ASTROSAT CZTI

Data Quality Report

Orbit 20180411_T02_041T01_9000002032_level2

Creation date: 2025-11-21T16:25:59.250456
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/AS1T02_041T01_9000002032cztM0_level2.fits modeM0/AS1T02_041T01_9000002032cztM0_level2_quad_clean.evt
Size (bytes)664,067,520896,204,160
Size633.3 MB 854.7 MB
Events in quadrant A4,028,2245,707,824
Events in quadrant B3,880,3245,806,817
Events in quadrant C3,952,7245,627,697
Events in quadrant D3,439,4425,192,677

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01435210
B01499750
C01498080
D01554930

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A014280
B014280
C014280
D014280

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01090
B01090
C01090
D01090

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A701636230.887932%
B701639241.316933%
C701639591.366817%
D701639321.328335%

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 80893 70164 0 0 0.00% 0.00%
B 80893 70163 0 0 0.00% 0.00%
C 80893 70159 0 0 0.00% 0.00%
D 80893 70160 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 3859 10.81 1047 980 266.3
A 7 110 3141 8.12 1047 980 266.3
A 0 30 2928 7.32 1047 980 266.3
B 2 9 3555 12.82 1024 978 201.0
B 14 254 2645 8.29 1024 978 201.0
B 2 8 2621 8.17 1024 978 201.0
C 1 81 3012 7.55 1043 975 269.8
C 1 80 2930 7.24 1043 975 269.8
C 9 233 2709 6.42 1043 975 269.8
D 6 231 2579 6.39 980 890 264.1
D 6 67 2526 6.19 980 890 264.1
D 3 14 2495 6.08 980 890 264.1

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