ASTROSAT CZTI

Data Quality Report

Orbit 55721

Creation date: 2026-01-15T10:46:41.589740
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_55721cztM0_level2.fits modeM0/AS1A14_099T04_9000006540_55721cztM0_level2_quad_clean.evt
Size (bytes)817,467,84077,791,680
Size779.6 MB 74.2 MB
Events in quadrant A10,082,060414,860
Events in quadrant B3,164,231695,430
Events in quadrant C11,791,340218,475
Events in quadrant D4,713,159568,956

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0344732
B0141132
C0395182
D0187082

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0140
B0140
C0150
D0150

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01320
B01320
C01320
D01320

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6564265440.432663%
B6564711.081658%
C6564452968.997562%
D65643385.149299%

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 7714 6565 2269 2269 29.41% 34.56%
B 7714 6565 1 1 0.01% 0.02%
C 7714 6565 2928 2928 37.96% 44.60%
D 7714 6565 314 314 4.07% 4.78%

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 4833262 33424.45 587 574 144.6
A 12 115 2336142 16153.55 587 574 144.6
A 0 8 211826 1461.09 587 574 144.6
B 4 206 308514 2026.28 709 682 151.9
B 0 199 21473 136.86 709 682 151.9
B 12 111 18370 116.43 709 682 151.9
C 15 199 10114709 102917.41 354 350 98.3
C 15 177 132520 1344.88 354 350 98.3
C 9 38 57023 576.67 354 350 98.3
D 11 129 1458919 7576.83 679 649 192.5
D 8 245 319055 1654.36 679 649 192.5
D 14 49 103882 536.37 679 649 192.5

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