ASTROSAT CZTI

Data Quality Report

Orbit 20161130_A02_124T01_9000000842_level2

Creation date: 2017-09-19T08:03:52.734684
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/AS1A02_124T01_9000000842cztM0_level2.evt modeM0/AS1A02_124T01_9000000842cztM0_level2_quad_clean.evt
Size (bytes)1,922,950,080366,655,680
Size1.8 GB 349.7 MB
Events in quadrant A13,569,2542,299,175
Events in quadrant B13,871,3302,312,469
Events in quadrant C13,330,7672,276,610
Events in quadrant D15,489,4002,208,017

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0605270
B0615570
C0607090
D0671080

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A05960
B05960
C05960
D05960

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0270
B0260
C0260
D0270

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A292353111.063793%
B292353961.354541%
C292351840.629383%
D292355932.028391%

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 30850 29241 6 6 0.02% 0.02%
B 30850 29241 37 37 0.12% 0.13%
C 30850 29241 20 20 0.06% 0.07%
D 30850 29241 319 319 1.03% 1.09%

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 15 236 479006 705.46 3352 3279 674.3
A 8 15 86156 122.9 3352 3279 674.3
A 15 174 72997 103.39 3352 3279 674.3
B 0 219 284070 437.0 3381 3296 642.5
B 0 229 248364 381.43 3381 3296 642.5
B 4 81 114422 172.96 3381 3296 642.5
C 4 254 434461 572.74 3272 3281 752.8
C 1 241 61476 77.3 3272 3281 752.8
C 8 128 32862 39.29 3272 3281 752.8
D 4 95 1180409 1488.21 3254 3155 791.1
D 2 152 857346 1079.82 3254 3155 791.1
D 11 241 359206 450.1 3254 3155 791.1

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