Chandra Calibration Status

1
Chandra Calibration Status
New calibration products releases since last CUC
meeting.

• ACIS
• Gain correction files for epochs 33 and 34 were
  released in CALDB 3.4.5 (June 2008) and 3.5.0
  (Sep. 2008).

HETG
1. An order separation file (OSIP) for an ACIS
operating temperature of
T-110 C was released in CALDB 3.5.0.
2
New HRC-S Gain Map using SAMPS and LETG/HRC-S
Background Filtering
3
HRC-I Energy Resolution using SAMPS
4
Updated HRC-S QE Uniformity Map
HRC-S QEU Version 3
HRC-S QEU Version 4
Absorbed power-law model fit to Mkn421
5
Update on ACIS Filter Contamination
6
ACIS CC-Mode Calibration
CC-Mode calibration continues using trap maps
appropriate for CC-mode data. This approach does
not require any new software.
ACIS Flight Grades
7
Plot from the IACHEC Meeting comparing MOS, PN,
and ACIS spectral fitting results in the 2-7 keV
band for a sample of 7 clusters.
HRMA Calibration Projects
8
Comparison of ACIS derived temperatures in a
broad band, a hard band and from the H-like to
He-like Fe K alpha line ratio.
9
XRCF at MSFC
10
Two corrections have been applied to the
predictions of the raytrace code since XRCF.
Empirical XRCF correction
HRMA overlayer of 22A
11
Fits to the continuum source at XRCF with a
variable depth for the overlayer on each shell
28A
18A
27A
20A
12
HRMA Model A
13
HRMA Model F
14
The Coma Cluster
Model F
kT 8.3 keV
15
Comparison between ACIS and MOS derived Cluster
Temperatures
16
XMM-Newton Hard Band vs. Broad Band Temperatures
17
Cross-Calibration with E0102-72
18
Cluster Flux and Temperature Comparison
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Things to do

• Continue testing HRMA effective area models with
  in-flight imaging and gratings data.
• Adjust the HETG gratings transmission efficiency
  and the HRC-S QE accordingly.
• Validate the in-flight HRMA effective area model
  with gratings and cluster data.