ASTROSAT CZTI

Data Quality Report

Orbit 20170127_A02_111T01_9000000986_level2

Creation date: 2025-11-09T06:55:36.863679
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/AS1A02_111T01_9000000986cztM0_level2.fits modeM0/AS1A02_111T01_9000000986cztM0_level2_quad_clean.evt
Size (bytes)240,145,920238,144,320
Size229.0 MB 227.1 MB
Events in quadrant A1,443,2361,430,154
Events in quadrant B1,412,8681,447,559
Events in quadrant C1,433,4821,353,653
Events in quadrant D1,212,0781,209,065

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A05260
B05260
C05260
D05260

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0546130
B0560800
C0531350
D0626980

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0680
B0680
C0680
D0680

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A257561810.702749%
B257562791.083243%
C25756870.337785%
D257567492.908060%

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 32471 25753 0 0 0.00% 0.00%
B 32471 25752 0 0 0.00% 0.00%
C 32471 25753 0 0 0.00% 0.00%
D 32471 25743 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 0 29 1436 11.1 375 351 97.8
A 7 110 1205 8.74 375 351 97.8
A 0 30 1126 7.93 375 351 97.8
B 2 9 1211 11.24 371 354 76.2
B 12 226 1027 8.83 371 354 76.2
B 5 128 965 8.01 371 354 76.2
C 1 80 1062 7.06 378 352 100.6
C 12 241 1061 7.05 378 352 100.6
C 1 81 1041 6.85 378 352 100.6
D 6 231 918 6.37 346 314 94.8
D 3 14 896 6.14 346 314 94.8
D 7 5 854 5.7 346 314 94.8

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