ASTROSAT CZTI

Data Quality Report

Orbit 25177

Creation date: 2024-06-27T19:14:45.482374
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/AS1A07_171T02_9000003686_25177cztM0_level2.evt modeM0/AS1A07_171T02_9000003686_25177cztM0_level2_quad_clean.evt
Size (bytes)618,382,080100,725,120
Size589.7 MB 96.1 MB
Events in quadrant A3,373,655660,250
Events in quadrant B7,599,119613,316
Events in quadrant C3,567,405634,482
Events in quadrant D3,687,608628,930

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0149960
B0273570
C0153810
D0157160

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A040
B040
C040
D040

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7369360.488533%
B7370159921.696065%
C7370941.275441%
D7370310.420624%

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 7768 7368 0 0 0.00% 0.00%
B 7769 7369 1397 1397 17.98% 18.96%
C 7769 7369 12 12 0.15% 0.16%
D 7769 7369 2 2 0.03% 0.03%

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 13 254 11596 61.25 875 857 175.3
A 3 137 8173 41.73 875 857 175.3
A 0 226 7484 37.8 875 857 175.3
B 3 64 4394969 29085.21 794 773 151.1
B 0 189 28442 183.14 794 773 151.1
B 0 190 26301 168.97 794 773 151.1
C 7 247 146891 745.28 838 841 196.0
C 14 238 136397 691.73 838 841 196.0
C 9 54 10417 48.87 838 841 196.0
D 8 195 402281 1963.44 848 824 204.5
D 2 234 30111 143.24 848 824 204.5
D 1 52 28894 137.28 848 824 204.5

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