ASTROSAT CZTI

Data Quality Report

Orbit 20170312_A02_071T01_9000001078_level2

Creation date: 2017-09-23T09:36:30.058456
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/AS1A02_071T01_9000001078cztM0_level2.evt modeM0/AS1A02_071T01_9000001078cztM0_level2_quad_clean.evt
Size (bytes)10,309,158,7201,868,281,920
Size9.6 GB 1.7 GB
Events in quadrant A73,655,18711,791,166
Events in quadrant B70,683,91212,137,903
Events in quadrant C80,085,76211,818,362
Events in quadrant D78,291,09711,187,403

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02140
B02140
C02140
D02140

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03147750
B03040900
C03349050
D03308900

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A028680
B028680
C028680
D028680

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A14089240712.889447%
B14089131422.230093%
C14089232032.273373%
D14089242903.044885%

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 162537 140919 1455 1455 0.90% 1.03%
B 162537 140920 576 576 0.35% 0.41%
C 162537 140920 1244 1244 0.77% 0.88%
D 162537 140920 2518 2518 1.55% 1.79%

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 15 239 7357845 2219.67 16548 16196 3307.5
A 2 79 1453295 434.49 16548 16196 3307.5
A 15 223 293061 83.71 16548 16196 3307.5
B 4 239 3435040 1084.3 16797 16372 3152.9
B 4 81 402673 122.52 16797 16372 3152.9
B 11 51 328437 98.98 16797 16372 3152.9
C 1 16 14061158 3749.29 16310 16390 3746.0
C 9 68 2129905 564.21 16310 16390 3746.0
C 8 229 216859 53.52 16310 16390 3746.0
D 1 52 7579039 1912.36 16222 15731 3955.0
D 14 34 1575254 394.32 16222 15731 3955.0
D 13 112 1453135 363.44 16222 15731 3955.0

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