ASTROSAT CZTI

Data Quality Report

Orbit 53741

Creation date: 2025-09-04T04:54:26.042245
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/AS1A14_022T04_9000006506_53741cztM0_level2.fits modeM0/AS1A14_022T04_9000006506_53741cztM0_level2_quad_clean.evt
Size (bytes)2,215,402,560135,069,120
Size2.1 GB 128.8 MB
Events in quadrant A35,894,27771,284
Events in quadrant B6,394,7781,369,265
Events in quadrant C26,500,902592,119
Events in quadrant D12,138,1111,088,628

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01163393
B0296863
C0883223
D0461234

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02840
B02840
C02840
D02840

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0190
B0190
C0190
D0190

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A140161338295.476598%
B140171140.813298%
C14017776255.375615%
D1401612839.153824%

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 15805 14015 13089 13089 82.82% 93.39%
B 15807 14020 22 22 0.14% 0.16%
C 15806 14017 7105 7105 44.95% 50.69%
D 15806 14019 1077 1077 6.81% 7.68%

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 3 63 29859366 196000.04 611 597 152.3
A 3 78 3081921 20226.54 611 597 152.3
A 8 249 155156 1014.56 611 597 152.3
B 2 136 139643 449.19 1447 1391 307.8
B 5 185 123534 396.85 1447 1391 307.8
B 0 213 91311 292.15 1447 1391 307.8
C 1 241 12762668 47185.8 989 982 270.5
C 15 224 7093239 26223.32 989 982 270.5
C 13 3 746400 2756.15 989 982 270.5
D 1 241 2467323 6329.68 1377 1319 389.6
D 2 172 1670811 4285.21 1377 1319 389.6
D 3 12 536234 1373.01 1377 1319 389.6

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