ASTROSAT CZTI

Data Quality Report

Orbit 51435

Creation date: 2025-04-02T11:51:26.711218
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_51435cztM0_level2.fits modeM0/AS1A13_090T01_9000006458_51435cztM0_level2_quad_clean.evt
Size (bytes)728,835,84079,632,000
Size695.1 MB 75.9 MB
Events in quadrant A7,112,280494,992
Events in quadrant B3,783,914613,454
Events in quadrant C10,927,745336,761
Events in quadrant D4,667,400526,303

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0254141
B0155671
C0368074
D0182411

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0100
B0100
C0100
D0100

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01280
B01280
C01280
D01280

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6295134521.366164%
B62964036.400889%
C6295297847.307387%
D62953775.988880%

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 7370 6295 1144 1144 15.52% 18.17%
B 7371 6296 167 167 2.27% 2.65%
C 7370 6295 2768 2768 37.56% 43.97%
D 7370 6295 328 328 4.45% 5.21%

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 3170705 21121.12 609 593 150.1
A 12 250 732755 4878.09 609 593 150.1
A 12 3 246160 1636.11 609 593 150.1
B 5 172 495737 3591.54 647 625 137.9
B 4 206 119013 858.79 647 625 137.9
B 15 52 95476 688.05 647 625 137.9
C 4 12 5840052 43879.12 485 481 133.1
C 0 176 1330737 9995.68 485 481 133.1
C 10 171 598921 4496.74 485 481 133.1
D 6 42 780893 4266.46 650 625 182.9
D 8 176 391712 2138.44 650 625 182.9
D 8 192 281461 1535.59 650 625 182.9

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