ASTROSAT CZTI

Data Quality Report

Orbit 20220515_A11_080T01_9000005146_level2_7orbs

Creation date: 2022-06-09T15:30:05.115785
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/AS1A11_080T01_9000005146cztM0_level2_bc.evt modeM0/AS1A11_080T01_9000005146cztM0_level2_quad_clean.evt
Size (bytes)2,117,776,320487,854,720
Size2.0 GB 465.3 MB
Events in quadrant A19,939,9702,977,039
Events in quadrant B11,155,2373,176,818
Events in quadrant C12,853,5133,073,180
Events in quadrant D17,563,3252,900,617

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01670
B01670
C01670
D01670

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A07880
B07880
C07880
D07880

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01371990
B0889550
C0935520
D01128050

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A38556641016.625169%
B385563820.990767%
C3855612833.327627%
D3855622975.957568%

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 55232 38565 596 596 1.08% 1.55%
B 55232 38558 9 9 0.02% 0.02%
C 55232 38557 117 117 0.21% 0.30%
D 55232 38558 291 291 0.53% 0.75%

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 15 169 8753968 18680.13 2051 2012 468.5
A 7 48 2329235 4967.21 2051 2012 468.5
A 10 83 839227 1786.95 2051 2012 468.5
B 5 255 664198 1475.18 2233 2202 448.8
B 5 172 494251 1096.48 2233 2202 448.8
B 4 232 462317 1025.31 2233 2202 448.8
C 15 208 1648140 3364.83 2118 2123 489.2
C 15 214 1494732 3051.23 2118 2123 489.2
C 0 10 1119016 2283.18 2118 2123 489.2
D 7 223 3920464 7622.25 2133 2070 514.1
D 2 250 1541009 2993.62 2133 2070 514.1
D 13 249 1245637 2419.05 2133 2070 514.1

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