ASTROSAT CZTI

Data Quality Report

Orbit 52246

Creation date: 2025-07-21T13:49:51.025442
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/AS1C09_011T08_9000006472_52246cztM0_level2.fits modeM0/AS1C09_011T08_9000006472_52246cztM0_level2_quad_clean.evt
Size (bytes)699,744,96075,908,160
Size667.3 MB 72.4 MB
Events in quadrant A3,353,451541,720
Events in quadrant B4,944,858575,174
Events in quadrant C7,813,778397,136
Events in quadrant D9,331,257369,145

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01429619
B01883653
C02737654
D032091254

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A090
B090
C090
D090

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01220
B01220
C01220
D01220

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A59431412.372539%
B59382995.035365%
C5938174329.353318%
D5912183130.970907%

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 6870 5952 97 97 1.41% 1.63%
B 6871 5952 174 174 2.53% 2.92%
C 6871 5952 1522 1522 22.15% 25.57%
D 6871 5937 2105 2105 30.64% 35.46%

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 79 266442 1755.0 607 591 151.5
A 7 160 187929 1236.7 607 591 151.5
A 5 240 142594 937.42 607 591 151.5
B 10 254 1564345 12338.2 596 576 126.7
B 5 32 211714 1665.89 596 576 126.7
B 12 32 181391 1426.64 596 576 126.7
C 15 224 4242039 30689.94 499 493 138.2
C 1 45 451148 3260.74 499 493 138.2
C 9 38 290808 2100.59 499 493 138.2
D 6 42 6061658 40258.49 523 498 150.6
D 10 181 632203 4195.81 523 498 150.6
D 8 176 383166 2541.7 523 498 150.6

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