ASTROSAT CZTI

Data Quality Report

Orbit 04940

Creation date: 2024-06-27T14:49:06.439899
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/AS1G05_021T01_9000000624_04940cztM0_level2.evt modeM0/AS1G05_021T01_9000000624_04940cztM0_level2_quad_clean.evt
Size (bytes)641,640,960114,638,400
Size611.9 MB 109.3 MB
Events in quadrant A6,958,281673,153
Events in quadrant B3,817,807766,148
Events in quadrant C3,342,733774,899
Events in quadrant D4,799,673729,898

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A040
B040
C040
D040

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0259643
B0166232
C0155732
D0198532

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01540
B01540
C01540
D01540

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7572143418.938193%
B75721111.465927%
C7572230.303751%
D75723164.173270%

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 7747 7572 1331 1331 17.18% 17.58%
B 7747 7572 13 13 0.17% 0.17%
C 7747 7573 1 1 0.01% 0.01%
D 7747 7573 246 246 3.18% 3.25%

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 31 3834651 24425.2 762 744 157.0
A 0 50 157724 1000.09 762 744 157.0
A 15 31 20109 123.37 762 744 157.0
B 15 204 205732 1226.8 860 838 167.0
B 0 219 104986 623.59 860 838 167.0
B 15 54 51374 302.58 860 838 167.0
C 1 16 37036 189.03 826 829 191.5
C 9 247 36800 187.8 826 829 191.5
C 8 128 15786 78.09 826 829 191.5
D 2 33 451552 2253.5 813 785 200.0
D 1 7 345621 1723.93 813 785 200.0
D 13 235 266317 1327.46 813 785 200.0

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