S priority: 1 req_1: POS TARG -10,0; comment_1: CALIBRATION STAR FOR PSF ! linenum: 6.000 targname: SAO099132 config: PC opmode: IMAGE aperture: P7 sp_element: F368M wavelength: 3577 num_exp: 1 time_per_exp: 7.0S priority: 1 req_1: POS TARG -10,0; comment_1: CALIBRATION STAR FOR PSF ! ! end of exposure logsheet ! No scan data records found