ASTROSAT CZTI

Data Quality Report

Orbit 20160131_G02_021T07_9000000306_level2

Creation date: 2025-10-27T11:48:39.748598
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/AS1G02_021T07_9000000306cztM0_level2.fits modeM0/AS1G02_021T07_9000000306cztM0_level2_quad_clean.evt
Size (bytes)192,047,040208,969,920
Size183.2 MB 199.3 MB
Events in quadrant A1,102,7941,236,041
Events in quadrant B1,096,6441,244,197
Events in quadrant C1,092,0021,183,231
Events in quadrant D944,6001,085,108

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A1139865888335912139865609994286
B1139865888335912139865609994286
C1139865888335912139865609994286
D1139865888335912139865609994286

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A05140
B04970
C05560
D05020

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01048650
B01053750
C01009490
D0969590

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A228113761.648328%
B228114071.784227%
C228093921.718620%
D228113631.591338%

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 72582 22811 0 0 0.00% 0.00%
B 72582 22811 0 0 0.00% 0.00%
C 72582 22810 0 0 0.00% 0.00%
D 72582 22812 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 1054 11.3 285 267 69.6
A 7 110 894 9.0 285 267 69.6
A 0 30 828 8.06 285 267 69.6
B 2 9 874 10.99 290 276 54.4
B 5 128 714 8.05 290 276 54.4
B 2 8 709 7.95 290 276 54.4
C 12 241 756 6.82 288 267 71.7
C 9 242 737 6.56 288 267 71.7
C 3 126 722 6.35 288 267 71.7
D 3 30 701 7.09 269 246 64.1
D 6 44 698 7.05 269 246 64.1
D 3 14 690 6.92 269 246 64.1

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