ASTROSAT CZTI

Data Quality Report

Orbit 51871

Creation date: 2025-05-01T05:20:13.199385
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/AS1C09_011T05_9000006466_51871cztM0_level2.fits modeM0/AS1C09_011T05_9000006466_51871cztM0_level2_quad_clean.evt
Size (bytes)741,041,28081,455,040
Size706.7 MB 77.7 MB
Events in quadrant A4,859,500603,107
Events in quadrant B5,158,244612,319
Events in quadrant C4,478,310583,312
Events in quadrant D12,439,494221,537

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01300
B01300
C01300
D01300

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0190452
B0198302
C0178202
D0414216

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0130
B0140
C0140
D0140

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A63881712.676894%
B638867310.535379%
C63883315.181590%
D6387413764.772194%

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 7491 6392 125 125 1.67% 1.96%
B 7491 6392 520 520 6.94% 8.14%
C 7491 6392 256 256 3.42% 4.01%
D 7490 6391 3538 3538 47.24% 55.36%

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 3 1207572 7227.17 669 654 167.0
A 12 194 144624 862.11 669 654 167.0
A 4 3 116195 691.87 669 654 167.0
B 4 170 837100 6116.5 649 628 136.8
B 5 172 448055 3271.7 649 628 136.8
B 4 206 266470 1943.9 649 628 136.8
C 14 80 487842 2704.1 656 651 180.2
C 10 22 256178 1418.27 656 651 180.2
C 13 3 189658 1049.06 656 651 180.2
D 11 129 10261402 91694.44 399 386 111.9
D 2 249 204765 1826.37 399 386 111.9
D 8 176 69077 613.84 399 386 111.9

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