ASTROSAT CZTI

Data Quality Report

Orbit 20180617_G08_057T09_9000002174_level2

Creation date: 2025-11-23T00:33:59.865310
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/AS1G08_057T09_9000002174cztM0_level2.fits modeM0/AS1G08_057T09_9000002174cztM0_level2_quad_clean.evt
Size (bytes)711,780,480669,458,880
Size678.8 MB 638.4 MB
Events in quadrant A4,374,1024,034,367
Events in quadrant B4,143,2903,901,953
Events in quadrant C4,243,4763,738,183
Events in quadrant D3,788,6763,592,833

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A014880
B014880
C014880
D014880

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01536400
B01561200
C01954150
D01528100

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01180
B01180
C01180
D01180

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A730277020.961288%
B7302711831.619949%
C730278031.099593%
D730275450.746299%

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 84772 73019 0 0 0.00% 0.00%
B 84772 73010 0 0 0.00% 0.00%
C 84772 73019 0 0 0.00% 0.00%
D 84772 73018 0 0 0.00% 0.00%

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 29 4168 11.01 1139 1070 281.5
A 7 110 3556 8.83 1139 1070 281.5
A 9 19 3278 7.84 1139 1070 281.5
B 2 9 3532 11.47 1095 1043 217.0
B 3 17 2782 8.01 1095 1043 217.0
B 3 80 2737 7.81 1095 1043 217.0
C 1 80 3194 7.4 1122 1048 289.8
C 1 81 3113 7.12 1122 1048 289.8
C 12 241 2935 6.51 1122 1048 289.8
D 3 14 2800 6.2 1081 985 292.6
D 6 231 2752 6.04 1081 985 292.6
D 7 3 2750 6.03 1081 985 292.6

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