ASTROSAT CZTI

Data Quality Report

Orbit 20190507_A05_175T01_9000002894_level2

Creation date: 2025-11-30T01:30:31.554844
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/AS1A05_175T01_9000002894cztM0_level2.fits modeM0/AS1A05_175T01_9000002894cztM0_level2_quad_clean.evt
Size (bytes)923,820,480852,609,600
Size881.0 MB 813.1 MB
Events in quadrant A5,794,4045,321,716
Events in quadrant B5,531,6505,282,160
Events in quadrant C5,572,3844,978,054
Events in quadrant D4,549,8583,715,041

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01420
B01420
C01420
D01420

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01969660
B02012140
C02034040
D03120790

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A019420
B019420
C019420
D019420

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A9517811891.249238%
B9517817311.818698%
C9517819802.080313%
D951781358114.269054%

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 109309 95169 0 0 0.00% 0.00%
B 109309 95162 0 0 0.00% 0.00%
C 109309 95170 0 0 0.00% 0.00%
D 109303 94567 0 0 0.00% 0.00%

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 29 5598 11.46 1506 1415 365.0
A 7 110 4642 8.84 1506 1415 365.0
A 0 30 4334 8.0 1506 1415 365.0
B 2 9 4408 10.54 1459 1391 286.4
B 2 8 3756 8.26 1459 1391 286.4
B 5 225 3655 7.91 1459 1391 286.4
C 1 81 4232 7.61 1469 1370 375.9
C 1 80 4139 7.37 1469 1370 375.9
C 12 241 3928 6.8 1469 1370 375.9
D 3 14 3257 6.03 1298 1182 344.1
D 7 3 3253 6.02 1298 1182 344.1
D 10 189 3220 5.92 1298 1182 344.1

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