ASTROSAT CZTI

Data Quality Report

Orbit 20180220_A04_112T01_9000001908_level2

Creation date: 2018-07-07T19:57:06.785477
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_112T01_9000001908cztM0_level2_bc.evt modeM0/AS1A04_112T01_9000001908cztM0_level2_quad_clean.evt
Size (bytes)1,796,725,440734,391,360
Size1.7 GB 700.4 MB
Events in quadrant A12,080,4494,854,460
Events in quadrant B13,434,6694,608,181
Events in quadrant C11,238,5054,859,542
Events in quadrant D14,446,3504,688,728

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A09600
B09600
C09600
D09600

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0820
B0820
C0820
D0820

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01058320
B01195310
C01023550
D01099390

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A471118041.706608%
B4711141778.866294%
C4711110582.245760%
D4711110312.188449%

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 55227 47111 3 3 0.01% 0.01%
B 55227 46864 110 110 0.20% 0.23%
C 55227 47111 355 355 0.64% 0.75%
D 55227 47114 155 155 0.28% 0.33%

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 1086027 2001.89 2514 2473 541.3
A 1 162 454111 834.41 2514 2473 541.3
A 15 223 299866 549.44 2514 2473 541.3
B 4 239 2477175 5508.82 2411 2359 449.2
B 3 64 732942 1626.24 2411 2359 449.2
B 0 219 265277 585.24 2411 2359 449.2
C 0 207 1557679 2903.67 2466 2448 535.6
C 14 234 15482 24.33 2466 2448 535.6
C 13 61 14988 23.41 2466 2448 535.6
D 1 52 2726846 4770.98 2489 2412 571.0
D 8 195 1274903 2228.36 2489 2412 571.0
D 2 14 347262 603.9 2489 2412 571.0

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