ASTROSAT CZTI

Data Quality Report

Orbit 51659

Creation date: 2025-04-22T11:26:25.168104
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_037T05_9000006460_51659cztM0_level2.fits modeM0/AS1A13_037T05_9000006460_51659cztM0_level2_quad_clean.evt
Size (bytes)718,698,240103,423,680
Size685.4 MB 98.6 MB
Events in quadrant A8,288,844617,574
Events in quadrant B4,624,430754,377
Events in quadrant C6,943,890639,795
Events in quadrant D6,173,915605,467

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A060
B070
C070
D070

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0297472
B0187122
C0257082
D0235225

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01480
B01480
C01480
D01480

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7389173023.413182%
B73896378.620923%
C7389116915.820815%
D738794312.765669%

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 7403 7389 1073 1073 14.49% 14.52%
B 7404 7390 111 111 1.50% 1.50%
C 7404 7390 756 756 10.21% 10.23%
D 7404 7388 812 812 10.97% 10.99%

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 7 64 3653962 18047.87 817 796 202.4
A 12 3 610241 3010.86 817 796 202.4
A 13 248 384813 1897.17 817 796 202.4
B 1 223 348728 1854.92 863 830 187.6
B 5 32 92592 489.26 863 830 187.6
B 7 252 89195 471.14 863 830 187.6
C 15 189 1544856 6903.64 816 810 223.7
C 12 254 1137767 5083.49 816 810 223.7
C 14 245 394625 1760.8 816 810 223.7
D 10 172 2001538 9000.57 795 767 222.3
D 8 176 384926 1728.16 795 767 222.3
D 2 249 176037 788.46 795 767 222.3

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