ASTROSAT CZTI

Data Quality Report

Orbit 56231

Creation date: 2026-02-19T10:14:51.503696
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_56231cztM0_level2.fits modeM0/AS1A14_083T04_9000006550_56231cztM0_level2_quad_clean.evt
Size (bytes)767,810,88081,535,680
Size732.2 MB 77.8 MB
Events in quadrant A15,315,747129,660
Events in quadrant B4,005,631694,902
Events in quadrant C4,209,335619,091
Events in quadrant D4,386,597572,170

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01320
B01320
C01320
D01320

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0130
B0140
C0140
D0140

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0499022
B0163532
C0170142
D0175332

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6494553185.170927%
B64943044.681244%
C64943255.004620%
D64943755.774561%

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 7624 6495 5281 5281 69.27% 81.31%
B 7624 6495 75 75 0.98% 1.15%
C 7624 6495 214 214 2.81% 3.29%
D 7624 6495 250 250 3.28% 3.85%

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 8847643 82381.82 433 423 107.4
A 15 32 3067205 28556.66 433 423 107.4
A 8 176 1221721 11372.24 433 423 107.4
B 4 171 459972 3007.45 718 691 152.7
B 5 185 241627 1577.69 718 691 152.7
B 1 255 107313 698.18 718 691 152.7
C 15 198 949607 4965.21 704 696 191.1
C 6 223 169347 882.47 704 696 191.1
C 5 250 162194 845.04 704 696 191.1
D 2 249 633576 3182.9 702 668 198.8
D 8 129 257108 1289.64 702 668 198.8
D 7 96 219261 1099.31 702 668 198.8

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