ASTROSAT CZTI

Data Quality Report

Orbit 04539

Creation date: 2024-06-27T14:43:29.305970
Switch to: Orbit-wise | Merged OBSID-wise
web.py, SVN revision $Rev$

Source files: Data quality report (detailed, human readable) | Data quality report (concise, machine readable)

Observation information


Basic statistics of files

Param Original file Final file
FilenamemodeM0/AS1G05_250T01_9000000568_04539cztM0_level2.evt modeM0/AS1G05_250T01_9000000568_04539cztM0_level2_quad_clean.evt
Size (bytes)1,496,064,960210,816,000
Size1.4 GB 201.0 MB
Events in quadrant A17,535,4031,214,597
Events in quadrant B8,470,0281,331,286
Events in quadrant C8,802,3201,307,185
Events in quadrant D9,287,3931,292,398

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0644639
B0378433
C0392783
D0410647

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03680
B03680
C03680
D03680

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0210
B0210
C0210
D0210

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A17955353119.665831%
B179561270.707284%
C179562761.537091%
D179552821.570593%

Noise dominated fraction

Noise dominated data is calculated using 1-second bins in cleaned event files. If a bin has >2000 counts, and if more than 50% of those come from <1% of pixels, then it is considered to be noise-dominated and hence unusable.

Quadrant # 1 sec bins Bins with >0 counts Bins with >2000 counts High rate bins dominated by noise Noise dominated (total time) Noise dominated (detector-on time) Marked lightcurve
A 20157 17959 2067 2067 10.25% 11.51%
B 20157 17960 19 19 0.09% 0.11%
C 20157 17960 128 128 0.64% 0.71%
D 20156 17959 206 206 1.02% 1.15%

Top noisy pixels

Top three noisy pixels from each quadrant. If the there are fewer than three noisy pixels in the level2.evt file, extra rows are filled as -1

Pixel properties Quadrant properties
Quadrant DetID PixID Counts Sigma Mean Median Sigma
A 0 13 9898105 26956.1 1823 1783 367.1
A 8 15 253268 685.01 1823 1783 367.1
A 0 118 191865 517.75 1823 1783 367.1
B 15 204 203458 523.06 2028 1977 385.2
B 4 48 111502 284.33 2028 1977 385.2
B 4 80 78230 197.96 2028 1977 385.2
C 14 48 903058 1998.27 1950 1955 450.9
C 9 247 140552 307.35 1950 1955 450.9
C 1 3 81879 177.24 1950 1955 450.9
D 1 20 836974 1796.24 1944 1889 464.9
D 2 136 325766 696.65 1944 1889 464.9
D 13 235 280968 600.29 1944 1889 464.9

Detector plane histogram (DPH)

Histogram calculated using DETX and DETY for each event in the final _common_clean file

Quadrant A Quadrant B
Quadrant D Quadrant C

Count rate plots and images

Plot type Count rate plots Images
Comparison with Poisson distribution
Blue bars denote a histogram of data divided into 1 sec bins.
Red curve is a Poisson curve with rate = median count rate of data.
Quadrant-wise count rates
Data is divided into 100 sec bins
Module-wise count rates for Quadrant A
Data is divided into 100 sec bins
Module-wise count rates for Quadrant B
Data is divided into 100 sec bins
Module-wise count rates for Quadrant C
Data is divided into 100 sec bins
Module-wise count rates for Quadrant D
Data is divided into 100 sec bins

Housekeeping plots

Parameter Plot
CZT HV Monitor
D_VDD
Temperature 1
Veto HV Monitor
Veto LLD
Alpha Counter
_CPM_Rate
CZT Counter
+2.5 Volts monitor
+5 Volts monitor
_ROLL_ROT
_Roll_DEC
_Roll_RA
Veto Counter