ASTROSAT CZTI

Data Quality Report

Orbit 20180108_A04_130T01_9000001822_level2

Creation date: 2018-07-30T14:05:51.685855
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_130T01_9000001822cztM0_level2_bc.evt modeM0/AS1A04_130T01_9000001822cztM0_level2_quad_clean.evt
Size (bytes)2,156,762,880640,483,200
Size2.0 GB 610.8 MB
Events in quadrant A16,858,8133,967,909
Events in quadrant B14,857,7883,936,467
Events in quadrant C12,413,5053,975,254
Events in quadrant D17,510,2063,815,907

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A010940
B010940
C010940
D010940

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01396200
B01279980
C01174690
D01343620

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0740
B0740
C0740
D0740

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A5398211812.187766%
B5398219443.601200%
C539827361.363417%
D5398217873.310363%

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 60937 53984 6 6 0.01% 0.01%
B 60937 53982 57 57 0.09% 0.11%
C 60938 53983 21 21 0.03% 0.04%
D 60938 53982 389 389 0.64% 0.72%

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 15 3492430 5936.32 2716 2663 587.9
A 13 251 1480778 2514.37 2716 2663 587.9
A 1 162 760718 1289.5 2716 2663 587.9
B 0 85 1853876 3611.78 2711 2638 512.6
B 4 239 1113565 2167.43 2711 2638 512.6
B 3 64 334764 647.98 2711 2638 512.6
C 4 254 1700645 2876.97 2671 2634 590.2
C 15 208 186504 311.53 2671 2634 590.2
C 4 112 26533 40.49 2671 2634 590.2
D 1 52 4472372 7167.38 2685 2587 623.6
D 14 34 862044 1378.15 2685 2587 623.6
D 10 253 289308 459.76 2685 2587 623.6

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