ASTROSAT CZTI

Data Quality Report

Orbit 57672

Creation date: 2026-05-26T16:10:03.858940
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_125T09_9000006578_57672cztM0_level2.fits modeM0/AS1A14_125T09_9000006578_57672cztM0_level2_quad_clean.evt
Size (bytes)441,385,92092,707,200
Size420.9 MB 88.4 MB
Events in quadrant A2,888,480608,938
Events in quadrant B4,174,615642,713
Events in quadrant C4,578,104575,940
Events in quadrant D4,203,560536,504

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A070
B070
C070
D070

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01280
B01280
C01280
D01280

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0130871
B0166891
C0180271
D0168821

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A63511131.779247%
B63513575.621162%
C63513185.007085%
D63513094.865376%

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 7066 6351 3 3 0.04% 0.05%
B 7066 6351 74 74 1.05% 1.17%
C 7066 6351 221 221 3.13% 3.48%
D 7066 6351 226 226 3.20% 3.56%

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 11 31 99870 582.91 695 674 170.2
A 4 95 38641 223.11 695 674 170.2
A 10 251 26367 150.98 695 674 170.2
B 4 80 1248349 8635.61 678 652 144.5
B 5 185 83817 575.6 678 652 144.5
B 0 213 31376 212.65 678 652 144.5
C 15 224 1223773 6734.91 668 659 181.6
C 9 38 242360 1330.89 668 659 181.6
C 12 252 201927 1108.25 668 659 181.6
D 8 240 776869 4125.47 670 638 188.2
D 8 160 321707 1706.4 670 638 188.2
D 2 120 97969 517.29 670 638 188.2

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