ASTROSAT CZTI

Data Quality Report

Orbit 56642

Creation date: 2026-03-18T09:20:06.501231
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_083T06_9000006558_56642cztM0_level2.fits modeM0/AS1A14_083T06_9000006558_56642cztM0_level2_quad_clean.evt
Size (bytes)532,558,080119,617,920
Size507.9 MB 114.1 MB
Events in quadrant A4,202,403784,470
Events in quadrant B4,318,329845,247
Events in quadrant C4,781,698742,969
Events in quadrant D5,758,709665,610

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01700
B01700
C01700
D01700

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A040
B040
C040
D040

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0189251
B0189371
C0201311
D0231821

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A83991131.345398%
B84001481.761905%
C8400971.154762%
D84004255.059524%

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 8809 8400 52 52 0.59% 0.62%
B 8810 8401 45 45 0.51% 0.54%
C 8810 8401 71 71 0.81% 0.85%
D 8810 8400 349 349 3.96% 4.15%

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 10 251 538159 2414.98 906 881 222.5
A 13 248 47669 210.3 906 881 222.5
A 6 179 42218 185.8 906 881 222.5
B 4 206 145066 748.33 903 870 192.7
B 5 185 132617 683.72 903 870 192.7
B 8 128 119876 617.6 903 870 192.7
C 12 252 544656 2297.01 879 866 236.7
C 13 3 401507 1692.34 879 866 236.7
C 9 38 231412 973.84 879 866 236.7
D 2 249 910513 3780.43 854 816 240.6
D 14 49 386255 1601.77 854 816 240.6
D 3 12 379558 1573.94 854 816 240.6

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