ASTROSAT CZTI

Data Quality Report

Orbit 35358

Creation date: 2022-04-13T10:21:33.640425
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_35358cztM0_level2.evt modeM0/AS1A11_099T01_9000005068_35358cztM0_level2_quad_clean.evt
Size (bytes)704,476,80060,085,440
Size671.8 MB 57.3 MB
Events in quadrant A7,032,624282,075
Events in quadrant B6,482,635362,104
Events in quadrant C3,160,277400,550
Events in quadrant D4,282,049382,291

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0260
B0260
C0260
D0270

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0245023
B0231302
C0126662
D0167392

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01140
B01140
C01140
D01140

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A5585197135.290958%
B5585131823.598926%
C55851502.685765%
D55851212.166517%

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 7198 5586 1710 1710 23.76% 30.61%
B 7198 5586 1009 1009 14.02% 18.06%
C 7198 5586 117 117 1.63% 2.09%
D 7198 5586 99 99 1.38% 1.77%

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 15 169 4958563 47089.0 513 502 105.3
A 10 83 72570 684.46 513 502 105.3
A 13 6 8623 77.13 513 502 105.3
B 4 251 3275098 28325.18 594 578 115.6
B 5 172 340302 2938.67 594 578 115.6
B 5 236 116866 1005.91 594 578 115.6
C 0 10 470347 3207.44 627 632 146.4
C 15 214 228936 1558.97 627 632 146.4
C 14 67 6605 40.79 627 632 146.4
D 8 195 1077087 6999.25 626 608 153.8
D 11 192 144147 933.29 626 608 153.8
D 2 152 109858 710.34 626 608 153.8

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