ASTROSAT CZTI

Data Quality Report

Orbit 20171031_A04_137T01_9000001654_level2

Creation date: 2017-11-01T16:44:31.724836
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_137T01_9000001654cztM0_level2.evt modeM0/AS1A04_137T01_9000001654cztM0_level2_quad_clean.evt
Size (bytes)2,600,953,920385,954,560
Size2.4 GB 368.1 MB
Events in quadrant A18,499,8452,454,406
Events in quadrant B21,395,8112,383,053
Events in quadrant C14,323,0422,552,457
Events in quadrant D22,650,5302,357,216

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A05760
B05760
C05760
D05760

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0530
B0530
C0530
D0530

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0732900
B0819960
C0614090
D0862450

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A2824111864.199568%
B2824125008.852378%
C282414851.717361%
D2824125749.114408%

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 33341 28246 613 613 1.84% 2.17%
B 33341 28245 1464 1464 4.39% 5.18%
C 33341 28246 185 185 0.55% 0.65%
D 33341 28245 1792 1792 5.37% 6.34%

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 8 5 3821968 5616.29 3375 3302 679.9
A 0 8 370307 539.77 3375 3302 679.9
A 1 162 270951 393.64 3375 3302 679.9
B 4 239 4113477 6607.72 3307 3226 622.0
B 3 64 3277259 5263.4 3307 3226 622.0
B 15 204 222498 352.51 3307 3226 622.0
C 9 204 1314254 1714.25 3330 3355 764.7
C 13 61 24428 27.56 3330 3355 764.7
C 14 234 17101 17.98 3330 3355 764.7
D 1 52 3983012 5198.46 3208 3122 765.6
D 10 253 2901710 3786.08 3208 3122 765.6
D 7 80 2108236 2749.66 3208 3122 765.6

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