ASTROSAT CZTI

Data Quality Report

Orbit 20180221_G08_055T01_9000001912_level2

Creation date: 2018-07-09T10:48:43.587669
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/AS1G08_055T01_9000001912cztM0_level2_bc.evt modeM0/AS1G08_055T01_9000001912cztM0_level2_quad_clean.evt
Size (bytes)4,719,242,8801,568,520,000
Size4.4 GB 1.5 GB
Events in quadrant A26,975,24010,190,771
Events in quadrant B46,603,6469,542,134
Events in quadrant C23,323,63110,261,179
Events in quadrant D38,238,4889,683,113

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01790
B01790
C01790
D01790

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02449840
B03414740
C02352550
D02829590

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A023280
B023280
C023280
D023280

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A11424615631.368100%
B1142461526913.365019%
C11424610290.900688%
D11424635363.095076%

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 132228 114253 10 10 0.01% 0.01%
B 132228 113486 833 833 0.63% 0.73%
C 132228 114249 8 8 0.01% 0.01%
D 132228 114246 799 799 0.60% 0.70%

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 12 189 2413358 1892.08 5899 5784 1272.4
A 8 15 640303 498.66 5899 5784 1272.4
A 1 162 413360 320.31 5899 5784 1272.4
B 0 85 8902760 8595.15 5533 5390 1035.2
B 4 239 8690713 8390.3 5533 5390 1035.2
B 3 64 3723363 3591.68 5533 5390 1035.2
C 0 207 118475 86.73 5887 5827 1298.8
C 14 234 104235 75.77 5887 5827 1298.8
C 12 4 48120 32.56 5887 5827 1298.8
D 1 52 13541879 10093.13 5825 5625 1341.1
D 8 195 950213 704.32 5825 5625 1341.1
D 10 157 711536 526.35 5825 5625 1341.1

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