ASTROSAT CZTI

Data Quality Report

Orbit 20211129_A10_064T02_9000004788_level2

Creation date: 2021-12-03T12:56:56.612003
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/AS1A10_064T02_9000004788cztM0_level2_bc.evt modeM0/AS1A10_064T02_9000004788cztM0_level2_quad_clean.evt
Size (bytes)6,014,482,5601,489,521,600
Size5.6 GB 1.4 GB
Events in quadrant A24,309,6069,663,503
Events in quadrant B37,379,9109,453,524
Events in quadrant C33,818,9609,523,610
Events in quadrant D78,887,2238,652,290

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04020
B04020
C04010
D04040

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02325120
B03097360
C02559960
D04285660

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A023380
B023380
C023350
D023380

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A1141901180.103337%
B114174102959.016939%
C11415813991.225494%
D113933109589.617933%

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 169060 114547 10 10 0.01% 0.01%
B 169060 113403 189 189 0.11% 0.17%
C 169060 114498 260 260 0.15% 0.23%
D 169059 114256 2024 2024 1.20% 1.77%

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 12 16 488086 367.33 6026 5942 1312.6
A 15 169 206982 153.17 6026 5942 1312.6
A 13 254 169808 124.84 6026 5942 1312.6
B 5 172 7038386 6258.7 5715 5592 1123.7
B 0 219 3267381 2902.76 5715 5592 1123.7
B 5 255 1084378 960.04 5715 5592 1123.7
C 15 214 4639222 3545.44 5846 5818 1306.9
C 0 10 2064991 1575.66 5846 5818 1306.9
C 1 23 1375356 1047.96 5846 5818 1306.9
D 8 195 25163303 18107.15 5676 5482 1389.4
D 1 52 8521131 6129.07 5676 5482 1389.4
D 2 250 6887029 4952.94 5676 5482 1389.4

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