SAO/ASC
R. Hank Donnelly
CCW '04
Status of the HRC
Status of the HRC
Quantum Efficiency
Detector Uniformity
Confirmation of Model: Two Vela observations with opposite roll
positions indicate that detector performance agrees with ground based
model at energies above 150 eV. Please see Posson-Brown poster.
Detector Gain
- Accumulated Extracted Charge(AEC)
- Secular Trends:ArLac Standard Candles
- Voltage Adjustment: Conservative estimate of time until 5% of
events are lost below the LLD is longer than 4 years from now. IPI
team in conjunction with CXC determined that a voltage adjustment was
not yet required.
Miscellaneous
- Timing (Arnold Rots): Essentially unchanged from last year.
Comparison with XTE
indicates the clock (including the 285 microsecond offset) is good to
about 30 microseconds.
(Data separated by a year; used a single
Jodrell Bank timing ephemeris)
- Bad Pixel Map: Slight enlargement of a previously noted hot spot
on the central plate of the S detector.
http://asc.harvard.edu/cal/Hrc/badpix.html
- Instrument Timeline: Detailed timeline of the HRC and changes
relevant to it at http://asc.harvard.edu/cal/Hrc/Documents/timeline.html
- Filtering Documentation: Update of the web site detailing the
effects and history of filtering http://asc.harvard.edu/cal/Hrc/filter.html
- Posters at the Workshop
- Characterizing Non-linearities in the Chandra LETG+HRC-S
Dispersion Relation--Sun Mi Chung
- Chandra HRC-S Degapping Corrections from Flight and Lab
Data--Vinay Kashyap
- Studying the HRC-I Uniformity with Observations of the Vela
SNR--Jenny Posson-Brown
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