ASTROSAT CZTI

Data Quality Report

Orbit 53851

Creation date: 2025-09-12T10:57:35.214691
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_057T04_9000006508_53851cztM0_level2.fits modeM0/AS1A14_057T04_9000006508_53851cztM0_level2_quad_clean.evt
Size (bytes)571,400,64064,330,560
Size544.9 MB 61.4 MB
Events in quadrant A2,901,665497,304
Events in quadrant B3,267,503509,830
Events in quadrant C7,489,454295,636
Events in quadrant D7,088,193282,309

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A012754583
B014341954
C0296513938
D0287994298

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01028
B01026
C01026
D01024

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A020
B020
C020
D020

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A53782013.737449%
B53253747.023474%
C5072197939.018139%
D5027188237.437836%

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 7504 5671 14 14 0.19% 0.25%
B 7504 5631 124 124 1.65% 2.20%
C 7504 5273 1840 1840 24.52% 34.89%
D 7505 5214 1763 1763 23.49% 33.81%

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 8 249 268955 1811.57 603 587 148.1
A 0 8 64417 430.87 603 587 148.1
A 3 62 60732 406.0 603 587 148.1
B 0 213 559549 4424.09 584 563 126.4
B 5 185 132573 1044.79 584 563 126.4
B 0 171 91170 717.11 584 563 126.4
C 1 241 3671631 29546.6 452 447 124.3
C 15 224 1874228 15080.65 452 447 124.3
C 12 2 39545 314.67 452 447 124.3
D 15 93 3499487 27888.97 443 423 125.5
D 13 153 746997 5950.5 443 423 125.5
D 10 172 665195 5298.5 443 423 125.5

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