ASTROSAT CZTI

Data Quality Report

Orbit 20161119_A02_085T02_9000000808_level2

Creation date: 2021-08-25T19:20:34.023954
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/AS1A02_085T02_9000000808cztM0_level2_bc.evt modeM0/AS1A02_085T02_9000000808cztM0_level2_quad_clean.evt
Size (bytes)2,333,868,480961,640,640
Size2.2 GB 917.1 MB
Events in quadrant A14,657,6686,134,437
Events in quadrant B18,688,7716,103,752
Events in quadrant C13,794,3176,202,472
Events in quadrant D18,802,5105,923,514

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A014280
B014220
C014280
D014100

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01050
B01050
C01050
D01050

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01460000
B01627960
C01432060
D01598410

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A695027131.025870%
B6939422733.275499%
C694735180.745613%
D693939771.407923%

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 86645 70457 4 4 0.00% 0.01%
B 86645 70403 109 109 0.13% 0.15%
C 86645 70469 0 0 0.00% 0.00%
D 86645 70417 35 35 0.04% 0.05%

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 14 111 549010 726.3 3432 3363 751.3
A 8 15 537791 711.37 3432 3363 751.3
A 4 2 128630 166.74 3432 3363 751.3
B 3 64 3334572 5115.91 3420 3325 651.2
B 15 204 490818 748.66 3420 3325 651.2
B 0 214 409739 624.14 3420 3325 651.2
C 1 16 394008 519.06 3393 3339 752.6
C 9 16 41692 50.96 3393 3339 752.6
C 7 159 33586 40.19 3393 3339 752.6
D 2 63 2900412 3629.55 3393 3251 798.2
D 2 136 874948 1092.06 3393 3251 798.2
D 5 97 539121 671.34 3393 3251 798.2

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