ASTROSAT CZTI

Data Quality Report

Orbit 20210305_T03_280T01_9000004222_level2

Creation date: 2025-12-22T12:52:33.314293
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/AS1T03_280T01_9000004222cztM0_level2.fits modeM0/AS1T03_280T01_9000004222cztM0_level2_quad_clean.evt
Size (bytes)248,434,56092,963,520
Size236.9 MB 88.7 MB
Events in quadrant A1,609,250330,515
Events in quadrant B1,513,422330,815
Events in quadrant C1,567,326314,553
Events in quadrant D1,213,276218,200

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0490
B0490
C0490
D0490

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0496900
B0539340
C0578930
D01084300

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04800
B04800
C04800
D04800

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A235151100.467787%
B235154301.828620%
C235155812.470763%
D23515592325.188178%

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 28455 23515 0 0 0.00% 0.00%
B 28455 23512 0 0 0.00% 0.00%
C 28455 23512 0 0 0.00% 0.00%
D 28455 23503 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 1616 12.0 419 396 101.6
A 0 30 1279 8.69 419 396 101.6
A 7 110 1232 8.23 419 396 101.6
B 2 9 1146 9.47 402 386 80.3
B 5 225 1029 8.01 402 386 80.3
B 5 128 1023 7.94 402 386 80.3
C 1 80 1242 8.04 414 393 105.5
C 1 81 1223 7.86 414 393 105.5
C 3 202 1179 7.45 414 393 105.5
D 15 46 1001 7.27 347 319 93.9
D 6 67 897 6.16 347 319 93.9
D 10 189 861 5.77 347 319 93.9

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