ASTROSAT CZTI

Data Quality Report

Orbit 20210330_T03_291T01_9000004278_level2

Creation date: 2025-12-23T19:30:04.291180
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/AS1T03_291T01_9000004278cztM0_level2.fits modeM0/AS1T03_291T01_9000004278cztM0_level2_quad_clean.evt
Size (bytes)5,775,992,6405,079,902,400
Size5.4 GB 4.7 GB
Events in quadrant A36,998,51431,121,788
Events in quadrant B34,252,67430,465,615
Events in quadrant C34,983,34628,804,612
Events in quadrant D29,405,12624,192,437

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0116940
B0116940
C0116940
D0116940

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A012196920
B018506500
C012828040
D017551490

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A08700
B08700
C08700
D08700

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A57326570241.225262%
B573269247604.319089%
C573268136582.382481%
D573266566649.884417%

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 675458 573239 0 0 0.00% 0.00%
B 675458 573228 0 0 0.00% 0.00%
C 675458 573174 0 0 0.00% 0.00%
D 675458 571287 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 30401 9.2 9664 9127 2312.5
A 7 110 29037 8.61 9664 9127 2312.5
A 9 19 27554 7.97 9664 9127 2312.5
B 2 9 26985 10.53 9084 8729 1732.9
B 5 128 22490 7.94 9084 8729 1732.9
B 2 8 22452 7.92 9084 8729 1732.9
C 12 241 24446 6.8 9259 8705 2313.9
C 3 126 23330 6.32 9259 8705 2313.9
C 9 209 23294 6.3 9259 8705 2313.9
D 15 46 22237 6.6 8408 7669 2206.9
D 10 189 20700 5.9 8408 7669 2206.9
D 7 3 20370 5.75 8408 7669 2206.9

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