ASTROSAT CZTI

Data Quality Report

Orbit 55825

Creation date: 2026-01-22T09:59:31.932792
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_127T10_9000006542_55825cztM0_level2.fits modeM0/AS1A14_127T10_9000006542_55825cztM0_level2_quad_clean.evt
Size (bytes)408,412,80096,655,680
Size389.5 MB 92.2 MB
Events in quadrant A4,621,421614,451
Events in quadrant B2,922,189676,249
Events in quadrant C3,150,198607,390
Events in quadrant D3,908,632566,755

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0181802
B0138572
C0146953
D0165522

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0230
B0230
C0230
D0230

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01360
B01360
C01360
D01360

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A66291562.353296%
B6629660.995625%
C6629721.086137%
D66291171.764972%

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 8964 6631 106 106 1.18% 1.60%
B 8964 6632 14 14 0.16% 0.21%
C 8964 6632 75 75 0.84% 1.13%
D 8964 6631 82 82 0.91% 1.24%

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 12 115 1225525 7239.96 686 671 169.2
A 8 192 230216 1356.81 686 671 169.2
A 0 8 171841 1011.76 686 671 169.2
B 7 252 95988 631.0 689 663 151.1
B 0 213 68539 449.3 689 663 151.1
B 12 111 17956 114.47 689 663 151.1
C 9 38 166798 885.68 679 673 187.6
C 14 254 132334 701.94 679 673 187.6
C 12 250 118845 630.02 679 673 187.6
D 8 245 517793 2704.87 668 638 191.2
D 11 129 299334 1562.27 668 638 191.2
D 3 12 96255 500.1 668 638 191.2

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