ASTROSAT CZTI

Data Quality Report

Orbit 56854

Creation date: 2026-04-01T14:51:58.620353
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_083T03_9000006562_56854cztM0_level2.fits modeM0/AS1A14_083T03_9000006562_56854cztM0_level2_quad_clean.evt
Size (bytes)469,434,24085,222,080
Size447.7 MB 81.3 MB
Events in quadrant A3,342,500575,777
Events in quadrant B5,482,204539,851
Events in quadrant C3,041,861562,108
Events in quadrant D5,049,502488,979

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0110
C0110
D0110

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01200
B01200
C01200
D01200

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0142001
B0202371
C0132711
D0189401

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A59232444.119534%
B5923107918.217120%
C59241362.295746%
D592463110.651587%

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 7033 5923 164 164 2.33% 2.77%
B 7033 5923 824 824 11.72% 13.91%
C 7034 5924 68 68 0.97% 1.15%
D 7034 5925 575 575 8.17% 9.70%

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 62 593487 3708.1 649 632 159.9
A 3 14 98975 615.1 649 632 159.9
A 10 251 74269 460.57 649 632 159.9
B 5 185 2660823 21148.27 588 567 125.8
B 10 16 302811 2402.75 588 567 125.8
B 0 245 33948 265.37 588 567 125.8
C 14 246 186591 1082.1 634 629 171.9
C 8 208 145386 842.33 634 629 171.9
C 13 3 86315 498.6 634 629 171.9
D 2 249 1138963 6683.1 610 582 170.3
D 8 240 1027292 6027.51 610 582 170.3
D 5 113 337324 1976.91 610 582 170.3

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