ASTROSAT CZTI

Data Quality Report

Orbit 56176

Creation date: 2026-02-15T01:10:27.792479
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_56176cztM0_level2.fits modeM0/AS1A14_083T04_9000006550_56176cztM0_level2_quad_clean.evt
Size (bytes)629,418,24086,135,040
Size600.3 MB 82.1 MB
Events in quadrant A10,261,367408,861
Events in quadrant B4,402,932637,944
Events in quadrant C4,230,276547,209
Events in quadrant D3,889,702551,193

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01360
B01360
C01360
D01360

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A020
B020
C020
D020

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0349612
B0176641
C0176981
D0164461

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6629261739.478051%
B66294316.501735%
C66305668.536953%
D66301502.262443%

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 6879 6631 2274 2274 33.06% 34.29%
B 6879 6631 198 198 2.88% 2.99%
C 6880 6632 300 300 4.36% 4.52%
D 6880 6632 135 135 1.96% 2.04%

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 4596108 31363.46 589 574 146.5
A 7 64 1710616 11670.64 589 574 146.5
A 15 32 823744 5617.95 589 574 146.5
B 4 171 608104 4157.6 684 659 146.1
B 10 247 251406 1716.21 684 659 146.1
B 5 172 219012 1494.5 684 659 146.1
C 1 12 744355 4148.74 654 647 179.3
C 12 254 535107 2981.46 654 647 179.3
C 15 230 214862 1194.99 654 647 179.3
D 8 240 573738 3017.76 669 639 189.9
D 2 249 193968 1018.01 669 639 189.9
D 11 129 77877 406.71 669 639 189.9

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