ASTROSAT CZTI

Data Quality Report

Orbit 36820

Creation date: 2024-06-27T21:32:01.812851
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_075T01_9000005244_36820cztM0_level2.evt modeM0/AS1A11_075T01_9000005244_36820cztM0_level2_quad_clean.evt
Size (bytes)1,035,293,76090,826,560
Size987.3 MB 86.6 MB
Events in quadrant A3,951,878599,445
Events in quadrant B15,187,479446,929
Events in quadrant C5,908,566585,063
Events in quadrant D5,761,154555,557

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01620
B01620
C01620
D01620

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0171304
B0506812
C0228002
D0228172

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0200
B0200
C0200
D0200

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A8092290.358379%
B8092446755.202669%
C80925747.093426%
D80925456.735047%

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 44628 8094 16 16 0.04% 0.20%
B 44627 8092 4127 4127 9.25% 51.00%
C 44628 8094 440 440 0.99% 5.44%
D 44628 8094 497 497 1.11% 6.14%

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 10 83 309281 1690.22 902 884 182.5
A 9 143 104048 565.41 902 884 182.5
A 13 6 20985 110.17 902 884 182.5
B 12 1 11448561 88326.37 680 663 129.6
B 5 172 697716 5378.12 680 663 129.6
B 0 213 75099 574.31 680 663 129.6
C 14 254 1824669 9268.98 854 861 196.8
C 15 214 336557 1706.08 854 861 196.8
C 0 207 311665 1579.57 854 861 196.8
D 2 250 1362364 6546.43 855 832 208.0
D 12 233 412253 1978.17 855 832 208.0
D 13 249 350769 1682.55 855 832 208.0

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