ASTROSAT CZTI

Data Quality Report

Orbit 20201001_T03_231T01_9000003910_level2

Creation date: 2025-12-15T11:55:11.481756
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/AS1T03_231T01_9000003910cztM0_level2.fits modeM0/AS1T03_231T01_9000003910cztM0_level2_quad_clean.evt
Size (bytes)1,111,772,160952,476,480
Size1.0 GB 908.4 MB
Events in quadrant A6,849,6305,551,748
Events in quadrant B6,550,5485,521,430
Events in quadrant C6,723,0985,351,015
Events in quadrant D5,729,4264,606,969

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A023240
B023240
C023240
D023240

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02680680
B02799620
C02373670
D03398950

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01600
B01600
C01600
D01600

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A11401134833.054968%
B11401132072.812886%
C11401119351.697205%
D11401175616.631816%

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 129181 114011 0 0 0.00% 0.00%
B 129181 113989 0 0 0.00% 0.00%
C 129181 114009 0 0 0.00% 0.00%
D 129181 113972 0 0 0.00% 0.00%

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 29 6655 11.52 1782 1671 432.5
A 7 110 5633 9.16 1782 1671 432.5
A 0 30 5251 8.28 1782 1671 432.5
B 2 9 5296 10.84 1732 1648 336.6
B 2 8 4465 8.37 1732 1648 336.6
B 5 225 4404 8.19 1732 1648 336.6
C 12 241 4725 6.89 1775 1658 444.9
C 3 126 4588 6.59 1775 1658 444.9
C 9 233 4512 6.42 1775 1658 444.9
D 3 14 4162 6.17 1636 1489 433.1
D 10 189 4037 5.88 1636 1489 433.1
D 6 231 3998 5.79 1636 1489 433.1

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