ASTROSAT CZTI

Data Quality Report

Orbit 20180810_T02_085T01_9000002296_level2

Creation date: 2025-11-24T00:57:40.860465
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/AS1T02_085T01_9000002296cztM0_level2.fits modeM0/AS1T02_085T01_9000002296cztM0_level2_quad_clean.evt
Size (bytes)1,026,722,880888,125,760
Size979.2 MB 847.0 MB
Events in quadrant A6,335,5465,135,886
Events in quadrant B6,077,5205,171,964
Events in quadrant C6,185,9724,932,484
Events in quadrant D5,303,1204,466,345

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A021380
B021380
C021380
D021380

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01740
B01740
C01740
D01740

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02428160
B02257220
C02298440
D02935730

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A10489031793.030794%
B10489015911.516827%
C10489017651.682715%
D10489063796.081609%

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 121205 104873 0 0 0.00% 0.00%
B 121205 104885 0 0 0.00% 0.00%
C 121205 104885 0 0 0.00% 0.00%
D 121205 104628 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 5811 10.72 1649 1552 397.4
A 7 110 5026 8.74 1649 1552 397.4
A 9 19 4719 7.97 1649 1552 397.4
B 2 9 4951 10.94 1609 1540 311.7
B 2 8 4090 8.18 1609 1540 311.7
B 3 80 4089 8.18 1609 1540 311.7
C 1 80 4671 7.59 1631 1524 414.8
C 1 81 4606 7.43 1631 1524 414.8
C 12 241 4272 6.62 1631 1524 414.8
D 6 231 3811 6.09 1514 1380 399.2
D 3 14 3769 5.98 1514 1380 399.2
D 10 189 3697 5.8 1514 1380 399.2

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