ASTROSAT CZTI

Data Quality Report

Orbit 35807

Creation date: 2022-05-19T01:40:58.123509
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/AS1A09_146T01_9000005142_35807cztM0_level2.evt modeM0/AS1A09_146T01_9000005142_35807cztM0_level2_quad_clean.evt
Size (bytes)559,549,44065,367,360
Size533.6 MB 62.3 MB
Events in quadrant A4,938,862361,580
Events in quadrant B3,320,550420,203
Events in quadrant C3,168,765411,783
Events in quadrant D5,116,379371,001

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01220
B01220
C01220
D01220

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0186753
B0135802
C0127372
D0190962

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0320
B0320
C0320
D0320

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A59305128.634064%
B5930701.180438%
C5930751.264755%
D593064710.910624%

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 9096 5931 460 460 5.06% 7.76%
B 9096 5932 47 47 0.52% 0.79%
C 9096 5932 63 63 0.69% 1.06%
D 9096 5931 636 636 6.99% 10.72%

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 2267193 17376.93 650 637 130.4
A 10 83 156349 1193.79 650 637 130.4
A 13 254 7218 50.45 650 637 130.4
B 5 172 192539 1435.75 691 673 133.6
B 5 255 111634 830.33 691 673 133.6
B 0 190 102528 762.19 691 673 133.6
C 15 214 250236 1584.04 675 677 157.5
C 0 10 230586 1459.32 675 677 157.5
C 10 49 42545 265.75 675 677 157.5
D 2 250 1207350 7614.18 647 627 158.5
D 13 249 699813 4411.72 647 627 158.5
D 8 195 170581 1072.38 647 627 158.5

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