ASTROSAT CZTI

Data Quality Report

Orbit 20190501_A05_104T06_9000002878_level2

Creation date: 2019-05-02T11:31:37.667356
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/AS1A05_104T06_9000002878cztM0_level2_bc.evt modeM0/AS1A05_104T06_9000002878cztM0_level2_quad_clean.evt
Size (bytes)1,355,641,920340,781,760
Size1.3 GB 325.0 MB
Events in quadrant A6,155,0132,300,096
Events in quadrant B6,505,6112,301,574
Events in quadrant C6,001,2522,187,728
Events in quadrant D20,474,8811,602,177

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0470
B0470
C0470
D0470

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A05700
B05700
C05700
D05700

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0585120
B0602750
C0585540
D01498660

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A280181820.649582%
B280182530.902991%
C280182620.935113%
D280181263745.103148%

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 32713 28016 6 6 0.02% 0.02%
B 32713 28016 3 3 0.01% 0.01%
C 32713 28014 4 4 0.01% 0.01%
D 32712 28012 62 62 0.19% 0.22%

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 5 16 208220 631.63 1521 1495 327.3
A 4 2 41603 122.55 1521 1495 327.3
A 13 254 39169 115.11 1521 1495 327.3
B 7 220 228248 796.55 1525 1490 284.7
B 4 216 75959 261.59 1525 1490 284.7
B 0 198 75808 261.06 1525 1490 284.7
C 3 233 309390 917.0 1440 1432 335.8
C 0 207 104422 306.67 1440 1432 335.8
C 8 128 13985 37.38 1440 1432 335.8
D 10 66 14196342 53421.19 1139 1101 265.7
D 7 238 926884 3484.01 1139 1101 265.7
D 5 222 496397 1863.96 1139 1101 265.7

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