ASTROSAT CZTI

Data Quality Report

Orbit 36941

Creation date: 2024-06-27T21:33:24.351693
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/AS1A11_024T01_9000005250_36941cztM0_level2.evt modeM0/AS1A11_024T01_9000005250_36941cztM0_level2_quad_clean.evt
Size (bytes)439,007,04079,467,840
Size418.7 MB 75.8 MB
Events in quadrant A2,768,642528,763
Events in quadrant B3,188,455527,503
Events in quadrant C2,892,509508,499
Events in quadrant D4,090,184474,884

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0320
B0320
C0320
D0330

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01080
B01080
C01080
D01080

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0114083
B0127342
C0116242
D0156622

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A5231200.382336%
B5231951.816096%
C5231891.701396%
D52313646.958517%

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 7293 5232 3 3 0.04% 0.06%
B 7293 5232 62 62 0.85% 1.19%
C 7293 5232 73 73 1.00% 1.40%
D 7293 5232 337 337 4.62% 6.44%

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 10 83 244647 1889.17 642 634 129.2
A 13 254 12259 90.0 642 634 129.2
A 13 6 11113 81.13 642 634 129.2
B 5 172 165959 1375.83 633 619 120.2
B 4 81 126726 1049.37 633 619 120.2
B 0 219 68953 568.62 633 619 120.2
C 0 10 242593 1720.72 606 613 140.6
C 15 214 224432 1591.58 606 613 140.6
C 10 49 52412 368.34 606 613 140.6
D 12 17 552114 3771.24 594 578 146.2
D 12 233 456140 3115.0 594 578 146.2
D 1 52 172814 1177.7 594 578 146.2

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