ASTROSAT CZTI

Data Quality Report

Orbit 55037

Creation date: 2025-12-01T09:20:31.255695
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_025T01_9000006530_55037cztM0_level2.fits modeM0/AS1A14_025T01_9000006530_55037cztM0_level2_quad_clean.evt
Size (bytes)723,559,68087,275,520
Size690.0 MB 83.2 MB
Events in quadrant A7,272,224549,062
Events in quadrant B3,205,687712,940
Events in quadrant C3,074,933626,550
Events in quadrant D12,706,417282,418

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02637217
B0144962
C0143306
D04246134

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01380
B01380
C01380
D01380

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0170
B0170
C0170
D0180

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6757128919.076513%
B6761510.754326%
C6759320.473443%
D6757384356.874353%

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 7871 6762 1138 1138 14.46% 16.83%
B 7871 6762 16 16 0.20% 0.24%
C 7871 6762 24 24 0.30% 0.35%
D 7871 6761 3071 3071 39.02% 45.42%

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 15 32 4381440 26312.93 672 658 166.5
A 0 8 187943 1124.92 672 658 166.5
A 13 248 37291 220.03 672 658 166.5
B 5 185 119301 766.86 721 694 154.7
B 4 141 84561 542.25 721 694 154.7
B 10 247 73703 472.05 721 694 154.7
C 14 254 67655 341.57 706 700 196.0
C 9 237 65650 331.34 706 700 196.0
C 12 252 60109 303.08 706 700 196.0
D 11 129 6912270 50531.0 476 455 136.8
D 15 94 2765489 20214.65 476 455 136.8
D 10 181 295559 2157.45 476 455 136.8

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