ASTROSAT CZTI

Data Quality Report

Orbit 20171221_A04_145T02_9000001790_level2

Creation date: 2017-12-23T10:59:17.299385
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_145T02_9000001790cztM0_level2_bc.evt modeM0/AS1A04_145T02_9000001790cztM0_level2_quad_clean.evt
Size (bytes)256,530,240107,245,440
Size244.6 MB 102.3 MB
Events in quadrant A1,489,787712,798
Events in quadrant B1,953,621704,967
Events in quadrant C1,353,588713,475
Events in quadrant D2,542,106683,760

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0220
B0220
C0220
D0220

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01260
B01260
C01260
D01260

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0136410
B0157430
C0128380
D0165190

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6204751.208897%
B62042594.174726%
C6204560.902643%
D62041903.062540%

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 7474 6204 3 3 0.04% 0.05%
B 7474 6203 3 3 0.04% 0.05%
C 7474 6204 0 0 0.00% 0.00%
D 7474 6204 41 41 0.55% 0.66%

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 1 162 41005 529.62 345 339 76.8
A 13 248 35415 456.82 345 339 76.8
A 13 251 20519 262.82 345 339 76.8
B 4 239 427332 6356.53 343 335 67.2
B 15 204 129272 1919.43 343 335 67.2
B 3 209 22618 331.72 343 335 67.2
C 12 4 7073 87.83 342 339 76.7
C 0 207 6415 79.25 342 339 76.7
C 13 61 2113 23.14 342 339 76.7
D 1 52 762265 9337.37 342 331 81.6
D 8 195 146128 1786.72 342 331 81.6
D 14 34 86980 1061.87 342 331 81.6

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