ASTROSAT CZTI

Data Quality Report

Orbit 55709

Creation date: 2026-01-20T14:16:53.461924
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_099T04_9000006540_55709cztM0_level2.fits modeM0/AS1A14_099T04_9000006540_55709cztM0_level2_quad_clean.evt
Size (bytes)553,985,28090,060,480
Size528.3 MB 85.9 MB
Events in quadrant A9,497,659452,137
Events in quadrant B2,793,263663,822
Events in quadrant C3,413,957603,380
Events in quadrant D4,297,506554,113

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0326971
B0133831
C0148761
D0175331

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0100
B0100
C0100
D0100

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01340
B01340
C01340
D01340

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6495211232.517321%
B64961091.677956%
C6496651.000616%
D64962053.155788%

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 7519 6494 1848 1848 24.58% 28.46%
B 7521 6496 5 5 0.07% 0.08%
C 7521 6498 33 33 0.44% 0.51%
D 7521 6496 190 190 2.53% 2.92%

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 15 32 6224100 40858.24 614 597 152.3
A 8 206 337530 2212.02 614 597 152.3
A 0 8 291675 1910.97 614 597 152.3
B 10 247 24143 158.27 686 658 148.4
B 12 111 18431 119.77 686 658 148.4
B 9 251 17045 110.43 686 658 148.4
C 9 38 482922 2623.71 674 668 183.8
C 12 249 106489 575.72 674 668 183.8
C 14 96 68095 366.84 674 668 183.8
D 11 129 1243935 6610.27 667 638 188.1
D 10 181 259574 1376.69 667 638 188.1
D 8 245 91033 480.61 667 638 188.1

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