ASTROSAT CZTI

Data Quality Report

Orbit 51857

Creation date: 2025-04-30T10:33:10.497971
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_51857cztM0_level2.fits modeM0/AS1C09_011T05_9000006466_51857cztM0_level2_quad_clean.evt
Size (bytes)650,949,12093,496,320
Size620.8 MB 89.2 MB
Events in quadrant A5,917,262615,622
Events in quadrant B4,248,194705,665
Events in quadrant C3,498,583638,722
Events in quadrant D9,908,167399,651

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01380
B01380
C01380
D01380

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0223192
B0172312
C0153782
D0341593

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0170
B0180
C0180
D0180

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A67564436.557134%
B67561452.146240%
C6756911.346951%
D6755249236.891192%

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 7912 6758 334 334 4.22% 4.94%
B 7912 6758 75 75 0.95% 1.11%
C 7912 6758 58 58 0.73% 0.86%
D 7911 6756 2389 2389 30.20% 35.36%

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 0 228 920214 5262.85 692 676 174.7
A 12 3 913224 5222.84 692 676 174.7
A 5 240 325967 1861.76 692 676 174.7
B 10 44 206287 1381.8 708 684 148.8
B 0 171 156855 1049.58 708 684 148.8
B 4 81 146288 978.57 708 684 148.8
C 13 3 279392 1446.79 698 691 192.6
C 15 224 103087 531.56 698 691 192.6
C 10 22 72486 372.7 698 691 192.6
D 11 129 6647421 43923.74 535 515 151.3
D 3 12 240462 1585.61 535 515 151.3
D 7 96 208292 1373.02 535 515 151.3

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