ASTROSAT CZTI

Data Quality Report

Orbit 51461

Creation date: 2025-04-03T17:35:50.495626
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_51461cztM0_level2.fits modeM0/AS1A13_090T01_9000006458_51461cztM0_level2_quad_clean.evt
Size (bytes)2,779,623,360215,861,760
Size2.6 GB 205.9 MB
Events in quadrant A21,743,4861,522,469
Events in quadrant B14,659,5571,856,308
Events in quadrant C42,835,146425,536
Events in quadrant D22,110,6861,349,289

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0785782
B0575682
C01409352
D0797562

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A030
B030
C030
D030

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04040
B04040
C04040
D04040

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A20042394619.688654%
B2004216128.043109%
C200421587179.188704%
D20042376918.805508%

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 20417 20045 2896 2896 14.18% 14.45%
B 20417 20045 1175 1175 5.76% 5.86%
C 20417 20042 12959 12959 63.47% 64.66%
D 20417 20045 3541 3541 17.34% 17.67%

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 6781441 13897.96 1987 1931 487.8
A 12 250 4715272 9662.32 1987 1931 487.8
A 5 240 457197 933.29 1987 1931 487.8
B 5 172 3601997 8046.2 2083 2004 447.4
B 15 52 605736 1349.38 2083 2004 447.4
B 4 206 377781 839.88 2083 2004 447.4
C 4 12 22503812 81279.47 1008 999 276.9
C 15 179 14735936 53222.14 1008 999 276.9
C 13 3 351773 1266.98 1008 999 276.9
D 6 42 7395339 14045.14 1891 1827 526.4
D 10 199 1437530 2727.34 1891 1827 526.4
D 8 176 1181242 2240.48 1891 1827 526.4

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