ASTROSAT CZTI

Data Quality Report

Orbit 53821

Creation date: 2025-09-09T12:49:46.226316
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/AS1A14_022T04_9000006506_53821cztM0_level2.fits modeM0/AS1A14_022T04_9000006506_53821cztM0_level2_quad_clean.evt
Size (bytes)792,642,24075,052,800
Size755.9 MB 71.6 MB
Events in quadrant A4,809,905521,829
Events in quadrant B3,441,547627,516
Events in quadrant C8,216,380421,152
Events in quadrant D12,387,136263,708

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0189024
B0147071
C0287281
D0411411

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01280
B01280
C01280
D01280

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A090
B090
C090
D090

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A616781913.280363%
B63132243.548234%
C6314184929.284131%
D6314359957.000317%

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 7188 6169 703 703 9.78% 11.40%
B 7188 6314 74 74 1.03% 1.17%
C 7189 6315 1701 1701 23.66% 26.94%
D 7189 6314 3201 3201 44.53% 50.70%

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 3 63 1713391 10896.96 642 627 157.2
A 0 8 291327 1849.49 642 627 157.2
A 4 13 190544 1208.29 642 627 157.2
B 5 172 232909 1624.37 666 643 143.0
B 7 0 163464 1138.7 666 643 143.0
B 0 213 126455 879.88 666 643 143.0
C 1 241 3569212 22949.04 561 556 155.5
C 15 224 1998501 12848.23 561 556 155.5
C 12 252 107136 685.38 561 556 155.5
D 8 176 7213157 52501.53 483 461 137.4
D 2 172 2640062 19213.77 483 461 137.4
D 3 12 176491 1281.33 483 461 137.4

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