ASTROSAT CZTI

Data Quality Report

Orbit 35876

Creation date: 2022-06-08T20:59:12.242350
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_080T01_9000005146_35876cztM0_level2.evt modeM0/AS1A11_080T01_9000005146_35876cztM0_level2_quad_clean.evt
Size (bytes)522,947,520102,551,040
Size498.7 MB 97.8 MB
Events in quadrant A4,028,706676,353
Events in quadrant B3,729,774676,752
Events in quadrant C3,515,373666,948
Events in quadrant D4,128,824638,146

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0250
B0250
C0250
D0250

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01340
B01340
C01340
D01340

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01612715
B01509313
C0141696
D01666711

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6408861.342072%
B64081312.044320%
C6411791.232257%
D6412751.169682%

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 9010 6414 67 67 0.74% 1.04%
B 9010 6414 70 70 0.78% 1.09%
C 9010 6415 60 60 0.67% 0.94%
D 9010 6416 53 53 0.59% 0.83%

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 7 48 483490 3105.62 764 751 155.4
A 15 169 359534 2308.17 764 751 155.4
A 10 83 174847 1120.02 764 751 155.4
B 5 172 471343 3254.08 754 737 144.6
B 5 255 151547 1042.8 754 737 144.6
B 0 213 60609 413.99 754 737 144.6
C 15 214 266043 1538.92 740 749 172.4
C 0 10 212247 1226.86 740 749 172.4
C 9 69 76964 442.11 740 749 172.4
D 8 195 712801 3917.21 739 720 181.8
D 13 249 180680 989.97 739 720 181.8
D 2 250 177651 973.31 739 720 181.8

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