ASTROSAT CZTI

Data Quality Report

Orbit 20181120_A05_206T01_9000002528_level2

Creation date: 2025-11-25T23:39:17.101548
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/AS1A05_206T01_9000002528cztM0_level2.fits modeM0/AS1A05_206T01_9000002528cztM0_level2_quad_clean.evt
Size (bytes)815,639,040915,984,000
Size777.9 MB 873.6 MB
Events in quadrant A4,921,9665,655,047
Events in quadrant B4,725,7065,689,133
Events in quadrant C4,906,4105,486,143
Events in quadrant D4,264,3865,031,318

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01220
B01220
C01220
D01220

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A017440
B017440
C017440
D017440

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01902080
B01982560
C01802310
D02007160

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A8579225232.940834%
B8579228683.342969%
C8579216681.944237%
D8579222702.645934%

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 97431 85791 0 0 0.00% 0.00%
B 97431 85777 0 0 0.00% 0.00%
C 97431 85789 0 0 0.00% 0.00%
D 97431 85778 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 4651 10.87 1281 1198 317.7
A 7 110 4008 8.84 1281 1198 317.7
A 0 30 3814 8.23 1281 1198 317.7
B 2 9 4018 11.72 1252 1198 240.6
B 2 8 3295 8.72 1252 1198 240.6
B 3 17 3183 8.25 1252 1198 240.6
C 12 241 3445 6.81 1297 1215 327.3
C 3 126 3342 6.5 1297 1215 327.3
C 2 191 3229 6.15 1297 1215 327.3
D 3 14 3176 6.49 1215 1109 318.4
D 6 231 3116 6.3 1215 1109 318.4
D 7 3 2965 5.83 1215 1109 318.4

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