ASTROSAT CZTI

Data Quality Report

Orbit 35223

Creation date: 2022-04-04T19:45:29.481351
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/AS1C07_004T01_9000005052_35223cztM0_level2.evt modeM0/AS1C07_004T01_9000005052_35223cztM0_level2_quad_clean.evt
Size (bytes)877,368,96065,908,800
Size836.7 MB 62.9 MB
Events in quadrant A2,721,751455,593
Events in quadrant B9,352,219311,482
Events in quadrant C3,093,280452,909
Events in quadrant D11,018,316373,261

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0118213
B0316942
C0127822
D0366752

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01160
B01160
C01160
D01160

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0150
B0150
C0150
D0160

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A573290.157013%
B5732288950.401256%
C5732711.238660%
D5732248143.283322%

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 7106 5733 1 1 0.01% 0.02%
B 7105 5731 2130 2130 29.98% 37.17%
C 7106 5733 54 54 0.76% 0.94%
D 7106 5733 2799 2799 39.39% 48.82%

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 105559 781.12 663 650 134.3
A 13 6 19625 141.28 663 650 134.3
A 9 143 18941 136.19 663 650 134.3
B 5 236 5662022 57045.24 513 500 99.2
B 5 172 1603662 16153.39 513 500 99.2
B 0 156 22468 221.35 513 500 99.2
C 15 214 239081 1590.66 640 645 149.9
C 0 10 200985 1336.51 640 645 149.9
C 1 23 97209 644.2 640 645 149.9
D 8 195 6708295 47630.55 575 560 140.8
D 1 47 1451448 10302.52 575 560 140.8
D 13 249 129149 913.09 575 560 140.8

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