ASTROSAT CZTI

Data Quality Report

Orbit 20180526_G08_075T01_9000002120_level2

Creation date: 2025-11-22T14:09:50.807345
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/AS1G08_075T01_9000002120cztM0_level2.fits modeM0/AS1G08_075T01_9000002120cztM0_level2_quad_clean.evt
Size (bytes)376,090,560285,068,160
Size358.7 MB 271.9 MB
Events in quadrant A2,348,1701,622,222
Events in quadrant B2,224,0781,544,766
Events in quadrant C2,285,4241,494,766
Events in quadrant D1,820,7541,261,806

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A08060
B08060
C08060
D08060

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0827180
B0944080
C0925600
D01279610

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0550
B0550
C0550
D0550

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A394268152.067164%
B3942617984.560442%
C394266551.661340%
D39426606715.388322%

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 56148 39422 0 0 0.00% 0.00%
B 56148 39421 0 0 0.00% 0.00%
C 56148 39424 0 0 0.00% 0.00%
D 56148 39226 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 2277 10.99 611 573 155.0
A 7 110 1916 8.66 611 573 155.0
A 0 30 1762 7.67 611 573 155.0
B 2 9 1887 11.28 587 560 117.7
B 3 80 1526 8.21 587 560 117.7
B 3 17 1462 7.66 587 560 117.7
C 1 81 1790 7.93 602 561 155.0
C 1 80 1761 7.74 602 561 155.0
C 12 241 1641 6.97 602 561 155.0
D 3 14 1366 6.4 519 472 139.6
D 6 231 1314 6.03 519 472 139.6
D 10 113 1285 5.82 519 472 139.6

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