ASTROSAT CZTI

Data Quality Report

Orbit 20180725_A04_207T01_9000002254_level2

Creation date: 2018-07-27T14:10:58.075967
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_207T01_9000002254cztM0_level2_bc.evt modeM0/AS1A04_207T01_9000002254cztM0_level2_quad_clean.evt
Size (bytes)3,416,932,8001,247,641,920
Size3.2 GB 1.2 GB
Events in quadrant A21,222,9027,923,583
Events in quadrant B25,700,0167,917,503
Events in quadrant C26,221,9617,899,004
Events in quadrant D23,866,9487,539,197

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A019360
B019360
C019360
D019360

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01310
B01310
C01310
D01310

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02017710
B02178340
C02132760
D02120180

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A949989661.016864%
B9500124812.611551%
C950018240.867359%
D9500018481.945263%

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 108204 94989 11 11 0.01% 0.01%
B 108204 94989 287 287 0.27% 0.30%
C 108204 94994 11 11 0.01% 0.01%
D 108204 94991 333 333 0.31% 0.35%

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 1741662 1632.99 4867 4766 1063.6
A 9 143 446222 415.05 4867 4766 1063.6
A 13 248 78697 69.51 4867 4766 1063.6
B 3 64 1973528 2134.73 4888 4751 922.3
B 10 16 1966062 2126.63 4888 4751 922.3
B 0 219 650967 700.69 4888 4751 922.3
C 3 233 6601393 6312.6 4752 4685 1045.0
C 3 9 611293 580.48 4752 4685 1045.0
C 4 254 358292 338.38 4752 4685 1045.0
D 2 33 1791087 1627.94 4753 4580 1097.4
D 13 172 1176990 1068.35 4753 4580 1097.4
D 7 38 838478 759.88 4753 4580 1097.4

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