6597( 6) - 01/28/97 09:44 - [ 0]
PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only
ID: 6597
Version: 6
Check-in Date: 28-Jan-1997
09:41:12
1.Proposal Title:
High-resolution imagery of the Bipolar, Rotating, Episodic Jet in the Planetary
Nebula PK112-001
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2. Scientific Category 3. Proposal For 4. Cycle
INTERSTELLAR MEDIUM GO 6
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5. Investigators
Contact?
PI: ALBERTO LOPEZ UNIVERSIDAD NACIONAL AUTONOMA DE MEXICO
CoI: John Meaburn University of Manchester N
CoI: Luis Rodriguez Universidad Nacional Autonoma de Mexico N
CoI: Roberto Vazquez Universidad Nacional Autonoma de Mexico N
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6. Abstract
Evidence for the existence of bipolar, rotating, episodic jets (BRETs) has now been
discovered in several planetary nebulae (PNe). These jets are characterized by
symmetric, diametrically opposite, collimated flows with observable, radiative, bow-
shocks around their leading edges. It is the spatial distributions of the resultant
knots of ionized gas which indicate rotations of the bi-polar, episodic jets. The
most spectacular candidate for this BRET classification has now been discovered
(Lopez et al, 1995). A giant (~ 14' * 4' ), but faint, bipolar halo has been found
to be extending from PK112-001 in which diametrically opposite pairs of collisionaly
ionized knots are present. The angular extent of this bipolar structure is the
largest one yet found around PNe and may indicate that it is the closest example of
the phenomenon. The top priority for the proposed HST observations is to obtain
imagery of the bright nebular core in the HAlpha, NII, SII and OIII nebular emission
lines, and in blue and red regions free of lines, with an angular resolution of 0.1"
to detect evidence of a central, collimating disk and/or a binary component to the
central star. In addition, imagery of the shock ionized filaments close to the core,
in the nebular emission lines, will reveal the changing ionization conditions along
the collimateds flows.
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Observations Description
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This project has been awarded 4 orbits. In Target_Number 1 (PK112-001-NUCLEUS),
we place the nucleus of the PN in WF2-FIX to image the core structure and its
surroundings making use of DITHERING to optimize resolution enhancement. Narrow
band emission line images (F656N,F658N,F673N) that guarantee the best results
will be obtained. The ORIENT parameter has been set to try to avoid potential
blooming effects on the core structure.
Real Time Justification
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Calibration Justification
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Additional Comments
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Data Distribution
Media: 8MM
Blocking Factor: 10
Ship To: PI_Address
Ship Via: UPS
Email: ,
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6597( 6) - 01/28/97 09:44 - [ 1]
TARGET LIST a) Fixed Targets
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Tar| Target | Target | Target |Coord | Radial | Flux data
No | Name | Description | Position |Eqnx | Vel. |
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1 PK112-001- ISM, Planetary Nebula, RA=23H 24M 10.40S +/- J2000 V = 19.5+/-1.0
NUCLEUS Nucleus 0.10S,DEC=60D 57' 31.00" +/- E(V-B) = 0.52
0.3",PLATE-ID=02RL F-LINE(6563)=1.4+/-0.4e-14
W-LINE(6563)=12.0+/-2.0
F-LINE(6584)=4.0+/-0.4e-14
W-LINE(6584)=12.0+/-12
F-LINE(6724)=6.9+/-0.4e-15
W-LINE(6724)=12+/-2.0
Comments: E(V-B) has been derived from the Balmer decrement of
the emission lines in the core of the PN. V mag. is a
crude estimate from the DSS Plate. The spectrum from
the core shows no apparent photospheric continuum in
our spectra. The line widths are wide for they come
from low dispersion data.
6597( 6) - 01/28/97 09:44 - [ 2]
Visit: 01
Visit Requirements: <none>
On Hold Comments: <none>
Additional Comments: <none>
Exposures
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Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special
Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements
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1 PK112-001-N WFPC2 IMAGE WF2-FIX F656N DITHER-TYPE=LINE,CR-SPLIT=0.5, 1 1000 S
UCLEUS CR-TOLERANCE=0.2
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2 PK112-001-N WFPC2 IMAGE WF2-FIX F656N DITHER-TYPE=LINE 1 400 S
UCLEUS
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3 PK112-001-N WFPC2 IMAGE WF2-FIX F673N DITHER-TYPE=LINE 1 500 S
UCLEUS
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4 PK112-001-N WFPC2 IMAGE WF2-FIX F673N DITHER-TYPE=LINE,CR-SPLIT=0.5, 1 1000 S
UCLEUS CR-TOLERANCE=0.2
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5 PK112-001-N WFPC2 IMAGE WF2-FIX F658N DITHER-TYPE=LINE,CR-SPLIT=0.5, 1 1000 S
UCLEUS CR-TOLERANCE=0.2
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6597( 6) - 01/28/97 09:44 - [ 3]
Summary Form for Proposal 6597
Item Used in this proposal
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Configurations WFPC2
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Opmodes IMAGE
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Optional Parameters DITHER-TYPE=LINE CR-SPLIT=0.5 CR-TOLERANCE=0.2
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Proposal Category GO
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Scientific Category INTERSTELLAR MEDIUM
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Spectral Elements F656N F673N F658N
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Target Names PK112-001-NUCLEUS
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