ASTROSAT CZTI

Data Quality Report

Orbit 20180219_G08_035T01_9000001904_level2

Creation date: 2025-11-19T15:10:02.452434
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/AS1G08_035T01_9000001904cztM0_level2.fits modeM0/AS1G08_035T01_9000001904cztM0_level2_quad_clean.evt
Size (bytes)185,595,840185,040,000
Size177.0 MB 176.5 MB
Events in quadrant A1,121,8641,116,735
Events in quadrant B1,015,5941,043,372
Events in quadrant C1,123,8461,068,353
Events in quadrant D969,626986,920

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0473840
B0552680
C0425920
D0501220

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0110
C0110
D0110

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04100
B04100
C04100
D04100

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A201528994.461096%
B20152252412.524811%
C201524292.128821%
D201526133.041882%

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 21322 20150 0 0 0.00% 0.00%
B 21322 19849 0 0 0.00% 0.00%
C 21322 20152 0 0 0.00% 0.00%
D 21322 20146 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 1134 11.7 290 270 73.9
A 14 188 1105 11.3 290 270 73.9
A 14 204 933 8.97 290 270 73.9
B 2 9 884 11.01 268 253 57.3
B 3 17 716 8.08 268 253 57.3
B 14 254 687 7.57 268 253 57.3
C 2 191 794 6.62 297 274 78.5
C 12 241 791 6.59 297 274 78.5
C 7 111 758 6.16 297 274 78.5
D 7 5 709 6.05 276 250 75.9
D 1 19 686 5.75 276 250 75.9
D 7 3 669 5.52 276 250 75.9

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