ASTROSAT CZTI

Data Quality Report

Orbit 51479

Creation date: 2025-04-04T20:15:11.297197
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/AS1A13_090T01_9000006458_51479cztM0_level2.fits modeM0/AS1A13_090T01_9000006458_51479cztM0_level2_quad_clean.evt
Size (bytes)757,834,56089,688,960
Size722.7 MB 85.5 MB
Events in quadrant A5,854,592643,325
Events in quadrant B3,650,668714,991
Events in quadrant C4,109,822626,523
Events in quadrant D13,905,059252,538

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0219752
B0155842
C0171562
D0460412

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0120
B0130
C0130
D0130

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01380
B01380
C01380
D01380

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A68693825.561217%
B68691852.693260%
C68693224.687727%
D6869418460.911341%

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 7909 6869 197 197 2.49% 2.87%
B 7909 6869 25 25 0.32% 0.36%
C 7909 6869 185 185 2.34% 2.69%
D 7909 6869 3938 3938 49.79% 57.33%

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 12 3 1644777 8945.45 761 741 183.8
A 12 194 195633 1060.44 761 741 183.8
A 5 240 152504 825.77 761 741 183.8
B 5 172 117652 717.97 757 729 162.9
B 8 234 113738 693.93 757 729 162.9
B 0 213 63793 387.25 757 729 162.9
C 13 3 526494 2615.34 735 728 201.0
C 0 177 205953 1020.86 735 728 201.0
C 15 215 129452 640.32 735 728 201.0
D 8 176 10539182 76391.42 487 471 138.0
D 3 12 854767 6192.49 487 471 138.0
D 11 176 252931 1829.99 487 471 138.0

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