ASTROSAT CZTI

Data Quality Report

Orbit 20180406_G08_038T02_9000002020_level2

Creation date: 2025-11-21T13:55:46.180546
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/AS1G08_038T02_9000002020cztM0_level2.fits modeM0/AS1G08_038T02_9000002020cztM0_level2_quad_clean.evt
Size (bytes)233,925,120256,711,680
Size223.1 MB 244.8 MB
Events in quadrant A1,403,9501,476,043
Events in quadrant B1,344,7841,489,584
Events in quadrant C1,411,0021,623,661
Events in quadrant D1,194,5561,455,627

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A05160
B05160
C05160
D05160

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0200
B0200
C0200
D0200

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0517550
B0553320
C0523660
D0652650

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A251413651.451812%
B251415532.199594%
C251413421.360328%
D2514112735.063442%

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 27136 25142 0 0 0.00% 0.00%
B 27136 25142 0 0 0.00% 0.00%
C 27136 25141 0 0 0.00% 0.00%
D 27136 25137 0 0 0.00% 0.00%

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 14 188 1414 11.67 363 340 92.0
A 0 29 1337 10.83 363 340 92.0
A 14 204 1248 9.86 363 340 92.0
B 2 9 1190 11.76 353 335 72.7
B 3 17 923 8.09 353 335 72.7
B 5 232 902 7.8 353 335 72.7
C 1 80 1139 8.02 371 345 99.1
C 1 81 1122 7.84 371 345 99.1
C 12 250 1023 6.84 371 345 99.1
D 3 14 900 6.26 341 309 94.4
D 6 231 896 6.22 341 309 94.4
D 3 159 858 5.82 341 309 94.4

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