ASTROSAT CZTI

Data Quality Report

Orbit 35806

Creation date: 2022-05-20T09:40:30.118872
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_146T01_9000005142_35806cztM0_level2.evt modeM0/AS1A09_146T01_9000005142_35806cztM0_level2_quad_clean.evt
Size (bytes)2,041,087,680155,966,400
Size1.9 GB 148.7 MB
Events in quadrant A28,608,102417,296
Events in quadrant B9,519,5131,103,766
Events in quadrant C11,055,0731,078,208
Events in quadrant D11,561,1211,022,205

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03280
B03280
C03280
D03280

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0957095
B0386484
C0426694
D0452684

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0550
B0550
C0550
D0550

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A159151072767.401822%
B159152821.771913%
C159154122.588753%
D159158535.359724%

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 21465 15916 9869 9869 45.98% 62.01%
B 21465 15919 201 201 0.94% 1.26%
C 21465 15919 382 382 1.78% 2.40%
D 21464 15918 719 719 3.35% 4.52%

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 15 169 24827954 138635.88 890 871 179.1
A 10 83 229795 1278.32 890 871 179.1
A 15 232 43397 237.47 890 871 179.1
B 5 172 686245 1973.45 1810 1760 346.8
B 5 255 293006 839.7 1810 1760 346.8
B 0 213 280818 804.56 1810 1760 346.8
C 10 49 2397476 5861.78 1768 1780 408.7
C 9 187 730889 1783.98 1768 1780 408.7
C 15 214 657950 1605.51 1768 1780 408.7
D 13 249 1773579 4194.41 1750 1705 422.4
D 14 52 970297 2292.87 1750 1705 422.4
D 2 250 807813 1908.23 1750 1705 422.4

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