ASTROSAT CZTI

Data Quality Report

Orbit 20161022_A02_106T01_9000000744_level2

Creation date: 2025-11-07T02:54:45.658323
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/AS1A02_106T01_9000000744cztM0_level2.fits modeM0/AS1A02_106T01_9000000744cztM0_level2_quad_clean.evt
Size (bytes)944,000,640918,648,000
Size900.3 MB 876.1 MB
Events in quadrant A5,649,6765,376,967
Events in quadrant B5,543,8265,497,083
Events in quadrant C5,593,2085,181,856
Events in quadrant D4,772,0064,736,806

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01400
B01400
C01400
D01400

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02113160
B02150990
C02099050
D02249840

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A020860
B020860
C020840
D020860

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A10254113351.301918%
B10255913881.353367%
C1025628810.858993%
D10258019501.900955%

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 116845 102802 0 0 0.00% 0.00%
B 116845 102805 0 0 0.00% 0.00%
C 116845 102807 0 0 0.00% 0.00%
D 116845 102808 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 14 188 5500 11.04 1467 1368 374.2
A 0 29 5233 10.33 1467 1368 374.2
A 14 204 4845 9.29 1467 1368 374.2
B 2 9 4760 11.68 1457 1383 289.2
B 12 226 3989 9.01 1457 1383 289.2
B 14 254 3841 8.5 1457 1383 289.2
C 1 80 3987 6.6 1477 1360 398.2
C 12 241 3965 6.54 1477 1360 398.2
C 1 81 3941 6.48 1477 1360 398.2
D 11 82 3707 6.8 1360 1230 364.0
D 3 14 3687 6.75 1360 1230 364.0
D 6 231 3570 6.43 1360 1230 364.0

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