ASTROSAT CZTI

Data Quality Report

Orbit 51642

Creation date: 2025-04-15T20:12:45.843104
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/AS1A13_037T05_9000006460_51642cztM0_level2.fits modeM0/AS1A13_037T05_9000006460_51642cztM0_level2_quad_clean.evt
Size (bytes)535,613,760100,834,560
Size510.8 MB 96.2 MB
Events in quadrant A5,535,151641,056
Events in quadrant B4,749,656694,219
Events in quadrant C4,418,466634,489
Events in quadrant D4,582,172598,036

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A090
B090
C090
D090

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0212242
B0187571
C0179561
D0182481

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01400
B01400
C01400
D01400

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A69735097.299584%
B69734576.553851%
C69733264.675176%
D69732753.943783%

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 7838 6974 247 247 3.15% 3.54%
B 7838 6974 135 135 1.72% 1.94%
C 7838 6974 150 150 1.91% 2.15%
D 7838 6974 114 114 1.45% 1.63%

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 12 80 736069 3879.03 779 759 189.6
A 12 250 586758 3091.36 779 759 189.6
A 4 175 335538 1766.08 779 759 189.6
B 5 185 627735 3823.98 765 739 164.0
B 10 44 468077 2850.24 765 739 164.0
B 7 252 90685 548.57 765 739 164.0
C 15 189 545619 2604.85 764 758 209.2
C 10 19 179023 852.24 764 758 209.2
C 12 254 163886 779.88 764 758 209.2
D 8 176 546017 2579.53 766 738 211.4
D 2 249 412200 1946.49 766 738 211.4
D 1 3 255769 1206.47 766 738 211.4

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