ASTROSAT CZTI

Data Quality Report

Orbit 20180222_T02_002T01_9000001914_level2

Creation date: 2018-07-09T11:16:50.597291
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/AS1T02_002T01_9000001914cztM0_level2_bc.evt modeM0/AS1T02_002T01_9000001914cztM0_level2_quad_clean.evt
Size (bytes)2,482,528,3201,124,225,280
Size2.3 GB 1.0 GB
Events in quadrant A14,713,7667,755,219
Events in quadrant B23,869,8316,877,166
Events in quadrant C12,394,9937,834,287
Events in quadrant D20,003,8307,361,374

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A012520
B012520
C012520
D012520

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01130
B01130
C01130
D01130

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01343150
B01950220
C01260400
D01520210

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A615709161.487738%
B615701148418.651941%
C615702970.482378%
D6157023893.880136%

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 72717 61573 25 25 0.03% 0.04%
B 72716 61226 523 523 0.72% 0.85%
C 72717 61574 8 8 0.01% 0.01%
D 72717 61570 429 429 0.59% 0.70%

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 12 189 1123703 1656.61 3111 3059 676.5
A 15 223 609624 896.67 3111 3059 676.5
A 13 248 302277 442.33 3111 3059 676.5
B 4 239 10279067 19371.01 2757 2684 530.5
B 3 64 1251213 2353.48 2757 2684 530.5
B 0 219 350730 656.07 2757 2684 530.5
C 0 207 269353 393.34 3075 3039 677.1
C 14 234 76780 108.91 3075 3039 677.1
C 12 4 19629 24.5 3075 3039 677.1
D 1 52 7639661 10822.87 3040 2942 705.6
D 8 195 329347 462.59 3040 2942 705.6
D 2 234 209033 292.08 3040 2942 705.6

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