ASTROSAT CZTI

Data Quality Report

Orbit 20220509_A09_142T06_9000005132_level2

Creation date: 2022-05-14T12:27:55.786014
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/AS1A09_142T06_9000005132cztM0_level2_bc.evt modeM0/AS1A09_142T06_9000005132cztM0_level2_quad_clean.evt
Size (bytes)833,909,760284,529,600
Size795.3 MB 271.3 MB
Events in quadrant A5,597,8511,855,969
Events in quadrant B6,204,7491,876,107
Events in quadrant C5,204,0191,854,314
Events in quadrant D6,991,8171,765,099

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0420020
B0471270
C0400530
D0477390

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03780
B03780
C03780
D03780

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01020
B01020
C01020
D01020

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A183754812.617687%
B183759995.436735%
C183752961.610884%
D183757153.891156%

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 28566 18380 317 317 1.11% 1.72%
B 28566 18374 12 12 0.04% 0.07%
C 28566 18375 9 9 0.03% 0.05%
D 28566 18374 213 213 0.75% 1.16%

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 8 192 902032 4123.37 993 981 218.5
A 10 83 436616 1993.54 993 981 218.5
A 15 223 268033 1222.08 993 981 218.5
B 5 172 1839324 9509.99 977 958 193.3
B 0 190 182113 937.13 977 958 193.3
B 4 232 128234 658.41 977 958 193.3
C 15 214 729325 3230.13 980 973 225.5
C 0 10 528563 2339.78 980 973 225.5
C 15 208 73148 320.09 980 973 225.5
D 13 249 768070 3298.63 983 957 232.6
D 1 52 729383 3132.27 983 957 232.6
D 14 52 310493 1331.02 983 957 232.6

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