ASTROSAT CZTI

Data Quality Report

Orbit 20190831_A06_005T05_9000003136_level2

Creation date: 2019-09-03T15:47:55.589344
Switch to: Orbit-wise | Merged OBSID-wise
web.py, SVN revision $Rev: 1121 $

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/AS1A06_005T05_9000003136cztM0_level2_bc.evt modeM0/AS1A06_005T05_9000003136cztM0_level2_quad_clean.evt
Size (bytes)3,140,758,080857,390,400
Size2.9 GB 817.7 MB
Events in quadrant A32,941,6005,015,903
Events in quadrant B14,734,5185,775,274
Events in quadrant C14,670,0885,506,585
Events in quadrant D28,372,1085,236,953

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01090
B01090
C01090
D01090

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02168600
B01382650
C01407820
D01887970

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A013160
B013160
C013160
D013160

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A646121065516.490745%
B646127911.224231%
C6461214132.186900%
D6461236355.625890%

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 75538 64601 1442 1442 1.91% 2.23%
B 75538 64608 14 14 0.02% 0.02%
C 75538 64607 14 14 0.02% 0.02%
D 75538 64610 754 754 1.00% 1.17%

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 15 236 19153345 27740.75 3164 3108 690.3
A 11 47 892268 1288.02 3164 3108 690.3
A 5 16 530389 763.81 3164 3108 690.3
B 3 64 247198 368.48 3521 3440 661.5
B 0 190 187725 278.58 3521 3440 661.5
B 0 197 182318 270.4 3521 3440 661.5
C 3 233 1759851 2256.37 3320 3308 778.5
C 0 10 66353 80.98 3320 3308 778.5
C 0 207 31793 36.59 3320 3308 778.5
D 13 174 6182136 7984.4 3330 3215 773.9
D 7 238 3418269 4412.93 3330 3215 773.9
D 1 52 1296825 1671.6 3330 3215 773.9

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