ASTROSAT CZTI

Data Quality Report

Orbit 55840

Creation date: 2026-01-23T10:42:31.299561
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_127T10_9000006542_55840cztM0_level2.fits modeM0/AS1A14_127T10_9000006542_55840cztM0_level2_quad_clean.evt
Size (bytes)518,768,64095,808,960
Size494.7 MB 91.4 MB
Events in quadrant A7,063,355565,118
Events in quadrant B3,161,114685,698
Events in quadrant C3,018,106622,256
Events in quadrant D5,435,098556,174

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0256722
B0143812
C0143892
D0209062

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0120
B0130
C0130
D0130

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01380
B01380
C01380
D01380

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A676885512.632979%
B67681502.216312%
C6768871.285461%
D67684396.486407%

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 7763 6768 740 740 9.53% 10.93%
B 7763 6768 14 14 0.18% 0.21%
C 7763 6768 17 17 0.22% 0.25%
D 7763 6769 384 384 4.95% 5.67%

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 12 115 3163758 18636.83 696 678 169.7
A 3 14 490133 2883.86 696 678 169.7
A 8 192 244198 1434.82 696 678 169.7
B 7 252 105659 663.33 725 698 158.2
B 0 213 77221 483.61 725 698 158.2
B 0 197 62842 392.73 725 698 158.2
C 6 223 50979 255.09 719 713 197.1
C 12 250 28929 143.19 719 713 197.1
C 12 252 27867 137.8 719 713 197.1
D 11 129 2065006 10431.02 694 662 197.9
D 3 12 263545 1328.33 694 662 197.9
D 15 125 99867 501.28 694 662 197.9

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