ASTROSAT CZTI

Data Quality Report

Orbit 53764

Creation date: 2025-09-07T16:58:23.949346
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/AS1A14_022T04_9000006506_53764cztM0_level2.fits modeM0/AS1A14_022T04_9000006506_53764cztM0_level2_quad_clean.evt
Size (bytes)1,027,108,80068,509,440
Size979.5 MB 65.3 MB
Events in quadrant A17,098,28240,788
Events in quadrant B3,375,768665,648
Events in quadrant C11,436,494349,148
Events in quadrant D5,584,581545,349

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0555181
B0150521
C0386274
D0213031

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01380
B01380
C01380
D01380

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A020
B020
C020
D020

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6788644594.946965%
B67892934.315805%
C6788321147.304066%
D67895838.587421%

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 7013 6788 6183 6183 88.16% 91.09%
B 7014 6789 46 46 0.66% 0.68%
C 7014 6789 3005 3005 42.84% 44.26%
D 7014 6790 415 415 5.92% 6.11%

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 3 63 15629390 193971.75 320 311 80.6
A 0 8 95759 1184.6 320 311 80.6
A 5 241 23163 283.62 320 311 80.6
B 4 81 134772 861.01 724 696 155.7
B 5 185 117888 752.58 724 696 155.7
B 0 213 68460 435.16 724 696 155.7
C 1 241 6868300 46355.32 536 529 148.2
C 15 224 2021204 13638.93 536 529 148.2
C 13 3 108067 725.85 536 529 148.2
D 2 172 762692 3859.98 703 673 197.4
D 1 241 603147 3051.81 703 673 197.4
D 8 176 458757 2320.41 703 673 197.4

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