ASTROSAT CZTI

Data Quality Report

Orbit 51156

Creation date: 2025-03-22T09:48:42.832520
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/AS1C07_001T01_9000006454_51156cztM0_level2.fits modeM0/AS1C07_001T01_9000006454_51156cztM0_level2_quad_clean.evt
Size (bytes)646,747,20098,605,440
Size616.8 MB 94.0 MB
Events in quadrant A6,845,100622,461
Events in quadrant B4,675,493693,288
Events in quadrant C7,890,122592,271
Events in quadrant D3,995,066595,331

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0252204
B0188582
C0282922
D0170182

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01420
B01420
C01420
D01420

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0100
B0110
C0110
D0110

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A69165948.588780%
B69162683.875072%
C691682111.871024%
D69161942.805090%

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 7781 6916 571 571 7.34% 8.26%
B 7781 6917 167 167 2.15% 2.41%
C 7780 6916 740 740 9.51% 10.70%
D 7781 6916 151 151 1.94% 2.18%

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 1719994 9535.89 723 707 180.3
A 12 80 1580709 8763.36 723 707 180.3
A 12 194 200092 1105.87 723 707 180.3
B 0 197 782801 4990.91 726 701 156.7
B 5 185 230672 1467.54 726 701 156.7
B 5 172 173682 1103.87 726 701 156.7
C 10 171 2995449 15427.67 696 687 194.1
C 13 3 436945 2247.41 696 687 194.1
C 15 173 351027 1804.79 696 687 194.1
D 8 176 231315 1136.06 713 687 203.0
D 12 2 183289 899.49 713 687 203.0
D 10 172 163837 803.67 713 687 203.0

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