ASTROSAT CZTI

Data Quality Report

Orbit 21146

Creation date: 2024-06-27T18:24:07.409913
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/AS1T03_136T01_9000003124_21146cztM0_level2.evt modeM0/AS1T03_136T01_9000003124_21146cztM0_level2_quad_clean.evt
Size (bytes)488,848,32095,486,400
Size466.2 MB 91.1 MB
Events in quadrant A3,459,082630,995
Events in quadrant B3,395,345647,996
Events in quadrant C3,210,485608,217
Events in quadrant D4,323,049575,473

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0142013
B0140292
C0134382
D0169232

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01240
B01240
C01240
D01240

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0170
B0180
C0180
D0180

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A61481252.033182%
B6148731.187378%
C6148881.431360%
D61481883.057905%

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 7468 6149 53 53 0.71% 0.86%
B 7468 6149 2 2 0.03% 0.03%
C 7468 6149 6 6 0.08% 0.10%
D 7468 6149 124 124 1.66% 2.02%

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 15 236 276695 1690.09 814 798 163.2
A 15 192 31602 188.7 814 798 163.2
A 8 6 10617 60.15 814 798 163.2
B 3 64 38179 246.83 816 799 151.4
B 0 230 36629 236.6 816 799 151.4
B 0 190 24928 159.33 816 799 151.4
C 14 238 122430 682.09 768 774 178.4
C 3 233 48217 266.0 768 774 178.4
C 0 10 41762 229.8 768 774 178.4
D 1 52 329712 1760.23 771 748 186.9
D 7 238 285347 1522.84 771 748 186.9
D 7 223 194349 1035.93 771 748 186.9

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