ASTROSAT CZTI

Data Quality Report

Orbit 55158

Creation date: 2025-12-08T12:48:03.886624
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_022T16_9000006532_55158cztM0_level2.fits modeM0/AS1A14_022T16_9000006532_55158cztM0_level2_quad_clean.evt
Size (bytes)436,933,440102,660,480
Size416.7 MB 97.9 MB
Events in quadrant A4,493,652656,665
Events in quadrant B3,358,007720,506
Events in quadrant C4,090,844634,473
Events in quadrant D3,673,345597,248

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01460
B01460
C01460
D01460

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0186332
B0156122
C0173492
D0163442

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0150
B0160
C0160
D0160

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A71742683.735712%
B71741522.118762%
C71741782.481182%
D71741341.867856%

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 7869 7175 176 176 2.24% 2.45%
B 7868 7174 18 18 0.23% 0.25%
C 7868 7173 125 125 1.59% 1.74%
D 7868 7174 87 87 1.11% 1.21%

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 78 1101569 5956.83 755 735 184.8
A 12 115 381940 2062.78 755 735 184.8
A 4 207 19627 102.23 755 735 184.8
B 2 249 177826 1086.44 751 722 163.0
B 5 185 90966 553.6 751 722 163.0
B 4 81 86536 526.42 751 722 163.0
C 13 3 554242 2738.22 734 725 202.1
C 6 223 132064 649.73 734 725 202.1
C 1 16 127782 628.54 734 725 202.1
D 3 12 304263 1467.2 732 700 206.9
D 8 160 122764 589.97 732 700 206.9
D 11 129 112453 540.13 732 700 206.9

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