ASTROSAT CZTI

Data Quality Report

Orbit 55782

Creation date: 2026-01-19T18:01:21.353917
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_099T04_9000006540_55782cztM0_level2.fits modeM0/AS1A14_099T04_9000006540_55782cztM0_level2_quad_clean.evt
Size (bytes)608,656,32089,559,360
Size580.5 MB 85.4 MB
Events in quadrant A6,122,421599,459
Events in quadrant B3,241,770678,183
Events in quadrant C2,993,031621,085
Events in quadrant D9,657,072349,921

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0227652
B0139842
C0142012
D0332532

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0190
B0190
C0200
D0200

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01340
B01340
C01340
D01340

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A66455578.382242%
B66451321.986456%
C6645781.173815%
D6645274241.264108%

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 7640 6646 460 460 6.02% 6.92%
B 7639 6645 1 1 0.01% 0.02%
C 7639 6645 48 48 0.63% 0.72%
D 7639 6645 2381 2381 31.17% 35.83%

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 15 32 1641342 9541.11 700 681 172.0
A 7 64 702599 4081.94 700 681 172.0
A 12 115 411638 2389.88 700 681 172.0
B 5 172 374086 2431.99 712 685 153.5
B 12 111 18769 117.78 712 685 153.5
B 7 252 17805 111.5 712 685 153.5
C 12 250 163635 852.38 700 694 191.2
C 15 199 61904 320.2 700 694 191.2
C 6 223 18147 91.3 700 694 191.2
D 11 129 7244213 51464.51 493 471 140.8
D 8 245 175289 1242.03 493 471 140.8
D 2 249 76692 541.53 493 471 140.8

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