ASTROSAT CZTI

Data Quality Report

Orbit 55401

Creation date: 2025-12-24T21:10:31.892625
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_099T01_9000006536_55401cztM0_level2.fits modeM0/AS1A14_099T01_9000006536_55401cztM0_level2_quad_clean.evt
Size (bytes)451,601,28088,194,240
Size430.7 MB 84.1 MB
Events in quadrant A3,332,803605,859
Events in quadrant B2,809,508645,488
Events in quadrant C3,506,533543,627
Events in quadrant D6,591,562447,989

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0120
B0120
C0120
D0120

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01240
B01240
C01240
D01240

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0143031
B0129042
C0149401
D0238371

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A61231101.796505%
B6122821.339432%
C61233535.765148%
D6123115718.895966%

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 7242 6123 35 35 0.48% 0.57%
B 7241 6122 17 17 0.23% 0.28%
C 7243 6124 172 172 2.37% 2.81%
D 7243 6124 1162 1162 16.04% 18.97%

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 4 159 498956 3083.47 654 638 161.6
A 0 8 158823 978.81 654 638 161.6
A 5 242 66462 407.3 654 638 161.6
B 5 236 105381 771.56 642 619 135.8
B 5 185 76848 561.42 642 619 135.8
B 5 172 31933 230.62 642 619 135.8
C 13 3 877170 5201.69 613 606 168.5
C 12 249 95905 565.52 613 606 168.5
C 12 2 48379 283.49 613 606 168.5
D 8 160 2145929 13100.38 577 552 163.8
D 11 129 1614007 9852.29 577 552 163.8
D 2 249 228328 1390.88 577 552 163.8

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