ASTROSAT CZTI

Data Quality Report

Orbit 55479

Creation date: 2025-12-30T13:05:33.182396
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_099T01_9000006536_55479cztM0_level2.fits modeM0/AS1A14_099T01_9000006536_55479cztM0_level2_quad_clean.evt
Size (bytes)511,395,840111,536,640
Size487.7 MB 106.4 MB
Events in quadrant A4,462,109725,532
Events in quadrant B3,886,584786,152
Events in quadrant C4,103,205695,936
Events in quadrant D5,875,654630,360

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A061
B061
C061
D061

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01562
B01562
C01562
D01562

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0188052
B0173551
C0178961
D0229734

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A77562373.055699%
B77561201.547189%
C77561311.689015%
D77565437.001031%

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 7756 7756 166 166 2.14% 2.14%
B 7756 7756 52 52 0.67% 0.67%
C 7756 7756 101 101 1.30% 1.30%
D 7756 7756 468 468 6.03% 6.03%

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 0 8 534436 2572.01 833 808 207.5
A 3 78 236120 1134.17 833 808 207.5
A 13 248 176636 847.47 833 808 207.5
B 5 236 251810 1422.82 831 801 176.4
B 7 252 73602 412.67 831 801 176.4
B 10 247 68141 381.71 831 801 176.4
C 9 38 484995 2163.52 820 811 223.8
C 13 3 186257 828.65 820 811 223.8
C 15 147 45347 199.0 820 811 223.8
D 11 129 1661983 7319.09 805 766 227.0
D 7 70 275675 1211.21 805 766 227.0
D 5 113 191690 841.18 805 766 227.0

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