ASTROSAT CZTI

Data Quality Report

Orbit 35375

Creation date: 2022-04-18T10:20:33.245825
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_35375cztM0_level2.evt modeM0/AS1A11_099T01_9000005068_35375cztM0_level2_quad_clean.evt
Size (bytes)543,911,04057,401,280
Size518.7 MB 54.7 MB
Events in quadrant A2,785,041360,742
Events in quadrant B5,548,425329,331
Events in quadrant C3,250,257343,041
Events in quadrant D4,516,674320,065

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0350
B0350
C0350
D0350

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0115873
B0201392
C0127952
D0171612

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01140
B01140
C01140
D01140

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A548990.163964%
B5489103718.892330%
C54891632.969576%
D54893466.303516%

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 8982 5491 2 2 0.02% 0.04%
B 8982 5491 832 832 9.26% 15.15%
C 8982 5491 124 124 1.38% 2.26%
D 8982 5491 267 267 2.97% 4.86%

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 10 83 117168 863.03 668 656 135.0
A 14 254 36740 267.28 668 656 135.0
A 9 143 24443 176.19 668 656 135.0
B 4 251 2419752 20596.22 614 599 117.5
B 5 172 376045 3196.48 614 599 117.5
B 5 200 200335 1700.52 614 599 117.5
C 0 10 462758 3090.7 638 642 149.5
C 15 214 223816 1492.62 638 642 149.5
C 3 233 48832 322.3 638 642 149.5
D 8 195 988940 6410.9 627 610 154.2
D 12 233 412062 2668.92 627 610 154.2
D 13 249 275144 1780.79 627 610 154.2

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