! 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