ASTROSAT CZTI

Data Quality Report

Orbit 35551

Creation date: 2022-04-26T09:34:51.592479
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_093T01_9000005090_35551cztM0_level2.evt modeM0/AS1A11_093T01_9000005090_35551cztM0_level2_quad_clean.evt
Size (bytes)697,392,00074,517,120
Size665.1 MB 71.1 MB
Events in quadrant A11,798,25446,760
Events in quadrant B2,895,448632,213
Events in quadrant C2,993,229638,947
Events in quadrant D3,100,035591,602

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01000
B01000
C01000
D01000

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0384193
B0116482
C0118152
D0124552

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0370
B0370
C0370
D0380

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A4917491699.979662%
B49171723.498068%
C49171553.152329%
D49171633.315029%

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 7008 4916 4726 4726 67.44% 96.14%
B 7009 4918 90 90 1.28% 1.83%
C 7009 4918 114 114 1.63% 2.32%
D 7009 4918 118 118 1.68% 2.40%

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 15 169 11458005 654276.78 78 76 17.5
A 10 83 25700 1463.2 78 76 17.5
A 9 143 7262 410.34 78 76 17.5
B 5 172 455761 4089.53 600 585 111.3
B 15 85 32310 285.03 600 585 111.3
B 0 189 24522 215.06 600 585 111.3
C 0 10 356549 2597.28 601 607 137.0
C 15 214 216964 1578.74 601 607 137.0
C 9 187 60508 437.09 601 607 137.0
D 2 250 276085 1945.85 587 572 141.6
D 2 153 158712 1116.88 587 572 141.6
D 10 118 148765 1046.63 587 572 141.6

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