ASTROSAT CZTI

Data Quality Report

Orbit 20200217_A08_009T01_9000003516_level2

Creation date: 2025-12-09T10:24:25.280251
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/AS1A08_009T01_9000003516cztM0_level2.fits modeM0/AS1A08_009T01_9000003516cztM0_level2_quad_clean.evt
Size (bytes)729,938,880748,316,160
Size696.1 MB 713.6 MB
Events in quadrant A4,486,0784,574,129
Events in quadrant B4,304,4424,595,215
Events in quadrant C4,419,0004,424,308
Events in quadrant D3,788,6283,962,446

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01230
B01230
C01230
D01230

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A015220
B015220
C015220
D015220

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01537900
B01657650
C01575330
D01951300

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A744857010.941129%
B7448515202.040679%
C7448511781.581526%
D7448520202.711955%

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 86820 74475 0 0 0.00% 0.00%
B 86820 74475 0 0 0.00% 0.00%
C 86820 74478 0 0 0.00% 0.00%
D 86820 74449 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 4442 11.52 1166 1095 290.6
A 7 110 3679 8.89 1166 1095 290.6
A 0 30 3368 7.82 1166 1095 290.6
B 2 9 3402 10.32 1139 1090 224.1
B 2 8 2858 7.89 1139 1090 224.1
B 14 254 2803 7.64 1139 1090 224.1
C 1 80 3404 7.8 1166 1095 296.1
C 1 81 3377 7.71 1166 1095 296.1
C 12 241 3163 6.98 1166 1095 296.1
D 3 14 2824 6.39 1079 984 287.8
D 10 189 2653 5.8 1079 984 287.8
D 6 231 2640 5.75 1079 984 287.8

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