ASTROSAT CZTI

Data Quality Report

Orbit 55257

Creation date: 2025-12-15T07:33:59.919049
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_009T01_9000006534_55257cztM0_level2.fits modeM0/AS1A14_009T01_9000006534_55257cztM0_level2_quad_clean.evt
Size (bytes)395,363,52094,968,000
Size377.0 MB 90.6 MB
Events in quadrant A3,201,919620,103
Events in quadrant B2,920,123673,787
Events in quadrant C4,494,845570,877
Events in quadrant D3,521,689565,633

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01300
B01300
C01300
D01300

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0141922
B0135962
C0178552
D0148712

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0150
B0160
C0160
D0160

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6380831.300940%
B6380580.909091%
C63804677.319749%
D63801021.598746%

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 7545 6381 49 49 0.65% 0.77%
B 7545 6381 28 28 0.37% 0.44%
C 7545 6381 467 467 6.19% 7.32%
D 7545 6381 60 60 0.80% 0.94%

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 0 8 273408 1642.79 670 654 166.0
A 4 249 84025 502.14 670 654 166.0
A 7 243 57801 344.2 670 654 166.0
B 5 185 109774 767.62 669 647 142.2
B 10 245 65188 453.99 669 647 142.2
B 2 249 31149 214.56 669 647 142.2
C 13 3 1398689 7821.24 650 644 178.7
C 14 80 176510 983.87 650 644 178.7
C 14 254 119447 664.63 650 644 178.7
D 7 96 232055 1249.74 657 629 185.2
D 5 38 229391 1235.35 657 629 185.2
D 3 12 139406 749.42 657 629 185.2

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