ASTROSAT CZTI

Data Quality Report

Orbit 55752

Creation date: 2026-01-17T12:20:54.016440
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_55752cztM0_level2.fits modeM0/AS1A14_099T04_9000006540_55752cztM0_level2_quad_clean.evt
Size (bytes)655,211,52080,110,080
Size624.9 MB 76.4 MB
Events in quadrant A11,709,741289,084
Events in quadrant B5,744,442570,565
Events in quadrant C3,033,763588,975
Events in quadrant D3,284,515544,441

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0390471
B0212971
C0136061
D0143921

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0110
C0110
D0110

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01260
B01260
C01260
D01260

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6195348856.303471%
B619698715.929632%
C6196701.129761%
D61961402.259522%

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 7310 6196 3184 3184 43.56% 51.39%
B 7311 6196 600 600 8.21% 9.68%
C 7311 6197 23 23 0.31% 0.37%
D 7311 6197 82 82 1.12% 1.32%

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 6564286 51420.73 514 499 127.6
A 15 32 2333924 18280.06 514 499 127.6
A 7 64 513237 4016.79 514 499 127.6
B 2 249 3080423 23130.79 624 603 133.1
B 7 0 99741 744.57 624 603 133.1
B 5 172 24702 180.99 624 603 133.1
C 12 252 215811 1188.99 654 647 181.0
C 6 223 83315 456.82 654 647 181.0
C 13 3 80806 442.96 654 647 181.0
D 11 129 617442 3379.88 646 618 182.5
D 7 129 41605 224.59 646 618 182.5
D 3 12 39636 213.8 646 618 182.5

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