ASTROSAT CZTI

Data Quality Report

Orbit 00871

Creation date: 2024-06-27T14:04:05.995845
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/AS1P01_171T01_9000000126_00871cztM0_level2.evt modeM0/AS1P01_171T01_9000000126_00871cztM0_level2_quad_clean.evt
Size (bytes)1,105,208,64083,989,440
Size1.0 GB 80.1 MB
Events in quadrant A8,267,329520,947
Events in quadrant B8,952,618523,085
Events in quadrant C7,985,711512,884
Events in quadrant D7,803,583500,901

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01420
B01420
C01420
D01420

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0295150
B0315420
C0286700
D0281610

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0120
B0120
C0120
D0120

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6968210.301378%
B6968660.947187%
C696870.100459%
D6968250.358783%

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 7658 6969 255 255 3.33% 3.66%
B 7658 6969 438 438 5.72% 6.28%
C 7658 6969 163 163 2.13% 2.34%
D 7658 6969 222 222 2.90% 3.19%

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 12 133 68378 127.79 2135 2151 518.3
A 11 79 8538 12.32 2135 2151 518.3
A 10 133 7159 9.66 2135 2151 518.3
B 0 184 213747 404.08 2239 2250 523.4
B 0 220 120093 225.15 2239 2250 523.4
B 5 191 42632 77.15 2239 2250 523.4
C 3 111 25268 40.85 2030 2106 567.0
C 3 79 15275 23.22 2030 2106 567.0
C 15 241 11503 16.57 2030 2106 567.0
D 13 169 146851 240.41 1950 2020 602.4
D 13 73 109928 179.12 1950 2020 602.4
D 11 131 89659 145.48 1950 2020 602.4

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