ASTROSAT CZTI

Data Quality Report

Orbit 35270

Creation date: 2022-04-07T06:18:32.360451
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_082T01_9000005056_35270cztM0_level2.evt modeM0/AS1A11_082T01_9000005056_35270cztM0_level2_quad_clean.evt
Size (bytes)931,112,640143,046,720
Size888.0 MB 136.4 MB
Events in quadrant A4,258,855981,298
Events in quadrant B8,378,170928,502
Events in quadrant C5,134,027952,537
Events in quadrant D9,827,456851,396

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0185753
B0309542
C0206442
D0353102

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01820
B01820
C01820
D01820

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0260
B0260
C0260
D0260

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A8900270.303371%
B8900120513.539326%
C89001491.674157%
D8900149116.752809%

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 11527 8902 16 16 0.14% 0.18%
B 11527 8902 827 827 7.17% 9.29%
C 11527 8902 118 118 1.02% 1.33%
D 11527 8902 1451 1451 12.59% 16.30%

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 9 143 170840 832.32 1016 994 204.1
A 10 83 121981 592.89 1016 994 204.1
A 13 6 17321 80.01 1016 994 204.1
B 5 236 3528405 19047.02 962 935 185.2
B 5 172 866360 4672.97 962 935 185.2
B 4 232 130348 698.78 962 935 185.2
C 0 10 584939 2549.88 987 995 229.0
C 15 214 366126 1594.4 987 995 229.0
C 15 208 172324 748.13 987 995 229.0
D 12 227 3169156 13962.7 932 907 226.9
D 2 249 1653885 7284.79 932 907 226.9
D 10 118 484258 2130.16 932 907 226.9

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