ASTROSAT CZTI

Data Quality Report

Orbit 55261

Creation date: 2025-12-15T11:10:00.211448
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_009T01_9000006534_55261cztM0_level2.fits modeM0/AS1A14_009T01_9000006534_55261cztM0_level2_quad_clean.evt
Size (bytes)505,224,000126,192,960
Size481.8 MB 120.3 MB
Events in quadrant A4,334,770809,599
Events in quadrant B4,078,173872,630
Events in quadrant C4,806,241785,031
Events in quadrant D4,799,755744,075

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01780
B01780
C01780
D01780

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0196222
B0189232
C0209332
D0207572

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A070
B070
C070
D070

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A87841381.571038%
B87841922.185792%
C87831902.163270%
D8784981.115665%

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 9479 8786 60 60 0.63% 0.68%
B 9479 8786 33 33 0.35% 0.38%
C 9478 8785 130 130 1.37% 1.48%
D 9479 8786 67 67 0.71% 0.76%

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 4 249 349142 1522.57 940 918 228.7
A 11 191 76371 329.91 940 918 228.7
A 0 8 69477 299.77 940 918 228.7
B 5 185 256514 1273.45 939 905 200.7
B 10 245 60110 294.96 939 905 200.7
B 0 182 25785 123.95 939 905 200.7
C 13 3 624252 2444.0 929 918 255.0
C 10 22 173264 675.74 929 918 255.0
C 12 252 111522 433.66 929 918 255.0
D 3 12 495302 1925.97 921 881 256.7
D 7 96 214595 832.5 921 881 256.7
D 2 207 107894 416.86 921 881 256.7

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