ASTROSAT CZTI

Data Quality Report

Orbit 51469

Creation date: 2025-04-04T04:23:31.768119
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/AS1A13_090T01_9000006458_51469cztM0_level2.fits modeM0/AS1A13_090T01_9000006458_51469cztM0_level2_quad_clean.evt
Size (bytes)665,573,76099,912,960
Size634.7 MB 95.3 MB
Events in quadrant A7,506,665639,960
Events in quadrant B5,707,815724,070
Events in quadrant C3,611,805651,162
Events in quadrant D7,256,159510,519

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0273262
B0218252
C0161342
D0266152

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A090
B0100
C0100
D0100

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01460
B01460
C01460
D01460

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A71706999.748954%
B71703314.616457%
C71691151.604129%
D7169131318.314967%

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 7735 7171 417 417 5.39% 5.82%
B 7735 7171 162 162 2.09% 2.26%
C 7734 7170 74 74 0.96% 1.03%
D 7734 7170 1058 1058 13.68% 14.76%

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 12 3 2506734 13432.83 753 735 186.6
A 12 250 437603 2341.73 753 735 186.6
A 8 249 432879 2316.41 753 735 186.6
B 10 254 1866916 11434.61 766 740 163.2
B 4 206 220311 1345.38 766 740 163.2
B 4 81 86549 525.78 766 740 163.2
C 13 3 379778 1826.29 753 748 207.5
C 12 252 67335 320.84 753 748 207.5
C 15 250 46981 222.77 753 748 207.5
D 8 176 4058583 21919.97 657 635 185.1
D 2 249 144524 777.25 657 635 185.1
D 12 218 76063 407.44 657 635 185.1

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