ASTROSAT CZTI

Data Quality Report

Orbit 52850

Creation date: 2025-07-16T10:21:24.380301
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/AS1C09_011T08_9000006482_52850cztM0_level2.fits modeM0/AS1C09_011T08_9000006482_52850cztM0_level2_quad_clean.evt
Size (bytes)1,041,765,12081,037,440
Size993.5 MB 77.3 MB
Events in quadrant A6,221,858657,540
Events in quadrant B8,726,738594,970
Events in quadrant C6,346,110540,215
Events in quadrant D16,713,829160,543

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0234100
B0309630
C0243110
D0545090

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01440
B01440
C01440
D01440

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A71755607.804878%
B7176151021.042363%
C7176130918.241360%
D7176566578.943701%

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 7175 7175 370 370 5.16% 5.16%
B 7176 7176 950 950 13.24% 13.24%
C 7176 7176 935 935 13.03% 13.03%
D 7175 7175 4876 4876 67.96% 67.96%

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 9 191 1078206 5945.62 731 715 181.2
A 3 62 753709 4155.04 731 715 181.2
A 15 174 325996 1794.91 731 715 181.2
B 8 3 4268230 29286.51 687 663 145.7
B 10 254 654058 4483.97 687 663 145.7
B 1 223 313174 2144.63 687 663 145.7
C 15 224 3077057 16731.97 659 651 183.9
C 2 12 288940 1567.94 659 651 183.9
C 15 144 65870 354.71 659 651 183.9
D 12 2 13220952 117435.14 383 366 112.6
D 8 176 874409 7763.9 383 366 112.6
D 11 176 305528 2710.68 383 366 112.6

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