! $Id: 3856,v 4.1 1994/07/27 14:22:06 pepsa Exp $
coverpage:
title_1: A CRITICAL TEST OF THE GALACTIC ESCAPE VELOCITY AT R(SUN)-CONT OF
title_2: 2428
sci_cat: STELLAR POPULATIONS
sci_subcat: ASTROMETRY
proposal_for: GO
longterm: 3
cont_id: 2428
pi_fname: DARRELL
pi_mi: J.
pi_lname: MACCONNELL
pi_inst: COMPUTER SCIENCES CORPORATION
pi_country: USA
pi_phone: 301-338-4800
hours_pri: 8.30
num_pri: 14
fgs: Y
time_crit: Y
off_fname: ROSELLE
off_lname: HARDE
off_title: SR. CONTRACTS ADMIN.
off_inst: COMPUTER SCIENCES CORPORATION
off_addr_1: SYSTEM SCIENCES DIVISION
off_addr_2: 4061 POWDER MILL ROAD
off_city: CALVERTON
off_state: MD
off_zip: 20705
off_country: USA
off_phone: 301-572-3637
! end of coverpage
abstract:
line_1: We propose to measure the trigonometric parallaxes and proper motions of the
line_2: three high-proper motion stars which Carney, Latham, and Laird (1988) identify
line_3: as having the most extreme velocities known in the galactic rest frame. Using
line_4: these stars, they conclude that the local value of the escape velocity, V(esc),
line_5: is at least 500 k/s, and this leads them to draw other important conclusions
line_6: regarding the distribution of mass in the galactic disk. However, their
line_7: assigned distances, and hence the tangential velocities and V(esc) value,
line_8: depend on uncertain photometric corrections and reddening estimates. The
line_9: photometric distances they find are in the range 400-550 pc, so the parallaxes
line_10: are expected to be of the order of 2 milliarcsec. If these distances are
line_11: approximately correct, it will be possible to measure them at the 4-sigma level
line_12: using an FGS on the HST. It will be of great interest if the parallaxes are
line_13: smaller than the estimates of Carney, et al., since this would lead to a higher
line_14: value for the escape velocity and a larger mass for the galaxy. Alternatively,
line_15: if the parallaxes are found to be larger than they adopted, either V(esc) is
line_16: considerably smaller than 500 k/s or these three stars are not the most app-
line_17: ropriate for setting a limit on V(esc). NOTE added 16-Apr-1991: Three targets
line_18: changed to two, G166-37 and G233-27. This is Cycle 3 POS mode only.
line_19: NOTE added 09-Mar-1992: Target G233_27 dropped after TRANS obs. failed due to
!
! end of abstract
general_form_proposers:
lname: OSBORN
fname: WAYNE
mi: H.
inst: CENTRAL MICHIGAN UNIVERSITY
country: USA
!
lname: MACCONNELL
fname: DARRELL
title: P.I.
mi: J.
inst: COMPUTER SCIENCES CORPORATION
country: USA
!
! end of general_form_proposers block
general_form_text:
!
question: 3
section: 1
line_1: We plan to observe two high-pm stars and 7 to 9 reference
line_2: stars for each within the 4'x5' field of FGS 3
line_3: and its 180-deg inverse. They are to be observed during
line_4: 5 epochs covering two years near the maximum parallax
line_5: factor for each +/- one month. A program star
line_6: and its reference frame will be observed a total of 18 times:
line_7: a series of nine observations at one max. and a series of
line_8: six observations at the other. Given the expected accuracy
line_9: of 0.0016 arcsec for a single observ. with an FGS, the full
line_10: series should allow determinations of parallaxes with error
line_11: of no more than 0.0005 arcsec, which is only 25% of the ex-
line_12: pected value of the parallaxes of these stars, and of proper
line_13: motions at least as accurate as those currently available.
line_14: Proposal split was suggested by SPB & SPSS to speed up pro-
line_15: cessing and scheduling of TRANS observations in proposal 2428.
line_16: POS mode observations contained in this proposal are
line_17: conditional on the results of the TRANS mode observations---
line_18: the stars must be single. If a different astrometer is chosen
line_19: than the one currently specified (FGS 3), this proposal
line_20: will be revised.
!
!end of general form text
general_form_address:
lname: MACCONNELL
fname: DARRELL
mi: J.
title: DR.
category: PI
inst: COMPUTER SCIENCES CORP.
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: G166-37
descr_1: A,136
pos_1: PLATE-ID = 01TM,
pos_2: RA = 14H 34M 51.2S +/- 0.1S,
pos_3: DEC = +25D 10' 9" +/- 1"
equinox: 2000
pm_or_par: Y
pos_epoch_bj: J
pos_epoch_yr: 1982.40
ra_pm_val: -0.000221
dec_pm_val: -0.3300
an_prlx_val: 0.0055
an_prlx_unct: 0.0020
rv_or_z: V = +369
comment_1: PARALLAX PROGRAM STAR
fluxnum_1: 1
fluxval_1: V = 12.66 +/- 0.02
fluxnum_2: 2
fluxval_2: B = 13.34 +/- 0.02
!
targnum: 2
name_1: G166A-REF
descr_1: A,134
pos_1: PLATE-ID = 01TM,
pos_2: RA = 14H 34M 51.5S +/- 0.2S,
pos_3: DEC = +25D 8' 9" +/- 2"
equinox: 2000
pos_epoch_bj: J
pos_epoch_yr: 1982.40
comment_1: PARALLAX REFERENCE STAR
fluxnum_1: 1
fluxval_1: V = 12.3 +/- 0.5
!
targnum: 3
name_1: G166B-REF
descr_1: ^
pos_1: PLATE-ID = 01TM,
pos_2: RA = 14H 34M 57.6S +/- 0.2S,
pos_3: DEC = +25D 10' 13" +/- 2"
equinox: 2000
pos_epoch_bj: J
pos_epoch_yr: 1982.40
comment_1: PARALLAX REFERENCE STAR
fluxnum_1: 1
fluxval_1: V = 14.5 +/- 0.5
!
targnum: 4
name_1: G166L-REF
descr_1: ^
pos_1: PLATE-ID = 01TM,
pos_2: RA = 14H 34M 57.1S +/- 0.2S,
pos_3: DEC = +25D 11' 46" +/- 2"
equinox: 2000
pos_epoch_bj: J
pos_epoch_yr: 1982.40
comment_1: PARALLAX REFERENCE STAR
fluxnum_1: 1
fluxval_1: V = 14.6 +/- 0.5
!
targnum: 5
name_1: G166I-REF
descr_1: ^
pos_1: PLATE-ID = 01TM,
pos_2: RA = 14H 34M 48.0S +/- 0.2S,
pos_3: DEC = +25D 8' 3" +/- 2"
equinox: 2000
pos_epoch_bj: J
pos_epoch_yr: 1982.40
comment_1: PARALLAX REFERENCE STAR
fluxnum_1: 1
fluxval_1: V = 15.5 +/- 0.5
!
targnum: 6
name_1: G16-25
descr_1: A,136
pos_1: PLATE-ID = 01GB,
pos_2: RA = 16H 1M 22.1S +/- 0.1S,
pos_3: DEC = +5D 23' 48" +/- 1"
equinox: 2000
pm_or_par: Y
pos_epoch_bj: J
pos_epoch_yr: 1982.50
ra_pm_val: -0.021535
dec_pm_val: -0.2880
an_prlx_val: 0.0033
an_prlx_unct: 0.0010
rv_or_z: V = -100
comment_1: PARALLAX PROGRAM STAR
fluxnum_1: 1
fluxval_1: V = 13.34 +/- 0.02
fluxnum_2: 2
fluxval_2: B = 13.94 +/- 0.05
!
targnum: 7
name_1: G1625A-REF
descr_1: A,134
pos_1: PLATE-ID = 01GB,
pos_2: RA = 16H 1M 27.0S +/- 0.2S,
pos_3: DEC = +5D 24' 3" +/- 2"
equinox: 2000
pos_epoch_bj: J
pos_epoch_yr: 1982.50
comment_1: PARALLAX REFERENCE STAR
fluxnum_1: 1
fluxval_1: V = 15.5 +/- 0.5
!
targnum: 8
name_1: G1625B-REF
descr_1: ^
pos_1: PLATE-ID = 01GB,
pos_2: RA = 16H 1M 19.5S +/- 0.2S,
pos_3: DEC = +5D 22' 52" +/- 2"
equinox: 2000
pos_epoch_bj: J
pos_epoch_yr: 1982.50
comment_1: PARALLAX REFERENCE STAR
fluxnum_1: 1
fluxval_1: V = 15.8 +/- 0.5
!
targnum: 9
name_1: G1625C-REF
descr_1: ^
pos_1: PLATE-ID = 01GB,
pos_2: RA = 16H 1M 20.7S +/- 0.2S,
pos_3: DEC = +5D 24' 51" +/- 2"
equinox: 2000
pos_epoch_bj: J
pos_epoch_yr: 1982.50
comment_1: PARALLAX REFERENCE STAR
fluxnum_1: 1
fluxval_1: V = 15.5 +/- 0.5
!
targnum: 10
name_1: G1625F-REF
descr_1: A,134
pos_1: PLATE-ID = 01GB,
pos_2: RA = 16H 1M 12.2S +/- 0.2S,
pos_3: DEC = +5D 24' 8" +/- 2"
equinox: 2000
pos_epoch_bj: J
pos_epoch_yr: 1982.50
comment_1: PARALLAX REFERENCE STAR
fluxnum_1: 1
fluxval_1: V = 14.7 +/- 0.5
!
targnum: 11
name_1: G1625G-REF
descr_1: ^
pos_1: PLATE-ID = 01GB,
pos_2: RA = 16H 1M 12.1S +/- 0.2S,
pos_3: DEC = +5D 23' 17" +/- 2"
equinox: 2000
pos_epoch_bj: J
pos_epoch_yr: 1982.50
comment_1: PARALLAX REFERENCE STAR
fluxnum_1: 1
fluxval_1: V = 15.5 +/- 0.5
!
targnum: 14
name_1: G1625I-REF
descr_1: ^
pos_1: PLATE-ID = 01GB,
pos_2: RA = 16H 1M 25.2S +/- 0.2S,
pos_3: DEC = +5D 25' 22" +/- 2"
equinox: 2000
pos_epoch_bj: J
pos_epoch_yr: 1982.50
comment_1: PARALLAX REFERENCE STAR
fluxnum_1: 1
fluxval_1: V = 14.6 +/- 0.5
!
! end of fixed targets
! No solar system records found
! No generic target records found
exposure_logsheet:
linenum: 1.000
sequence_1: DEFINE
sequence_2: G166-SEQ1
targname: G166-37
config: FGS
opmode: POS
aperture: 3
sp_element: F583W
num_exp: 1
time_per_exp: 50S
priority: 1
param_1: DATA-RATE = 32
req_1: SEQ 1-6 NON-INT
!
linenum: 2.000
sequence_1: DEFINE
sequence_2: G166-SEQ1
targname: G166A-REF
config: FGS
opmode: POS
aperture: 3
sp_element: F583W
num_exp: 1
time_per_exp: 50S
priority: 1
param_1: DATA-RATE = 32
!
linenum: 3.000
sequence_1: DEFINE
sequence_2: G166-SEQ1
targname: G166B-REF
config: FGS
opmode: POS
aperture: 3
sp_element: F583W
num_exp: 1
time_per_exp: 100S
priority: 1
param_1: DATA-RATE = 32
req_1: DO FOR TARGS 3-5;
req_2: GROUP-FGS 1-6 WITHIN 50M
!
linenum: 4.000
sequence_1: DEFINE
sequence_2: G166-SEQ1
targname: G166A-REF
config: FGS
opmode: POS
aperture: 3
sp_element: F583W
num_exp: 1
time_per_exp: 50S
priority: 1
param_1: DATA-RATE = 32
!
linenum: 5.000
sequence_1: DEFINE
sequence_2: G166-SEQ1
targname: G166B-REF
config: FGS
opmode: POS
aperture: 3
sp_element: F583W
num_exp: 1
time_per_exp: 100S
priority: 1
param_1: DATA-RATE = 32
!
linenum: 6.000
sequence_1: DEFINE
sequence_2: G166-SEQ1
targname: G166-37
config: FGS
opmode: POS
aperture: 3
sp_element: F583W
num_exp: 1
time_per_exp: 50S
priority: 1
param_1: DATA-RATE = 32
!
linenum: 7.000
sequence_1: DEFINE
sequence_2: G1625-SEQ1
targname: G16-25
config: FGS
opmode: POS
aperture: 3
sp_element: F583W
num_exp: 1
time_per_exp: 50S
priority: 1
param_1: DATA-RATE = 32
req_1: SEQ 7-12 NON-INT
!
linenum: 8.000
sequence_1: DEFINE
sequence_2: G1625-SEQ1
targname: G1625I-REF
config: FGS
opmode: POS
aperture: 3
sp_element: F583W
num_exp: 1
time_per_exp: 50S
priority: 1
param_1: DATA-RATE = 32
!
linenum: 9.000
sequence_1: DEFINE
sequence_2: G1625-SEQ1
targname: G1625A-REF
config: FGS
opmode: POS
aperture: 3
sp_element: F583W
num_exp: 1
time_per_exp: 100S
priority: 1
param_1: DATA-RATE = 32
req_1: DO FOR TARGS 7-11;
req_2: GROUP-FGS 7-11 WITHIN 50M;
!
linenum: 11.000
sequence_1: DEFINE
sequence_2: G1625-SEQ1
targname: G1625F-REF
config: FGS
opmode: POS
aperture: 3
sp_element: F583W
num_exp: 1
time_per_exp: 50S
priority: 1
param_1: DATA-RATE = 32
!
linenum: 12.000
sequence_1: DEFINE
sequence_2: G1625-SEQ1
targname: G16-25
config: FGS
opmode: POS
aperture: 3
sp_element: F583W
num_exp: 1
time_per_exp: 50S
priority: 1
param_1: DATA-RATE = 32
!
linenum: 13.000
sequence_1: USE
sequence_2: G166-SEQ1
req_1: SEQ 13-18 NO GAP;
req_2: AT 19-FEB-94 +/- 4D;
req_3: CYCLE 4 / 13-18
comment_1: LINES 13-18 NEED TO BE SCHEDULED
comment_2: DURING SUCCESSIVE ORBITS
comment_3: TARGET G166-37 TO BE OBSERVED
comment_4: AT START AND END OF EACH ORBIT
!
linenum: 14.000
sequence_1: USE
sequence_2: G166-SEQ1
!
linenum: 15.000
sequence_1: USE
sequence_2: G166-SEQ1
!
linenum: 16.000
sequence_1: USE
sequence_2: G166-SEQ1
!
linenum: 17.000
sequence_1: USE
sequence_2: G166-SEQ1
!
linenum: 18.000
sequence_1: USE
sequence_2: G166-SEQ1
!
linenum: 19.000
sequence_1: USE
sequence_2: G166-SEQ1
req_1: GROUP 19-27 WITHIN 3D;
req_2: AT 14-JUL-94 +/- 3D;
req_3: CYCLE 4 / 19-27
comment_1: LINES 19-27 NEED TO BE SCHEDULED
comment_2: DURING SUCCESSIVE ORBITS
comment_3: TARGET G166-37 TO BE OBSERVED
comment_4: AT START AND END OF EACH ORBIT
!
linenum: 20.000
sequence_1: USE
sequence_2: G166-SEQ1
!
linenum: 21.000
sequence_1: USE
sequence_2: G166-SEQ1
!
linenum: 22.000
sequence_1: USE
sequence_2: G166-SEQ1
!
linenum: 23.000
sequence_1: USE
sequence_2: G166-SEQ1
!
linenum: 24.000
sequence_1: USE
sequence_2: G166-SEQ1
!
linenum: 25.000
sequence_1: USE
sequence_2: G166-SEQ1
!
linenum: 26.000
sequence_1: USE
sequence_2: G166-SEQ1
!
linenum: 27.000
sequence_1: USE
sequence_2: G166-SEQ1
!
linenum: 28.000
sequence_1: USE
sequence_2: G1625-SEQ1
req_1: SEQ 28-33 NO GAP;
req_2: AT 22-FEB-94 +/- 30D;
req_3: CYCLE 4 / 28-33
comment_1: LINES 28-33 NEED TO BE SCHEDULED
comment_2: DURING SUCCESSIVE ORBITS
comment_3: TARGET G16-25 TO BE OBSERVED
comment_4: AT START AND END OF EACH ORBIT
!
linenum: 29.000
sequence_1: USE
sequence_2: G1625-SEQ1
!
linenum: 30.000
sequence_1: USE
sequence_2: G1625-SEQ1
!
linenum: 31.000
sequence_1: USE
sequence_2: G1625-SEQ1
!
linenum: 32.000
sequence_1: USE
sequence_2: G1625-SEQ1
!
linenum: 33.000
sequence_1: USE
sequence_2: G1625-SEQ1
!
linenum: 34.000
sequence_1: USE
sequence_2: G1625-SEQ1
req_1: GROUP 34-42 WITHIN 3D;
req_2: AT 25-AUG-94 +/- 30D;
req_3: CYCLE 4 / 34-42
comment_1: LINES 34-42 NEED TO BE SCHEDULED
comment_2: DURING SUCCESSIVE ORBITS
comment_3: TARGET G16-25 TO BE OBSERVED
comment_4: AT START AND END OF EACH ORBIT
!
linenum: 35.000
sequence_1: USE
sequence_2: G1625-SEQ1
!
linenum: 36.000
sequence_1: USE
sequence_2: G1625-SEQ1
!
linenum: 37.000
sequence_1: USE
sequence_2: G1625-SEQ1
!
linenum: 38.000
sequence_1: USE
sequence_2: G1625-SEQ1
!
linenum: 39.000
sequence_1: USE
sequence_2: G1625-SEQ1
!
linenum: 40.000
sequence_1: USE
sequence_2: G1625-SEQ1
!
linenum: 41.000
sequence_1: USE
sequence_2: G1625-SEQ1
!
linenum: 42.000
sequence_1: USE
sequence_2: G1625-SEQ1
!
! end of exposure logsheet
! No scan data records found