ASTROSAT CZTI

Data Quality Report

Orbit 55945

Creation date: 2026-02-05T17:07:54.856760
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_066T02_9000006546_55945cztM0_level2.fits modeM0/AS1A14_066T02_9000006546_55945cztM0_level2_quad_clean.evt
Size (bytes)466,194,240107,732,160
Size444.6 MB 102.7 MB
Events in quadrant A3,478,473708,369
Events in quadrant B3,367,612760,324
Events in quadrant C3,755,001673,791
Events in quadrant D6,053,310581,267

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0161980
B0159900
C0170421
D0235570

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01540
B01540
C01540
D01540

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7745100.129116%
B7746180.232378%
C77451131.459006%
D774582410.639122%

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 7745 7745 5 5 0.06% 0.06%
B 7746 7746 6 6 0.08% 0.08%
C 7745 7745 79 79 1.02% 1.02%
D 7745 7745 669 669 8.64% 8.64%

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 150266 737.85 811 791 202.6
A 15 32 67850 331.02 811 791 202.6
A 5 16 31460 151.39 811 791 202.6
B 0 213 41708 236.38 805 775 173.2
B 4 21 33049 186.37 805 775 173.2
B 12 111 21594 120.22 805 775 173.2
C 12 252 305866 1409.97 789 784 216.4
C 13 3 235305 1083.87 789 784 216.4
C 11 244 32119 144.82 789 784 216.4
D 11 129 2718789 13048.17 730 697 208.3
D 1 31 178922 855.57 730 697 208.3
D 3 12 111697 532.85 730 697 208.3

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