ASTROSAT CZTI

Data Quality Report

Orbit 55529

Creation date: 2026-01-21T19:04:48.606225
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_099T01_9000006536_55529cztM0_level2.fits modeM0/AS1A14_099T01_9000006536_55529cztM0_level2_quad_clean.evt
Size (bytes)502,873,920104,607,360
Size479.6 MB 99.8 MB
Events in quadrant A3,668,730688,270
Events in quadrant B3,506,969743,986
Events in quadrant C4,138,921660,789
Events in quadrant D6,719,194554,069

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0170
B0170
C0170
D0170

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01540
B01540
C01540
D01540

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0164852
B0160152
C0176742
D0254482

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A74751101.471572%
B7476931.243981%
C7476931.243981%
D7476100713.469770%

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 9185 7477 60 60 0.65% 0.80%
B 9186 7478 21 21 0.23% 0.28%
C 9186 7478 67 67 0.73% 0.90%
D 9186 7478 864 864 9.41% 11.55%

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 4 205 401271 2043.55 786 765 196.0
A 4 159 48148 241.77 786 765 196.0
A 0 8 46521 233.47 786 765 196.0
B 10 245 93742 556.72 779 751 167.0
B 4 169 65855 389.76 779 751 167.0
B 0 171 51894 306.18 779 751 167.0
C 9 38 583988 2777.55 765 757 210.0
C 13 3 188984 896.4 765 757 210.0
C 15 178 179900 853.14 765 757 210.0
D 11 129 1051083 5218.92 708 678 201.3
D 7 70 697687 3463.07 708 678 201.3
D 8 160 530172 2630.78 708 678 201.3

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