ASTROSAT CZTI

Data Quality Report

Orbit 35427

Creation date: 2022-04-20T21:14:26.939782
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_097T07_9000005072_35427cztM0_level2.evt modeM0/AS1A11_097T07_9000005072_35427cztM0_level2_quad_clean.evt
Size (bytes)777,401,28078,871,680
Size741.4 MB 75.2 MB
Events in quadrant A2,904,580567,783
Events in quadrant B11,646,083332,667
Events in quadrant C3,550,442557,435
Events in quadrant D5,041,276513,786

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0123993
B03865110
C0141442
D0187842

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0170
B0170
C0170
D0180

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01220
B01220
C01220
D01220

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A5932210.354012%
B5931399467.341089%
C59321071.803776%
D59324918.277141%

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 7245 5933 8 8 0.11% 0.13%
B 7245 5933 3324 3324 45.88% 56.03%
C 7245 5933 75 75 1.04% 1.26%
D 7245 5933 394 394 5.44% 6.64%

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 132302 932.32 692 677 141.2
A 9 143 79224 556.36 692 677 141.2
A 13 6 12476 83.57 692 677 141.2
B 4 251 4913426 51837.9 488 474 94.8
B 5 14 1202039 12678.04 488 474 94.8
B 5 31 1160610 12240.91 488 474 94.8
C 0 207 413081 2623.09 670 673 157.2
C 0 10 277428 1760.28 670 673 157.2
C 15 214 240130 1523.05 670 673 157.2
D 7 80 1429397 8973.44 653 634 159.2
D 8 195 225166 1410.19 653 634 159.2
D 13 249 206606 1293.62 653 634 159.2

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