ASTROSAT CZTI

Data Quality Report

Orbit 20190419_C04_001T01_9000002846_level2

Creation date: 2025-11-29T12:04:30.094037
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/AS1C04_001T01_9000002846cztM0_level2.fits modeM0/AS1C04_001T01_9000002846cztM0_level2_quad_clean.evt
Size (bytes)811,589,760800,112,960
Size774.0 MB 763.0 MB
Events in quadrant A4,959,3944,832,325
Events in quadrant B4,783,7964,877,096
Events in quadrant C4,921,2464,707,038
Events in quadrant D4,197,7204,100,292

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01450
B01450
C01450
D01450

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A016960
B016960
C016960
D016960

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01729710
B01768940
C01866820
D02199360

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A833798000.959474%
B8338411701.403147%
C8338014831.778604%
D8338153866.459505%

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 97649 83376 0 0 0.00% 0.00%
B 97649 83372 0 0 0.00% 0.00%
C 97649 83378 0 0 0.00% 0.00%
D 97649 83350 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 4563 10.55 1291 1214 317.5
A 7 110 3908 8.48 1291 1214 317.5
A 9 19 3727 7.91 1291 1214 317.5
B 2 9 3829 10.63 1266 1209 246.5
B 2 8 3240 8.24 1266 1209 246.5
B 5 128 3130 7.79 1266 1209 246.5
C 1 80 3704 7.47 1299 1219 332.5
C 1 81 3675 7.39 1299 1219 332.5
C 12 241 3413 6.6 1299 1219 332.5
D 10 190 3148 6.56 1197 1100 312.0
D 3 14 3070 6.31 1197 1100 312.0
D 15 46 3003 6.1 1197 1100 312.0

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