ASTROSAT CZTI

Data Quality Report

Orbit 20180921_T02_092T01_9000002384_level2

Creation date: 2025-11-24T19:53:52.349653
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/AS1T02_092T01_9000002384cztM0_level2.fits modeM0/AS1T02_092T01_9000002384cztM0_level2_quad_clean.evt
Size (bytes)769,786,560736,315,200
Size734.1 MB 702.2 MB
Events in quadrant A4,746,9544,482,956
Events in quadrant B4,502,9564,384,836
Events in quadrant C4,571,8844,147,631
Events in quadrant D3,944,2663,739,158

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A016460
B016460
C016460
D016460

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01821990
B01856340
C01737990
D02160390

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01240
B01240
C01240
D01240

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A8087918692.310859%
B8087915441.909025%
C8087911511.423114%
D8087947795.908827%

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 92788 80872 0 0 0.00% 0.00%
B 92788 80870 0 0 0.00% 0.00%
C 92788 80873 0 0 0.00% 0.00%
D 92788 80803 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 4592 11.26 1235 1156 305.1
A 7 110 3680 8.27 1235 1156 305.1
A 9 19 3654 8.19 1235 1156 305.1
B 2 9 3687 10.93 1193 1137 233.4
B 2 8 3099 8.41 1193 1137 233.4
B 3 17 3005 8.01 1193 1137 233.4
C 12 241 3372 7.27 1206 1122 309.6
C 9 233 3098 6.38 1206 1122 309.6
C 2 191 3091 6.36 1206 1122 309.6
D 6 231 2905 6.3 1126 1023 298.8
D 3 14 2903 6.29 1126 1023 298.8
D 10 189 2826 6.03 1126 1023 298.8

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