ASTROSAT CZTI

Data Quality Report

Orbit 58431

Creation date: 2026-07-16T18:14:27.554968
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_045T01_9000006590_58431cztM0_level2.fits modeM0/AS1A14_045T01_9000006590_58431cztM0_level2_quad_clean.evt
Size (bytes)557,544,960117,002,880
Size531.7 MB 111.6 MB
Events in quadrant A3,728,116773,012
Events in quadrant B7,868,043783,828
Events in quadrant C4,166,920731,806
Events in quadrant D4,246,605690,609

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01620
B01620
C01620
D01620

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0169200
B0290260
C0183191
D0182670

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A8105210.259099%
B81057559.315238%
C81041321.628825%
D8105891.098088%

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 8105 8105 6 6 0.07% 0.07%
B 8105 8105 455 455 5.61% 5.61%
C 8104 8104 98 98 1.21% 1.21%
D 8105 8105 78 78 0.96% 0.96%

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 3 14 52840 228.65 914 889 227.2
A 10 251 36810 158.1 914 889 227.2
A 4 159 29466 125.78 914 889 227.2
B 5 172 3806724 19991.67 879 847 190.4
B 4 201 254361 1331.67 879 847 190.4
B 4 171 102938 536.27 879 847 190.4
C 15 147 254941 1057.57 877 870 240.2
C 6 223 104562 431.62 877 870 240.2
C 14 245 92484 381.34 877 870 240.2
D 8 240 268093 1075.82 880 842 248.4
D 2 249 100954 403.0 880 842 248.4
D 2 120 74048 294.69 880 842 248.4

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