ASTROSAT CZTI

Data Quality Report

Orbit 20180801_A04_049T01_9000002266_level2

Creation date: 2025-11-23T19:52:53.065984
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/AS1A04_049T01_9000002266cztM0_level2.fits modeM0/AS1A04_049T01_9000002266cztM0_level2_quad_clean.evt
Size (bytes)160,404,480179,910,720
Size153.0 MB 171.6 MB
Events in quadrant A973,0301,113,865
Events in quadrant B931,4321,110,961
Events in quadrant C940,2361,052,676
Events in quadrant D830,252987,900

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03500
B03500
C03500
D03500

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0365310
B0370100
C0494170
D0387880

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0280
B0280
C0280
D0280

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A171532031.183466%
B171532051.195126%
C171534812.804174%
D171533201.865563%

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 19928 17152 0 0 0.00% 0.00%
B 19928 17152 0 0 0.00% 0.00%
C 19928 17150 0 0 0.00% 0.00%
D 19928 17147 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 29 955 11.15 253 238 64.3
A 7 110 827 9.16 253 238 64.3
A 0 30 757 8.07 253 238 64.3
B 2 9 752 10.24 246 235 50.5
B 2 8 633 7.88 246 235 50.5
B 5 225 630 7.82 246 235 50.5
C 2 191 647 6.24 248 232 66.5
C 3 126 638 6.11 248 232 66.5
C 9 233 635 6.06 248 232 66.5
D 10 189 633 6.47 237 215 64.6
D 7 3 601 5.97 237 215 64.6
D 10 113 595 5.88 237 215 64.6

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