ASTROSAT CZTI

Data Quality Report

Orbit 55571

Creation date: 2026-01-05T09:16:24.796065
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_021T06_9000006538_55571cztM0_level2.fits modeM0/AS1A14_021T06_9000006538_55571cztM0_level2_quad_clean.evt
Size (bytes)1,372,236,480261,806,400
Size1.3 GB 249.7 MB
Events in quadrant A11,266,3031,697,882
Events in quadrant B9,594,4701,848,825
Events in quadrant C15,855,3731,515,521
Events in quadrant D12,585,8571,534,639

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0140
B0140
C0140
D0140

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0478224
B04330625
C06089713
D05184518

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03900
B03900
C03900
D03900

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A193087824.050135%
B192994772.471631%
C19304195310.117074%
D193038044.165156%

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 20568 19313 553 553 2.69% 2.86%
B 20569 19310 309 309 1.50% 1.60%
C 20568 19312 1441 1441 7.01% 7.46%
D 20568 19312 743 743 3.61% 3.85%

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 4 159 1487083 3091.95 1956 1904 480.3
A 15 32 1232194 2561.31 1956 1904 480.3
A 0 8 625154 1297.53 1956 1904 480.3
B 4 206 743382 1761.55 1958 1881 420.9
B 2 249 584104 1383.16 1958 1881 420.9
B 4 169 127351 298.07 1958 1881 420.9
C 9 38 6748873 13173.11 1871 1849 512.2
C 12 252 980257 1910.28 1871 1849 512.2
C 13 3 313632 608.73 1871 1849 512.2
D 11 129 3209455 5951.58 1905 1818 539.0
D 8 128 478547 884.54 1905 1818 539.0
D 2 172 450984 833.4 1905 1818 539.0

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