ASTROSAT CZTI

Data Quality Report

Orbit 31755

Creation date: 2024-06-27T20:32:20.978452
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/AS1A10_059T01_9000004634_31755cztM0_level2.evt modeM0/AS1A10_059T01_9000004634_31755cztM0_level2_quad_clean.evt
Size (bytes)573,324,48071,222,400
Size546.8 MB 67.9 MB
Events in quadrant A5,466,966435,462
Events in quadrant B3,980,697478,761
Events in quadrant C3,230,497466,913
Events in quadrant D4,352,611430,574

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0100
B0100
C0100
D0111

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01084
B01095
C01095
D01117

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A020703963
B016098914
C013608669
D017105954

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A4891127025.966060%
B49011503.060600%
C49102805.702648%
D488958311.924729%

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 7717 4922 660 660 8.55% 13.41%
B 7717 4932 8 8 0.10% 0.16%
C 7717 4936 57 57 0.74% 1.15%
D 7716 4928 322 322 4.17% 6.53%

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 13 3193987 27046.24 589 579 118.1
A 13 254 7339 57.25 589 579 118.1
A 3 137 5580 42.36 589 579 118.1
B 6 159 1292300 10371.36 654 636 124.5
B 10 245 50360 399.26 654 636 124.5
B 0 229 20293 157.84 654 636 124.5
C 0 10 492756 3368.65 629 633 146.1
C 3 233 149618 1019.82 629 633 146.1
C 14 238 102463 697.04 629 633 146.1
D 12 218 1015767 6889.73 623 608 147.3
D 8 195 713186 4836.16 623 608 147.3
D 12 233 87703 591.1 623 608 147.3

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