ASTROSAT CZTI

Data Quality Report

Orbit 57176

Creation date: 2026-04-23T06:50:39.590268
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_070T08_9000006568_57176cztM0_level2.fits modeM0/AS1A14_070T08_9000006568_57176cztM0_level2_quad_clean.evt
Size (bytes)538,836,48084,755,520
Size513.9 MB 80.8 MB
Events in quadrant A3,321,767596,500
Events in quadrant B3,309,891636,030
Events in quadrant C8,926,091369,647
Events in quadrant D3,882,846510,717

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0230
B0230
C0230
D0230

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01340
B01340
C01340
D01340

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0145092
B0145532
C0309642
D0156253

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6500861.323077%
B65011842.830334%
C6501226034.763882%
D6500951.461538%

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 9157 6780 37 37 0.40% 0.55%
B 9158 6781 93 93 1.02% 1.37%
C 9158 6643 1977 1977 21.59% 29.76%
D 9157 6780 67 67 0.73% 0.99%

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 14 556251 3210.35 697 679 173.1
A 13 248 18537 103.19 697 679 173.1
A 10 251 13338 73.15 697 679 173.1
B 10 16 364033 2503.93 687 662 145.1
B 2 249 63408 432.37 687 662 145.1
B 5 185 36029 243.71 687 662 145.1
C 15 224 6619124 44152.24 547 542 149.9
C 14 67 41694 274.52 547 542 149.9
C 14 254 39979 263.08 547 542 149.9
D 5 113 428115 2244.99 667 633 190.4
D 12 33 155902 815.42 667 633 190.4
D 8 240 141743 741.06 667 633 190.4

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