ASTROSAT CZTI

Data Quality Report

Orbit 31761

Creation date: 2024-06-27T20:32:25.277613
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/AS1A10_059T02_9000004636_31761cztM0_level2.evt modeM0/AS1A10_059T02_9000004636_31761cztM0_level2_quad_clean.evt
Size (bytes)256,556,16025,139,520
Size244.7 MB 24.0 MB
Events in quadrant A2,326,759106,883
Events in quadrant B1,420,949195,443
Events in quadrant C2,356,608158,823
Events in quadrant D1,561,567187,187

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A090
B090
C090
D090

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0320
B0320
C0320
D0320

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A079501
B053351
C080571
D057791

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A150998765.407555%
B150918312.127237%
C150953135.188867%
D15081238.156499%

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 2404 1510 442 442 18.39% 29.27%
B 2404 1510 71 71 2.95% 4.70%
C 2404 1510 386 386 16.06% 25.56%
D 2403 1509 99 99 4.12% 6.56%

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 13 1920643 83338.16 104 102 23.0
A 13 254 1879 77.11 104 102 23.0
A 3 137 1080 42.44 104 102 23.0
B 6 159 425564 11579.1 180 176 36.7
B 5 172 252949 6880.5 180 176 36.7
B 5 255 15845 426.51 180 176 36.7
C 3 233 1474654 41165.19 146 147 35.8
C 0 10 277378 7739.72 146 147 35.8
C 14 238 23299 646.36 146 147 35.8
D 8 195 427284 9848.6 175 169 43.4
D 12 218 348021 8020.92 175 169 43.4
D 2 250 40114 921.07 175 169 43.4

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