ASTROSAT CZTI

Data Quality Report

Orbit 39435

Creation date: 2024-06-27T22:04:31.915394
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/AS1A12_077T06_9000005474_39435cztM0_level2.fits modeM0/AS1A12_077T06_9000005474_39435cztM0_level2_quad_clean.evt
Size (bytes)479,393,28084,931,200
Size457.2 MB 81.0 MB
Events in quadrant A8,071,213479,857
Events in quadrant B2,486,482620,529
Events in quadrant C2,968,468580,160
Events in quadrant D3,802,171515,225

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0276853
B0111252
C0123322
D0151872

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01080
B01080
C01080
D01080

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0310
B0310
C0310
D0320

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A5372145427.066270%
B5372150.279226%
C5372420.781832%
D53723175.900968%

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 7256 5373 1344 1344 18.52% 25.01%
B 7256 5373 6 6 0.08% 0.11%
C 7256 5373 28 28 0.39% 0.52%
D 7256 5373 270 270 3.72% 5.03%

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 15 222 5482011 48743.87 553 543 112.5
A 10 83 433150 3846.95 553 543 112.5
A 15 174 11637 98.65 553 543 112.5
B 5 172 72035 636.11 589 574 112.3
B 8 3 70027 618.23 589 574 112.3
B 5 255 34294 300.16 589 574 112.3
C 15 208 284563 2117.09 572 576 134.1
C 15 214 229443 1706.17 572 576 134.1
C 9 187 104611 775.57 572 576 134.1
D 12 227 712304 5273.44 558 541 135.0
D 12 0 407829 3017.59 558 541 135.0
D 2 249 299815 2217.32 558 541 135.0

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