ASTROSAT CZTI

Data Quality Report

Orbit 55081

Creation date: 2025-12-03T08:47:24.470032
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_55081cztM0_level2.fits modeM0/AS1A14_025T01_9000006530_55081cztM0_level2_quad_clean.evt
Size (bytes)418,826,880107,092,800
Size399.4 MB 102.1 MB
Events in quadrant A3,159,381708,336
Events in quadrant B3,323,656765,043
Events in quadrant C3,206,001677,858
Events in quadrant D5,253,020589,427

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0148602
B0151752
C0150462
D0208272

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01480
B01480
C01480
D01480

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0220
B0220
C0220
D0220

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7213360.499099%
B7213921.275475%
C7213360.499099%
D72145067.014139%

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 9398 7214 13 13 0.14% 0.18%
B 9398 7214 14 14 0.15% 0.19%
C 9398 7214 18 18 0.19% 0.25%
D 9399 7215 504 504 5.36% 6.99%

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 49349 247.46 792 774 196.3
A 13 254 20184 98.88 792 774 196.3
A 4 3 15855 76.83 792 774 196.3
B 0 182 73210 426.75 785 757 169.8
B 10 247 42990 248.75 785 757 169.8
B 5 185 41789 241.68 785 757 169.8
C 13 3 73981 348.33 770 763 210.2
C 9 38 53143 249.2 770 763 210.2
C 12 252 29462 136.54 770 763 210.2
D 15 94 1415519 6810.89 733 701 207.7
D 2 249 160598 769.74 733 701 207.7
D 3 176 115528 552.77 733 701 207.7

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