ASTROSAT CZTI

Data Quality Report

Orbit 20210224_A10_045T08_9000004208_level2

Creation date: 2021-03-01T11:41:58.012359
Switch to: Orbit-wise | Merged OBSID-wise
web.py, SVN revision $Rev: 1121 $

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/AS1A10_045T08_9000004208cztM0_level2_bc.evt modeM0/AS1A10_045T08_9000004208cztM0_level2_quad_clean.evt
Size (bytes)7,239,191,0401,573,989,120
Size6.7 GB 1.5 GB
Events in quadrant A27,101,2969,968,140
Events in quadrant B35,907,03610,084,695
Events in quadrant C80,220,8319,391,769
Events in quadrant D67,447,5509,579,245

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A025700
B025700
C025700
D025700

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02642710
B02997780
C04472210
D03998390

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01830
B01830
C01830
D01830

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A12622313801.093303%
B12622333952.689684%
C1262231633312.939797%
D12622375465.978308%

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 144393 126225 41 41 0.03% 0.03%
B 144393 126225 120 120 0.08% 0.10%
C 144393 126212 1043 1043 0.72% 0.83%
D 144393 126225 1313 1313 0.91% 1.04%

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 15 174 283129 188.4 6878 6770 1466.9
A 13 254 232668 154.0 6878 6770 1466.9
A 1 113 132326 85.59 6878 6770 1466.9
B 0 229 2441099 1887.0 6877 6719 1290.1
B 10 245 2367602 1830.03 6877 6719 1290.1
B 10 247 2038893 1575.23 6877 6719 1290.1
C 3 233 54482544 36732.39 6372 6363 1483.1
C 14 254 522644 348.12 6372 6363 1483.1
C 7 247 284305 187.41 6372 6363 1483.1
D 1 52 17342594 10446.35 6662 6499 1659.5
D 8 195 13190102 7944.15 6662 6499 1659.5
D 7 80 4594110 2764.39 6662 6499 1659.5

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