ASTROSAT CZTI

Data Quality Report

Orbit 35371

Creation date: 2022-04-16T10:06:30.221411
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/AS1A11_099T01_9000005068_35371cztM0_level2.evt modeM0/AS1A11_099T01_9000005068_35371cztM0_level2_quad_clean.evt
Size (bytes)851,846,40083,332,800
Size812.4 MB 79.5 MB
Events in quadrant A3,322,353563,660
Events in quadrant B11,607,012408,885
Events in quadrant C4,307,292544,314
Events in quadrant D6,077,055505,847

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0150
B0150
C0150
D0160

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0147443
B0393682
C0172302
D0228192

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01460
B01460
C01460
D01460

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A717160.083670%
B7171350548.877423%
C71711652.300934%
D71715507.669781%

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 8514 7172 0 0 0.00% 0.00%
B 8514 7172 3041 3041 35.72% 42.40%
C 8514 7172 138 138 1.62% 1.92%
D 8514 7172 504 504 5.92% 7.03%

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 10 83 140998 847.0 813 797 165.5
A 13 254 12987 73.64 813 797 165.5
A 13 6 12746 72.19 813 797 165.5
B 4 251 8796903 75616.25 599 584 116.3
B 5 172 207214 1776.26 599 584 116.3
B 5 200 98453 841.32 599 584 116.3
C 0 10 475843 2593.84 786 792 183.1
C 15 208 402309 2192.33 786 792 183.1
C 15 214 288667 1571.83 786 792 183.1
D 8 195 777290 4096.05 768 745 189.6
D 12 235 719413 3790.77 768 745 189.6
D 10 118 702546 3701.8 768 745 189.6

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