ASTROSAT CZTI

Data Quality Report

Orbit 51456

Creation date: 2025-04-03T07:42:56.202560
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_51456cztM0_level2.fits modeM0/AS1A13_090T01_9000006458_51456cztM0_level2_quad_clean.evt
Size (bytes)935,415,36098,936,640
Size892.1 MB 94.4 MB
Events in quadrant A6,824,050715,726
Events in quadrant B4,425,237803,958
Events in quadrant C11,667,423441,774
Events in quadrant D11,085,727473,432

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0259542
B0187731
C0403181
D0385471

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A020
B020
C020
D020

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01640
B01640
C01640
D01640

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A80605747.121588%
B80602032.518610%
C8060329940.930521%
D8060266033.002481%

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 8265 8061 376 376 4.55% 4.66%
B 8265 8061 87 87 1.05% 1.08%
C 8265 8061 2966 2966 35.89% 36.79%
D 8265 8061 2485 2485 30.07% 30.83%

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 1406714 6671.43 848 826 210.7
A 7 64 1067658 5062.49 848 826 210.7
A 4 175 189319 894.46 848 826 210.7
B 15 52 217777 1171.52 866 836 185.2
B 5 185 161039 865.12 866 836 185.2
B 0 171 103398 553.85 866 836 185.2
C 4 12 5956429 33471.61 639 632 177.9
C 15 179 2484517 13959.45 639 632 177.9
C 13 3 234578 1314.78 639 632 177.9
D 6 42 4723110 23712.15 705 678 199.2
D 8 176 1940244 9738.9 705 678 199.2
D 11 176 302043 1513.21 705 678 199.2

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