ASTROSAT CZTI

Data Quality Report

Orbit 51838

Creation date: 2025-04-29T01:45:46.197135
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_51838cztM0_level2.fits modeM0/AS1C09_011T05_9000006466_51838cztM0_level2_quad_clean.evt
Size (bytes)1,840,806,720228,864,960
Size1.7 GB 218.3 MB
Events in quadrant A12,601,6991,566,239
Events in quadrant B14,051,8611,675,753
Events in quadrant C16,059,1251,380,163
Events in quadrant D24,054,2401,076,829

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03640
B03640
C03640
D03640

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0497653
B0540173
C0601143
D0837954

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0150
B0150
C0150
D0150

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A178268394.706608%
B1782711126.237729%
C17827200111.224547%
D17826520729.210142%

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 19356 17829 554 554 2.86% 3.11%
B 19357 17830 780 780 4.03% 4.37%
C 19357 17829 1528 1528 7.89% 8.57%
D 19356 17828 4432 4432 22.90% 24.86%

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 11 3 1279124 2815.87 1840 1800 453.6
A 12 3 712990 1567.82 1840 1800 453.6
A 13 248 575462 1264.64 1840 1800 453.6
B 10 128 1543105 4001.44 1826 1759 385.2
B 5 32 1352894 3507.64 1826 1759 385.2
B 1 255 701494 1816.56 1826 1759 385.2
C 14 245 1211344 2496.49 1749 1738 484.5
C 15 192 1174801 2421.07 1749 1738 484.5
C 15 147 1141599 2352.55 1749 1738 484.5
D 11 129 6354538 14378.95 1564 1504 441.8
D 12 6 4682830 10595.34 1564 1504 441.8
D 8 176 2418834 5471.19 1564 1504 441.8

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