ASTROSAT CZTI

Data Quality Report

Orbit 20171022_A04_171T01_9000001634_level2

Creation date: 2018-05-18T07:29:51.008973
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_171T01_9000001634cztM0_level2.evt modeM0/AS1A04_171T01_9000001634cztM0_level2_quad_clean.evt
Size (bytes)13,340,473,9201,910,980,800
Size12.4 GB 1.8 GB
Events in quadrant A116,558,09111,578,722
Events in quadrant B96,378,35812,073,447
Events in quadrant C72,109,57312,085,855
Events in quadrant D108,282,40511,256,474

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02210
B02210
C02210
D02210

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04521810
B03908140
C03271480
D04289640

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A032300
B032280
C032320
D032340

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A158746126427.963665%
B15886281615.137163%
C15891822861.438478%
D15880487095.484119%

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 181727 159006 7401 7401 4.07% 4.65%
B 181727 159140 3154 3154 1.74% 1.98%
C 181727 159137 18 18 0.01% 0.01%
D 181727 159068 5441 5441 2.99% 3.42%

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 20771699 5652.04 18196 17808 3671.9
A 8 5 15518844 4221.5 18196 17808 3671.9
A 8 15 7856088 2134.65 18196 17808 3671.9
B 4 239 18928721 5334.94 18703 18220 3544.7
B 15 204 1131724 314.14 18703 18220 3544.7
B 4 80 698793 192.0 18703 18220 3544.7
C 13 61 135274 27.35 18429 18507 4269.5
C 1 3 117327 23.15 18429 18507 4269.5
C 12 4 68580 11.73 18429 18507 4269.5
D 1 52 8529753 1973.7 17912 17414 4312.9
D 2 14 5403272 1248.79 17912 17414 4312.9
D 10 157 5042436 1165.12 17912 17414 4312.9

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