ASTROSAT CZTI

Data Quality Report

Orbit 35496

Creation date: 2022-04-22T12:08:33.087698
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_097T22_9000005082_35496cztM0_level2.evt modeM0/AS1A11_097T22_9000005082_35496cztM0_level2_quad_clean.evt
Size (bytes)501,949,44068,840,640
Size478.7 MB 65.7 MB
Events in quadrant A5,934,018403,683
Events in quadrant B2,664,673448,568
Events in quadrant C3,253,871441,569
Events in quadrant D2,992,079422,419

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0310
B0310
C0310
D0310

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0211094
B0113522
C0128862
D0125322

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01080
B01080
C01080
D01080

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A5253151628.859699%
B5253691.313535%
C52531422.703217%
D52531342.550923%

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 7227 5255 1391 1391 19.25% 26.47%
B 7227 5255 36 36 0.50% 0.69%
C 7227 5255 125 125 1.73% 2.38%
D 7227 5255 128 128 1.77% 2.44%

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 3882584 38467.6 499 487 100.9
A 10 83 117434 1158.82 499 487 100.9
A 13 254 6251 57.12 499 487 100.9
B 5 236 123979 1083.96 595 579 113.8
B 5 172 123290 1077.9 595 579 113.8
B 4 232 36742 317.66 595 579 113.8
C 0 10 325074 2439.05 577 582 133.0
C 15 214 217562 1630.93 577 582 133.0
C 0 207 216780 1625.06 577 582 133.0
D 7 80 356145 2552.48 578 562 139.3
D 8 195 106441 760.03 578 562 139.3
D 7 223 73516 523.69 578 562 139.3

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