ASTROSAT CZTI

Data Quality Report

Orbit 56204

Creation date: 2026-02-16T22:14:35.629462
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_56204cztM0_level2.fits modeM0/AS1A14_083T04_9000006550_56204cztM0_level2_quad_clean.evt
Size (bytes)735,315,84080,352,000
Size701.3 MB 76.6 MB
Events in quadrant A9,460,290402,088
Events in quadrant B7,186,037497,358
Events in quadrant C3,245,739594,455
Events in quadrant D6,825,502487,725

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01300
B01300
C01300
D01300

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A080
B080
C080
D080

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0324871
B0258971
C0145761
D0247011

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6470241837.372488%
B6470174126.908810%
C6471691.066296%
D647188313.645495%

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 7279 6470 2236 2236 30.72% 34.56%
B 7280 6470 1267 1267 17.40% 19.58%
C 7281 6472 54 54 0.74% 0.83%
D 7281 6471 843 843 11.58% 13.03%

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 4277596 30989.92 552 539 138.0
A 8 176 1294655 9376.67 552 539 138.0
A 15 32 866713 6275.97 552 539 138.0
B 4 171 4316229 33932.28 596 575 127.2
B 5 185 229491 1799.88 596 575 127.2
B 0 231 57689 449.06 596 575 127.2
C 12 252 409141 2237.18 662 655 182.6
C 12 254 91648 498.35 662 655 182.6
C 6 223 48889 264.17 662 655 182.6
D 11 129 3071470 16978.46 629 600 180.9
D 6 239 380822 2102.2 629 600 180.9
D 13 153 205857 1134.84 629 600 180.9

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