ASTROSAT CZTI

Data Quality Report

Orbit 20170621_A03_069T02_9000001324_level2

Creation date: 2025-11-14T18:03:27.744500
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/AS1A03_069T02_9000001324cztM0_level2.fits modeM0/AS1A03_069T02_9000001324cztM0_level2_quad_clean.evt
Size (bytes)77,443,20054,892,800
Size73.9 MB 52.3 MB
Events in quadrant A459,900280,320
Events in quadrant B445,156277,872
Events in quadrant C466,456273,181
Events in quadrant D394,088250,477

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01720
B01760
C01720
D01720

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0191780
B0177580
C0170430
D0214050

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0190
B0190
C0190
D0180

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A83171481.779488%
B83271211.453104%
C8353871.041542%
D83433484.171161%

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 10791 8542 0 0 0.00% 0.00%
B 10791 8554 0 0 0.00% 0.00%
C 10787 8565 0 0 0.00% 0.00%
D 10780 8534 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 29 462 10.92 119 112 32.1
A 7 110 377 8.27 119 112 32.1
A 12 254 343 7.21 119 112 32.1
B 2 9 390 10.94 117 112 25.4
B 5 128 314 7.95 117 112 25.4
B 3 17 310 7.79 117 112 25.4
C 1 80 372 7.65 123 114 33.7
C 1 81 368 7.53 123 114 33.7
C 3 126 329 6.38 123 114 33.7
D 1 3 291 6.02 112 102 31.4
D 7 3 284 5.8 112 102 31.4
D 6 38 282 5.73 112 102 31.4

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