ASTROSAT CZTI

Data Quality Report

Orbit 20921

Creation date: 2024-06-27T18:21:14.677268
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/AS1C04_001T01_9000003082_20921cztM0_level2.evt modeM0/AS1C04_001T01_9000003082_20921cztM0_level2_quad_clean.evt
Size (bytes)481,953,600125,311,680
Size459.6 MB 119.5 MB
Events in quadrant A3,367,634854,634
Events in quadrant B3,674,021842,730
Events in quadrant C3,128,233815,370
Events in quadrant D3,968,203812,780

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01360
B01360
C01360
D01360

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A030
B030
C030
D030

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0146011
B0154551
C0138421
D0162632

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A67421081.601899%
B67431602.372831%
C67431402.076227%
D67421672.477010%

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 6987 6743 15 15 0.21% 0.22%
B 6988 6744 16 16 0.23% 0.24%
C 6988 6744 2 2 0.03% 0.03%
D 6987 6743 86 86 1.23% 1.28%

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 5 16 176172 1076.76 802 783 162.9
A 15 174 103774 632.29 802 783 162.9
A 0 226 7006 38.2 802 783 162.9
B 7 220 237495 1567.79 793 771 151.0
B 4 216 91693 602.16 793 771 151.0
B 0 229 62560 409.22 793 771 151.0
C 14 238 119658 662.77 766 770 179.4
C 0 207 14274 75.28 766 770 179.4
C 13 61 5441 26.04 766 770 179.4
D 1 52 576296 3039.09 785 760 189.4
D 1 20 262347 1381.3 785 760 189.4
D 7 38 51520 268.04 785 760 189.4

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