ASTROSAT CZTI

Data Quality Report

Orbit 20181029_A05_225T01_9000002470_level2

Creation date: 2025-11-25T12:50:35.466424
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_225T01_9000002470cztM0_level2.fits modeM0/AS1A05_225T01_9000002470cztM0_level2_quad_clean.evt
Size (bytes)77,656,32045,008,640
Size74.1 MB 42.9 MB
Events in quadrant A459,916199,199
Events in quadrant B468,914221,748
Events in quadrant C479,006214,011
Events in quadrant D410,498193,577

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0256380
B0172160
C0163780
D0249280

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01580
B01580
C01580
D01580

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0220
B0220
C0220
D0220

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A766599012.915851%
B76652032.648402%
C76652082.713633%
D76653834.996738%

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 9910 7631 0 0 0.00% 0.00%
B 9910 7665 0 0 0.00% 0.00%
C 9910 7665 0 0 0.00% 0.00%
D 9910 7665 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 29 420 9.98 119 112 30.9
A 7 110 352 7.77 119 112 30.9
A 15 236 351 7.74 119 112 30.9
B 2 9 379 9.58 124 118 27.2
B 5 225 331 7.82 124 118 27.2
B 3 80 329 7.75 124 118 27.2
C 9 242 336 6.28 126 118 34.7
C 12 241 335 6.25 126 118 34.7
C 3 158 323 5.9 126 118 34.7
D 10 189 294 5.79 116 106 32.5
D 7 3 292 5.73 116 106 32.5
D 4 160 290 5.67 116 106 32.5

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