TIPS Meeting
SPACE TELESCOPE SCIENCE INSTITUTE
1
19 September 2002
Jennifer Mack
Hot Pixel Annealing: HRC
Riess, Mutchler,Vanorsow, and Cox
2500
~80% of
Hot Pixels
Annealed
Hot Pixels with e/s > 0.08
2000
1500
1000
500
0
0
30
60
90
Days since March 30th
120
150
TIPS Meeting
SPACE TELESCOPE SCIENCE INSTITUTE
2
19 September 2002
Jennifer Mack
Hot Pixel Annealing: WFC
Riess, Mutchler,Van Orsow, and Cox
~60% of
Hot Pixels
Annealed
Hot Pixels with e/s > 0.04
• ~1000 hotpix per day
• 400 not annealed
• In 1 year, 1% of pixels will
be hot ( like #CRs in 500 s)
80000
60000
40000
20000
• Need ASCS!! (order of
magnitude lower dark rate)
0
0
30
60
90
Days since March 30th
120
150
TIPS Meeting
SPACE TELESCOPE SCIENCE INSTITUTE
Coronagraph -
19 September 2002
Jennifer Mack
John Krist
• Position of occulting spots shifted inflight by ~1”
• Additional 5 pixel shift between April and June ... (Reason Unknown)
• SIAF updated to include these two shifts
• Stability monitoring with program 9669
3
TIPS Meeting
SPACE TELESCOPE SCIENCE INSTITUTE
4
19 September 2002
Jennifer Mack
WFC
Updated ACS Sensitivity
11% > at 7000A
De Marchi, Pavlovsky,
Bohlin, and Gilliland
HRC
9% > at 6000A
SBC
19% > at 1250A
TIPS Meeting
SPACE TELESCOPE SCIENCE INSTITUTE
Flat Fielding:
•
•
•
•
•
•
19 September 2002
Jennifer Mack
Mack, Bohlin, Gilliland,
and Van der Marel
Low-order Flat field corrections complete for WFC and HRC
Corrections ~ 6 to 18 percent from corner to corner depending on wavelength
F330W Earthflats match corrected HRC flats to within few millimag
Photometry accurate to 1% for both detectors
Accurate to ~2% for interpolated filters F550M, F625W, F660N
Polarizer and Coronagraphic Flats in progress...
WFC
HRC
5
TIPS Meeting
SPACE TELESCOPE SCIENCE INSTITUTE
Color-Magnitude Diagrams for 47 Tucanae:
ACS
WFPC2
Mack et al,
ISR 02-08
B~60 sec
V~60 sec
I ~60 sec
Zoccali et al 2001
B~14,000 sec
V~16,000 sec
I ~22,000 sec
19 September 2002
Jennifer Mack
6
TIPS Meeting
SPACE TELESCOPE SCIENCE INSTITUTE
ACS Pipeline status:
Hack and Van Orsow
♦ OPUS 14.1 installed (05-Sept-2002)
♦ CALACS version 4.1b (19-Aug-2002)
♦ PyDrizzle version 3.3 (12-Aug-2002)
– Uses 4th-order geometric distortion correction
Upcoming Activities:
♦ Polarizer and Coronagraphic Flats in progress
♦ Velocity abberations cause plate scale changes
– correction to be implemented in CALACS
– fix will improve combination of CR-SPLIT data
♦ Photometric transformations to ground, SDSS, WFPC2
Sirianni, Gilliland, and Mack
19 September 2002
Jennifer Mack
7