ASTROSAT CZTI

Data Quality Report

Orbit 56200

Creation date: 2026-02-16T15:13:52.188308
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_56200cztM0_level2.fits modeM0/AS1A14_083T04_9000006550_56200cztM0_level2_quad_clean.evt
Size (bytes)645,675,84092,298,240
Size615.8 MB 88.0 MB
Events in quadrant A7,755,212547,621
Events in quadrant B3,432,544698,417
Events in quadrant C5,914,869558,099
Events in quadrant D6,289,622532,875

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01340
B01340
C01340
D01340

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0130
B0140
C0140
D0140

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0274912
B0145792
C0222934
D0231172

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6560139921.326220%
B65601912.911585%
C655998014.941302%
D655985613.050770%

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 7625 6560 1080 1080 14.16% 16.46%
B 7625 6560 20 20 0.26% 0.30%
C 7623 6558 699 699 9.17% 10.66%
D 7624 6559 676 676 8.87% 10.31%

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 3521220 20621.6 685 668 170.7
A 8 176 519050 3036.42 685 668 170.7
A 7 64 324996 1899.75 685 668 170.7
B 5 185 276568 1784.94 723 697 154.6
B 0 63 87761 563.32 723 697 154.6
B 4 21 32583 206.31 723 697 154.6
C 12 254 2389462 12994.78 676 671 183.8
C 12 252 691599 3758.58 676 671 183.8
C 1 12 85104 459.31 676 671 183.8
D 11 129 3056763 15736.62 688 657 194.2
D 2 249 169579 869.82 688 657 194.2
D 3 176 116802 598.06 688 657 194.2

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