ASTROSAT CZTI

Data Quality Report

Orbit 57817

Creation date: 2026-06-05T10:43:28.917920
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_083T16_9000006580_57817cztM0_level2.fits modeM0/AS1A14_083T16_9000006580_57817cztM0_level2_quad_clean.evt
Size (bytes)553,815,36080,899,200
Size528.2 MB 77.2 MB
Events in quadrant A3,336,975558,874
Events in quadrant B2,923,941607,889
Events in quadrant C10,476,216335,542
Events in quadrant D3,251,408488,339

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01320
B01320
C01320
D01320

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0146411
B0136491
C0356541
D0145501

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0100
B0100
C0100
D0100

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6584911.382139%
B6585671.017464%
C6585266640.485953%
D6585530.804860%

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 7814 6860 63 63 0.81% 0.92%
B 7815 6861 7 7 0.09% 0.10%
C 7815 6837 2387 2387 30.54% 34.91%
D 7815 6861 27 27 0.35% 0.39%

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 14 512587 2972.53 687 669 172.2
A 3 128 98204 566.35 687 669 172.2
A 10 251 33254 189.21 687 669 172.2
B 7 252 37214 252.17 685 659 145.0
B 0 63 31759 214.54 685 659 145.0
B 4 142 28230 190.2 685 659 145.0
C 9 38 6332340 40867.58 573 568 154.9
C 15 224 1576536 10171.88 573 568 154.9
C 14 254 215643 1388.17 573 568 154.9
D 3 12 164293 869.65 665 635 188.2
D 2 153 128762 680.84 665 635 188.2
D 3 224 121100 640.13 665 635 188.2

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