ASTROSAT CZTI

Data Quality Report

Orbit 51490

Creation date: 2025-04-05T15:16:58.324543
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/AS1A13_090T01_9000006458_51490cztM0_level2.fits modeM0/AS1A13_090T01_9000006458_51490cztM0_level2_quad_clean.evt
Size (bytes)1,134,573,120115,200,000
Size1.1 GB 109.9 MB
Events in quadrant A12,347,711698,511
Events in quadrant B7,262,992853,802
Events in quadrant C8,356,394744,818
Events in quadrant D13,304,946537,509

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0433160
B0283640
C0314970
D0461550

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01880
B01880
C01880
D01880

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A9412206421.929452%
B9412107011.368466%
C9412128213.620909%
D9412307532.671058%

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 9412 9412 1594 1594 16.94% 16.94%
B 9412 9412 687 687 7.30% 7.30%
C 9412 9412 1169 1169 12.42% 12.42%
D 9412 9412 2905 2905 30.86% 30.86%

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 12 250 3593320 16151.09 907 888 222.4
A 12 3 2625258 11798.81 907 888 222.4
A 15 174 934493 4197.36 907 888 222.4
B 2 208 1617392 7980.51 943 911 202.6
B 12 32 1275313 6291.68 943 911 202.6
B 5 185 104147 509.67 943 911 202.6
C 0 177 3426379 13505.46 926 920 253.6
C 13 3 641404 2525.22 926 920 253.6
C 15 205 321508 1263.97 926 920 253.6
D 8 176 7754223 33543.58 827 797 231.1
D 7 60 1004359 4341.7 827 797 231.1
D 2 249 202661 873.32 827 797 231.1

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