ASTROSAT CZTI

Data Quality Report

Orbit 26820

Creation date: 2024-06-27T19:33:20.526908
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/AS1A09_145T01_9000003866_26820cztM0_level2.evt modeM0/AS1A09_145T01_9000003866_26820cztM0_level2_quad_clean.evt
Size (bytes)244,284,48043,718,400
Size233.0 MB 41.7 MB
Events in quadrant A1,734,338305,724
Events in quadrant B1,705,338306,790
Events in quadrant C1,281,566297,610
Events in quadrant D2,524,702252,888

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0130
B0130
C0130
D0130

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A067760
B065760
C051420
D090620

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A2221411.846015%
B22211798.059433%
C2221502.251238%
D222151823.322828%

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 3516 2222 6 6 0.17% 0.27%
B 3516 2222 123 123 3.50% 5.54%
C 3516 2222 3 3 0.09% 0.14%
D 3516 2222 333 333 9.47% 14.99%

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 13 501241 7689.04 319 314 65.1
A 13 254 3708 52.1 319 314 65.1
A 0 226 2735 37.16 319 314 65.1
B 10 246 401838 6682.41 314 308 60.1
B 0 189 50388 833.45 314 308 60.1
B 3 64 10838 175.24 314 308 60.1
C 14 238 52095 700.52 310 313 73.9
C 15 208 17697 235.17 310 313 73.9
C 2 16 2825 33.98 310 313 73.9
D 1 52 1021455 15459.09 273 268 66.1
D 7 80 420834 6366.68 273 268 66.1
D 2 250 39788 598.27 273 268 66.1

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