ASTROSAT CZTI

Data Quality Report

Orbit 20180917_A04_230T01_9000002374_level2

Creation date: 2018-09-19T10:37:46.773589
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/AS1A04_230T01_9000002374cztM0_level2_bc.evt modeM0/AS1A04_230T01_9000002374cztM0_level2_quad_clean.evt
Size (bytes)3,278,073,6001,242,233,280
Size3.1 GB 1.2 GB
Events in quadrant A23,082,6478,123,414
Events in quadrant B22,713,9518,080,853
Events in quadrant C18,731,5617,725,888
Events in quadrant D28,626,8087,536,824

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A018300
B018300
C018300
D018300

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01600
B01600
C01600
D01600

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01991250
B02016440
C01878410
D02193860

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A8987512011.336300%
B8987515991.779138%
C8987511671.298470%
D8987530743.420306%

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 105891 89865 21 21 0.02% 0.02%
B 105891 89866 15 15 0.01% 0.02%
C 105891 89863 2 2 0.00% 0.00%
D 105891 89862 622 622 0.59% 0.69%

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 3 80 3095132 2963.72 4816 4734 1042.7
A 13 210 451752 428.69 4816 4734 1042.7
A 15 174 391930 371.32 4816 4734 1042.7
B 7 220 956996 1062.98 4808 4702 895.9
B 0 189 747482 829.11 4808 4702 895.9
B 0 190 367702 405.19 4808 4702 895.9
C 3 233 537115 494.82 4592 4584 1076.2
C 0 207 368604 338.24 4592 4584 1076.2
C 7 247 56959 48.67 4592 4584 1076.2
D 1 52 6180888 5600.92 4697 4531 1102.7
D 12 218 1891161 1710.86 4697 4531 1102.7
D 13 232 669372 602.9 4697 4531 1102.7

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