ASTROSAT CZTI

Data Quality Report

Orbit 20170625_A02_178T01_9000001340_level2

Creation date: 2021-08-27T02:01:15.480533
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/AS1A02_178T01_9000001340cztM0_level2_bc.evt modeM0/AS1A02_178T01_9000001340cztM0_level2_quad_clean.evt
Size (bytes)2,853,483,840995,947,200
Size2.7 GB 949.8 MB
Events in quadrant A21,580,8126,590,457
Events in quadrant B17,690,2396,585,612
Events in quadrant C21,349,8575,142,346
Events in quadrant D20,339,9946,362,977

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A018980
B019000
C019060
D019170

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01867120
B01745090
C01832750
D01793410

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01500
B01530
C01460
D01470

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A8250611231.361113%
B826878220.994110%
C6815064119.407190%
D826317410.896758%

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 126811 86193 7 7 0.01% 0.01%
B 126811 86255 8 8 0.01% 0.01%
C 108262 70083 693 693 0.64% 0.99%
D 126811 86214 76 76 0.06% 0.09%

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 8 5 4422648 4834.78 4194 4110 913.9
A 1 162 361176 390.7 4194 4110 913.9
A 4 2 292965 316.07 4194 4110 913.9
B 0 214 315298 388.49 4194 4075 801.1
B 0 219 297352 366.09 4194 4075 801.1
B 0 229 285974 351.88 4194 4075 801.1
C 4 254 8288306 11871.31 3178 3120 697.9
C 9 68 427363 607.87 3178 3120 697.9
C 14 234 156665 220.0 3178 3120 697.9
D 8 195 1781709 1771.83 4088 3963 1003.3
D 1 52 738124 731.72 4088 3963 1003.3
D 7 71 538812 533.07 4088 3963 1003.3

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