ASTROSAT CZTI

Data Quality Report

Orbit 55690

Creation date: 2026-01-14T12:07:53.828684
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_55690cztM0_level2.fits modeM0/AS1A14_099T04_9000006540_55690cztM0_level2_quad_clean.evt
Size (bytes)567,037,44094,844,160
Size540.8 MB 90.5 MB
Events in quadrant A7,195,740539,293
Events in quadrant B4,019,192681,940
Events in quadrant C4,240,818606,943
Events in quadrant D4,999,112563,124

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0261532
B0167022
C0173954
D0199192

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0180
B0180
C0180
D0180

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01420
B01420
C01420
D01420

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6894124618.073687%
B68941271.842182%
C68942543.684363%
D68943865.599072%

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 8759 6895 1255 1255 14.33% 18.20%
B 8759 6896 59 59 0.67% 0.86%
C 8759 6896 216 216 2.47% 3.13%
D 8759 6896 362 362 4.13% 5.25%

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 12 115 3866142 23223.39 675 656 166.4
A 0 8 315044 1888.8 675 656 166.4
A 3 95 129034 771.28 675 656 166.4
B 4 206 462288 3024.5 710 686 152.6
B 5 236 417432 2730.59 710 686 152.6
B 0 143 113868 741.59 710 686 152.6
C 15 147 834554 4279.66 701 693 194.8
C 9 38 460672 2360.77 701 693 194.8
C 10 19 60903 309.02 701 693 194.8
D 11 129 1186924 6022.18 688 656 197.0
D 10 181 508134 2576.25 688 656 197.0
D 8 245 297617 1507.54 688 656 197.0

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