ASTROSAT CZTI

Data Quality Report

Orbit 20170514_A03_135T01_9000001226_level2

Creation date: 2026-03-11T12:02:57.266010
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/AS1A03_135T01_9000001226cztM0_level2.fits modeM0/AS1A03_135T01_9000001226cztM0_level2_quad_clean.evt
Size (bytes)1,354,043,5201,296,325,440
Size1.3 GB 1.2 GB
Events in quadrant A8,304,3787,819,972
Events in quadrant B7,957,6927,733,808
Events in quadrant C8,115,0507,383,361
Events in quadrant D6,793,9546,491,833

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A029380
B029380
C029360
D029280

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03386790
B03173080
C02955280
D03994630

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02180
B02180
C02170
D02180

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A14341826871.873544%
B14346029002.021469%
C14344710020.698516%
D143429104907.313723%

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 173848 143855 0 0 0.00% 0.00%
B 173848 143820 0 0 0.00% 0.00%
C 173848 143877 0 0 0.00% 0.00%
D 173848 143282 0 0 0.00% 0.00%

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 29 7980 11.06 2157 2013 539.7
A 7 110 6928 9.11 2157 2013 539.7
A 9 19 6118 7.61 2157 2013 539.7
B 2 9 6866 11.77 2096 1993 414.2
B 3 17 5336 8.07 2096 1993 414.2
B 14 254 5299 7.98 2096 1993 414.2
C 1 80 5966 7.06 2144 1983 563.8
C 1 81 5924 6.99 2144 1983 563.8
C 12 241 5648 6.5 2144 1983 563.8
D 6 231 4996 6.26 1939 1765 516.1
D 3 14 4870 6.02 1939 1765 516.1
D 1 19 4822 5.92 1939 1765 516.1

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