ASTROSAT CZTI

Data Quality Report

Orbit 20211222_T04_088T01_9000004814_level2

Creation date: 2025-12-30T22:51:51.334560
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_088T01_9000004814cztM0_level2.fits modeM0/AS1T04_088T01_9000004814cztM0_level2_quad_clean.evt
Size (bytes)277,560,000245,436,480
Size264.7 MB 234.1 MB
Events in quadrant A1,742,3941,459,271
Events in quadrant B1,614,7901,412,110
Events in quadrant C1,729,3521,427,378
Events in quadrant D1,452,3841,266,776

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A05520
B05520
C05520
D05520

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0625300
B0779850
C0638980
D0940690

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01310
B01310
C01310
D01310

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A271486542.409017%
B2714821207.809047%
C271484051.491823%
D2714811724.317077%

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 38893 27106 0 0 0.00% 0.00%
B 38893 27116 0 0 0.00% 0.00%
C 38895 27129 0 0 0.00% 0.00%
D 38895 27131 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 9 19 1412 8.79 455 432 111.5
A 7 110 1380 8.5 455 432 111.5
A 14 95 1332 8.07 455 432 111.5
B 2 9 1312 10.59 428 412 84.9
B 3 80 1303 10.49 428 412 84.9
B 5 128 1146 8.64 428 412 84.9
C 1 81 1458 8.82 458 436 115.9
C 1 80 1361 7.98 458 436 115.9
C 3 203 1320 7.63 458 436 115.9
D 10 189 1109 6.68 416 382 108.7
D 10 113 1064 6.27 416 382 108.7
D 7 3 1057 6.21 416 382 108.7

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