ASTROSAT CZTI

Data Quality Report

Orbit 20180306_T02_012T07_9000001958_level2

Creation date: 2025-11-20T00:18:26.518192
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/AS1T02_012T07_9000001958cztM0_level2.fits modeM0/AS1T02_012T07_9000001958cztM0_level2_quad_clean.evt
Size (bytes)228,121,920209,580,480
Size217.6 MB 199.9 MB
Events in quadrant A1,420,6021,280,257
Events in quadrant B1,294,4961,143,928
Events in quadrant C1,400,0121,232,051
Events in quadrant D1,161,7281,059,743

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0502110
B0649340
C0488780
D0705190

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0500
B0500
C0500
D0500

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04800
B04800
C04800
D04800

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A237022080.877563%
B23702249110.509662%
C237021430.603325%
D2370218617.851658%

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 28607 23697 0 0 0.00% 0.00%
B 28607 23367 0 0 0.00% 0.00%
C 28607 23703 0 0 0.00% 0.00%
D 28607 23698 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 1381 11.28 370 348 91.6
A 7 110 1160 8.87 370 348 91.6
A 0 30 1044 7.6 370 348 91.6
B 2 9 1132 11.64 342 327 69.1
B 12 226 867 7.8 342 327 69.1
B 2 8 839 7.4 342 327 69.1
C 1 80 1044 7.17 369 345 97.5
C 12 241 1011 6.83 369 345 97.5
C 1 81 1000 6.72 369 345 97.5
D 3 14 881 6.44 331 302 89.9
D 6 231 838 5.96 331 302 89.9
D 7 5 830 5.87 331 302 89.9

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