ASTROSAT CZTI

Data Quality Report

Orbit 52872

Creation date: 2025-07-16T11:45:12.901000
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/AS1C09_011T08_9000006482_52872cztM0_level2.fits modeM0/AS1C09_011T08_9000006482_52872cztM0_level2_quad_clean.evt
Size (bytes)925,513,92066,000,960
Size882.6 MB 62.9 MB
Events in quadrant A14,531,60516,946
Events in quadrant B7,028,056545,344
Events in quadrant C8,076,068417,740
Events in quadrant D4,159,947599,644

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0471593
B0250141
C0282261
D0166471

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0100
B0100
C0100
D0100

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01220
B01220
C01220
D01220

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A5993587498.014350%
B5993129021.525113%
C5993208634.807275%
D59931813.020190%

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 6982 5992 5385 5385 77.13% 89.87%
B 6983 5994 1016 1016 14.55% 16.95%
C 6983 5994 1917 1917 27.45% 31.98%
D 6983 5994 157 157 2.25% 2.62%

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 9 191 12978977 165544.69 291 284 78.4
A 15 174 80809 1027.11 291 284 78.4
A 0 8 76969 978.13 291 284 78.4
B 8 3 4007508 31221.13 595 576 128.3
B 4 81 218554 1698.44 595 576 128.3
B 8 128 124355 964.46 595 576 128.3
C 2 12 4899545 34526.81 495 490 141.9
C 4 5 530867 3737.91 495 490 141.9
C 7 80 326312 2296.28 495 490 141.9
D 8 176 545602 2848.05 638 610 191.4
D 2 120 284690 1484.56 638 610 191.4
D 2 153 191950 999.92 638 610 191.4

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