ASTROSAT CZTI

Data Quality Report

Orbit 56158

Creation date: 2026-02-13T19:27:01.819607
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_083T04_9000006550_56158cztM0_level2.fits modeM0/AS1A14_083T04_9000006550_56158cztM0_level2_quad_clean.evt
Size (bytes)601,470,72097,387,200
Size573.6 MB 92.9 MB
Events in quadrant A5,965,295625,165
Events in quadrant B4,787,182711,597
Events in quadrant C3,041,006655,288
Events in quadrant D7,946,596485,516

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01380
B01380
C01380
D01380

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0110
C0110
D0110

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0222104
B0189151
C0140431
D0283151

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A676078311.582840%
B67604005.917160%
C6760921.360947%
D6761152822.600207%

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 7885 6761 695 695 8.81% 10.28%
B 7885 6761 136 136 1.72% 2.01%
C 7885 6761 7 7 0.09% 0.10%
D 7886 6762 1344 1344 17.04% 19.88%

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 1836435 10275.33 728 712 178.7
A 0 8 499886 2794.09 728 712 178.7
A 3 14 292678 1634.26 728 712 178.7
B 5 172 881558 5641.74 733 706 156.1
B 5 185 586137 3749.6 733 706 156.1
B 10 247 120538 767.51 733 706 156.1
C 12 252 92154 459.69 730 721 198.9
C 6 223 36881 181.8 730 721 198.9
C 15 230 28080 137.55 730 721 198.9
D 8 240 2569223 13794.96 657 627 186.2
D 2 62 1311116 7038.14 657 627 186.2
D 11 129 458657 2459.91 657 627 186.2

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