ASTROSAT CZTI

Data Quality Report

Orbit 20220420_T04_095T01_9000005080_level2

Creation date: 2026-01-02T10:48:14.903584
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/AS1T04_095T01_9000005080cztM0_level2.fits modeM0/AS1T04_095T01_9000005080cztM0_level2_quad_clean.evt
Size (bytes)644,065,920861,768,000
Size614.2 MB 821.8 MB
Events in quadrant A4,055,5865,785,022
Events in quadrant B3,903,5785,947,552
Events in quadrant C3,097,2484,134,408
Events in quadrant D3,516,5905,315,407

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01805800
B01848860
C03406390
D01757820

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02630
B02630
C02630
D02630

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A014680
B014680
C014680
D014680

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7170144706.234223%
B7170131494.391849%
C717012427433.854479%
D7170119322.694523%

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 98221 71695 0 0 0.00% 0.00%
B 98221 71624 0 0 0.00% 0.00%
C 98221 69947 0 0 0.00% 0.00%
D 98221 71664 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 7 110 3347 9.13 1057 998 257.3
A 9 19 3214 8.61 1057 998 257.3
A 0 29 3199 8.56 1057 998 257.3
B 2 9 3285 11.47 1034 993 199.8
B 3 80 2995 10.02 1034 993 199.8
B 2 8 2779 8.94 1034 993 199.8
C 1 81 2619 8.77 818 768 211.0
C 1 80 2592 8.64 818 768 211.0
C 3 202 2415 7.8 818 768 211.0
D 4 160 2603 6.32 1006 922 266.1
D 6 62 2561 6.16 1006 922 266.1
D 7 3 2552 6.12 1006 922 266.1

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