ASTROSAT CZTI

Data Quality Report

Orbit 20210511_T04_003T01_9000004368_level2

Creation date: 2025-12-25T11:59:01.474877
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_003T01_9000004368cztM0_level2.fits modeM0/AS1T04_003T01_9000004368cztM0_level2_quad_clean.evt
Size (bytes)347,627,520345,404,160
Size331.5 MB 329.4 MB
Events in quadrant A2,123,2822,083,761
Events in quadrant B2,010,5622,074,754
Events in quadrant C2,067,3921,979,913
Events in quadrant D1,829,3981,825,318

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0752500
B01102400
C0801600
D0896260

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A07400
B07400
C07400
D07400

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0280
B0280
C0280
D0280

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A363546391.757716%
B363549622.646201%
C3635410202.805744%
D363548062.217088%

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 39049 36347 0 0 0.00% 0.00%
B 39049 36345 0 0 0.00% 0.00%
C 39049 36344 0 0 0.00% 0.00%
D 39049 36345 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 1826 9.57 554 520 136.5
A 7 110 1735 8.9 554 520 136.5
A 9 19 1628 8.12 554 520 136.5
B 2 9 1643 10.87 530 505 104.7
B 2 8 1427 8.81 530 505 104.7
B 3 17 1378 8.34 530 505 104.7
C 3 202 1564 7.54 546 510 139.8
C 3 203 1483 6.96 546 510 139.8
C 12 241 1475 6.9 546 510 139.8
D 15 46 1353 6.23 521 474 141.1
D 3 14 1347 6.19 521 474 141.1
D 10 189 1330 6.07 521 474 141.1

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