ASTROSAT CZTI

Data Quality Report

Orbit 20181026_A05_002T09_9000002456_level2

Creation date: 2025-11-25T09:51:45.604696
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_002T09_9000002456cztM0_level2.fits modeM0/AS1A05_002T09_9000002456cztM0_level2_quad_clean.evt
Size (bytes)83,931,84076,023,360
Size80.0 MB 72.5 MB
Events in quadrant A535,292466,600
Events in quadrant B517,236471,293
Events in quadrant C507,906428,212
Events in quadrant D447,454401,191

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0166910
B0185710
C0185540
D0172160

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0220
B0220
C0220
D0220

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01560
B01560
C01560
D01560

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7682911.184587%
B76821752.278053%
C76821471.913564%
D7682931.210622%

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 9021 7681 0 0 0.00% 0.00%
B 9021 7681 0 0 0.00% 0.00%
C 9021 7681 0 0 0.00% 0.00%
D 9021 7681 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 29 471 9.63 139 133 35.1
A 7 110 439 8.72 139 133 35.1
A 9 19 434 8.58 139 133 35.1
B 2 9 448 11.28 136 132 28.0
B 2 8 382 8.93 136 132 28.0
B 5 128 361 8.18 136 132 28.0
C 3 202 386 7.13 134 127 36.3
C 1 81 370 6.69 134 127 36.3
C 3 203 360 6.41 134 127 36.3
D 6 231 339 6.38 127 117 34.8
D 6 67 327 6.03 127 117 34.8
D 3 159 311 5.58 127 117 34.8

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