ASTROSAT CZTI

Data Quality Report

Orbit 07940

Creation date: 2024-06-27T15:25:47.129635
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/AS1G06_117T01_9000001086_07940cztM0_level2.evt modeM0/AS1G06_117T01_9000001086_07940cztM0_level2_quad_clean.evt
Size (bytes)1,283,103,360226,512,000
Size1.2 GB 216.0 MB
Events in quadrant A8,562,6911,399,544
Events in quadrant B8,923,2431,421,665
Events in quadrant C8,365,0321,414,966
Events in quadrant D11,745,9701,338,618

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0220
B0220
C0220
D0220

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03860
B03860
C03860
D03860

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03843278
B03906997
C03818175
D047809102

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A186523581.919365%
B186443992.140099%
C186522791.495818%
D186527073.790478%

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 20843 18693 2 2 0.01% 0.01%
B 20843 18692 23 23 0.11% 0.12%
C 20843 18692 0 0 0.00% 0.00%
D 20843 18693 388 388 1.86% 2.08%

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 0 128 83553 185.38 2176 2126 439.2
A 15 234 47993 104.42 2176 2126 439.2
A 0 226 20144 41.02 2176 2126 439.2
B 10 16 125053 293.14 2190 2139 419.3
B 11 51 124266 291.27 2190 2139 419.3
B 10 245 74347 172.21 2190 2139 419.3
C 1 16 41082 78.78 2130 2135 494.4
C 13 61 16249 28.55 2130 2135 494.4
C 9 236 8636 13.15 2130 2135 494.4
D 1 52 2812241 5420.92 2108 2039 518.4
D 5 233 442429 849.52 2108 2039 518.4
D 2 152 364894 699.95 2108 2039 518.4

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