ASTROSAT CZTI

Data Quality Report

Orbit 55028

Creation date: 2025-12-01T13:34:30.260751
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_025T01_9000006530_55028cztM0_level2.fits modeM0/AS1A14_025T01_9000006530_55028cztM0_level2_quad_clean.evt
Size (bytes)833,837,76074,522,880
Size795.2 MB 71.1 MB
Events in quadrant A8,137,078457,626
Events in quadrant B3,662,144688,071
Events in quadrant C3,506,107617,193
Events in quadrant D15,011,9222,789

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A029166145
B01601456
C01561297
D049863455

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01420
B01420
C01420
D01420

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7046240834.175419%
B70574446.291625%
C70442884.088586%
D7014698999.643570%

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 7085 7073 1630 1630 23.01% 23.05%
B 7085 7073 73 73 1.03% 1.03%
C 7086 7066 16 16 0.23% 0.23%
D 7086 7034 4303 4303 60.73% 61.17%

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 5498628 34585.24 651 634 159.0
A 3 45 20323 123.85 651 634 159.0
A 0 8 19710 120.0 651 634 159.0
B 5 236 375373 2203.46 778 748 170.0
B 5 185 75253 438.22 778 748 170.0
B 10 245 51153 296.47 778 748 170.0
C 1 16 194246 895.33 785 776 216.1
C 6 223 116562 535.83 785 776 216.1
C 12 252 64597 295.34 785 776 216.1
D 15 94 9704362 185193.38 177 167 52.4
D 15 93 1466713 27987.34 177 167 52.4
D 11 129 1168527 22296.8 177 167 52.4

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