ASTROSAT CZTI

Data Quality Report

Orbit 31877

Creation date: 2024-06-27T20:33:47.591491
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/AS1A10_109T01_9000004646_31877cztM0_level2.evt modeM0/AS1A10_109T01_9000004646_31877cztM0_level2_quad_clean.evt
Size (bytes)531,227,520102,813,120
Size506.6 MB 98.1 MB
Events in quadrant A3,226,157690,973
Events in quadrant B5,144,468677,162
Events in quadrant C3,482,975656,423
Events in quadrant D3,801,621643,468

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01300
B01300
C01300
D01300

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0134151
B0196101
C0142521
D0153561

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A080
B080
C080
D080

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6386590.923896%
B63871412.207609%
C63871462.285893%
D63871271.988414%

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 7207 6388 0 0 0.00% 0.00%
B 7208 6389 8 8 0.11% 0.13%
C 7208 6389 7 7 0.10% 0.11%
D 7208 6389 67 67 0.93% 1.05%

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 13 254 10932 60.63 834 819 166.8
A 3 137 8400 45.45 834 819 166.8
A 0 226 6932 36.65 834 819 166.8
B 6 159 1712028 11127.05 814 795 153.8
B 0 183 123930 800.67 814 795 153.8
B 10 245 34991 222.35 814 795 153.8
C 3 233 179445 953.93 798 806 187.3
C 14 238 132207 701.68 798 806 187.3
C 0 10 31391 163.32 798 806 187.3
D 8 195 418760 2168.15 805 786 192.8
D 2 250 181964 939.82 805 786 192.8
D 12 233 112396 578.95 805 786 192.8

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