ASTROSAT CZTI

Data Quality Report

Orbit 20201128_A10_021T02_9000004036_level2

Creation date: 2025-12-17T23:03:06.811533
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/AS1A10_021T02_9000004036cztM0_level2.fits modeM0/AS1A10_021T02_9000004036cztM0_level2_quad_clean.evt
Size (bytes)240,439,680252,305,280
Size229.3 MB 240.6 MB
Events in quadrant A1,477,0441,577,453
Events in quadrant B1,403,1141,569,751
Events in quadrant C1,444,3241,477,229
Events in quadrant D1,201,4361,261,372

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0526640
B0603390
C0529300
D0879610

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0190
B0190
C0190
D0190

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A05180
B05180
C05180
D05180

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A255222090.818901%
B255224411.727921%
C255223231.265575%
D2552223709.286106%

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 27347 25521 0 0 0.00% 0.00%
B 27347 25519 0 0 0.00% 0.00%
C 27347 25522 0 0 0.00% 0.00%
D 27346 25486 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 1215 8.82 384 360 96.9
A 7 110 1163 8.28 384 360 96.9
A 0 30 1120 7.84 384 360 96.9
B 2 9 1116 10.24 371 353 74.5
B 2 8 972 8.31 371 353 74.5
B 3 17 947 7.97 371 353 74.5
C 1 80 1078 7.45 380 356 96.9
C 1 81 1052 7.19 380 356 96.9
C 3 126 1030 6.96 380 356 96.9
D 4 246 915 6.53 343 313 92.2
D 15 47 890 6.26 343 313 92.2
D 3 159 832 5.63 343 313 92.2

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