ASTROSAT CZTI

Data Quality Report

Orbit 31737

Creation date: 2024-06-27T20:32:06.863635
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/AS1T04_034T01_9000004632_31737cztM0_level2.evt modeM0/AS1T04_034T01_9000004632_31737cztM0_level2_quad_clean.evt
Size (bytes)964,595,520111,496,320
Size919.9 MB 106.3 MB
Events in quadrant A6,976,803655,036
Events in quadrant B9,240,433688,843
Events in quadrant C5,666,066675,346
Events in quadrant D6,656,343664,920

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A050
B050
C050
D050

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02020
B02020
C02020
D02020

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0271911
B0349161
C0231881
D0264071

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A99838788.794951%
B99837137.142142%
C99842342.343750%
D99841021.021635%

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 10453 9984 588 588 5.63% 5.89%
B 10453 9984 328 328 3.14% 3.29%
C 10454 9985 86 86 0.82% 0.86%
D 10454 9985 70 70 0.67% 0.70%

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 2553609 10945.48 1144 1120 233.2
A 13 254 16238 64.83 1144 1120 233.2
A 3 137 11813 45.85 1144 1120 233.2
B 6 159 2601523 11792.33 1150 1123 220.5
B 5 255 1188600 5384.99 1150 1123 220.5
B 4 80 807630 3657.36 1150 1123 220.5
C 0 10 861945 3209.3 1138 1143 268.2
C 14 238 183243 678.92 1138 1143 268.2
C 10 22 88218 324.64 1138 1143 268.2
D 8 195 1965453 7262.98 1150 1121 270.5
D 12 233 301521 1110.71 1150 1121 270.5
D 2 234 43398 156.32 1150 1121 270.5

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