ASTROSAT CZTI

Data Quality Report

Orbit 20170712_A02_198T01_9000001376_level2

Creation date: 2017-09-24T10:27:40.116454
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_198T01_9000001376cztM0_level2.evt modeM0/AS1A02_198T01_9000001376cztM0_level2_quad_clean.evt
Size (bytes)5,199,082,560982,238,400
Size4.8 GB 936.7 MB
Events in quadrant A37,156,7966,215,918
Events in quadrant B36,593,2436,235,562
Events in quadrant C33,933,6586,227,236
Events in quadrant D44,756,1955,976,501

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A015120
B015200
C015120
D015120

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01580470
B01569690
C01525730
D01838130

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01210
B01200
C01200
D01210

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A743479811.319488%
B743319131.228290%
C743135570.749532%
D7429224973.361062%

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 86973 74784 160 160 0.18% 0.21%
B 86973 74790 44 44 0.05% 0.06%
C 86973 74777 25 25 0.03% 0.03%
D 86973 74774 1990 1990 2.29% 2.66%

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 8 15 1237371 695.04 8844 8670 1767.8
A 1 162 603415 336.43 8844 8670 1767.8
A 15 174 585039 326.03 8844 8670 1767.8
B 0 214 700244 421.33 8862 8673 1641.4
B 0 219 319350 189.27 8862 8673 1641.4
B 4 173 238306 139.9 8862 8673 1641.4
C 9 68 202128 98.42 8602 8627 1966.0
C 14 234 127948 60.69 8602 8627 1966.0
C 13 61 64469 28.4 8602 8627 1966.0
D 1 52 6285498 3043.6 8510 8294 2062.4
D 8 195 2696395 1303.37 8510 8294 2062.4
D 12 233 1590816 767.31 8510 8294 2062.4

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