ASTROSAT CZTI

Data Quality Report

Orbit 55484

Creation date: 2025-12-30T17:20:42.755484
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_099T01_9000006536_55484cztM0_level2.fits modeM0/AS1A14_099T01_9000006536_55484cztM0_level2_quad_clean.evt
Size (bytes)871,934,400211,429,440
Size831.5 MB 201.6 MB
Events in quadrant A10,187,4491,778,671
Events in quadrant B8,871,1951,929,806
Events in quadrant C12,065,8631,655,872
Events in quadrant D11,27723

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0150
B0150
C0150
D0150

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03980
B03980
C03980
D03980

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0448913
B0411213
C0499383
D0481

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A196093972.024581%
B196091971.004641%
C196097703.926768%
D2000.000000%

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 21033 19610 272 272 1.29% 1.39%
B 21033 19610 29 29 0.14% 0.15%
C 21033 19610 577 577 2.74% 2.94%
D 20 20 0 0 0.00% 0.00%

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 0 8 1001704 1965.56 2058 2002 508.6
A 3 78 545677 1068.94 2058 2002 508.6
A 13 248 198189 385.73 2058 2002 508.6
B 10 247 143794 326.23 2048 1967 434.7
B 5 236 123117 278.67 2048 1967 434.7
B 4 206 121419 274.76 2048 1967 434.7
C 13 3 1901615 3523.29 1987 1970 539.2
C 9 38 1315270 2435.79 1987 1970 539.2
C 12 252 644650 1191.98 1987 1970 539.2
D 11 129 2079 1567.05 2 2 1.3
D 5 173 245 183.34 2 2 1.3
D 8 240 92 67.9 2 2 1.3

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