ASTROSAT CZTI

Data Quality Report

Orbit 20220512_A09_146T01_9000005142_level2

Creation date: 2022-05-20T13:04:20.886769
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_146T01_9000005142cztM0_level2_bc.evt modeM0/AS1A09_146T01_9000005142cztM0_level2_quad_clean.evt
Size (bytes)4,651,266,2401,248,462,720
Size4.3 GB 1.2 GB
Events in quadrant A35,968,5827,437,004
Events in quadrant B28,562,9938,243,259
Events in quadrant C27,921,6088,078,498
Events in quadrant D41,958,6727,552,590

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A019400
B019400
C019400
D019400

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03033460
B02275640
C02134030
D02782410

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03290
B03290
C03290
D03290

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A948101391714.678831%
B9481019822.090497%
C9481013751.450269%
D9481058286.147031%

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 127845 94719 112 112 0.09% 0.12%
B 127845 94806 129 129 0.10% 0.14%
C 127845 94812 186 186 0.15% 0.20%
D 127845 94796 429 429 0.34% 0.45%

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 15 169 16479171 16760.0 4439 4371 983.0
A 10 83 1904104 1932.62 4439 4371 983.0
A 13 6 168040 166.5 4439 4371 983.0
B 5 172 3373631 3497.06 4903 4798 963.3
B 5 255 2288214 2370.33 4903 4798 963.3
B 0 213 1247406 1289.9 4903 4798 963.3
C 15 214 3724336 3364.39 4780 4734 1105.6
C 10 49 2086451 1882.92 4780 4734 1105.6
C 0 10 2085679 1882.22 4780 4734 1105.6
D 2 250 5760840 5093.9 4742 4600 1130.0
D 13 249 3200647 2828.29 4742 4600 1130.0
D 7 223 2976549 2629.98 4742 4600 1130.0

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