ASTROSAT CZTI

Data Quality Report

Orbit 20200125_A07_127T02_9000003460_level2

Creation date: 2021-08-30T18:38:33.514085
Switch to: Orbit-wise | Merged OBSID-wise
web.py, SVN revision $Rev$

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/AS1A07_127T02_9000003460cztM0_level2_bc.evt modeM0/AS1A07_127T02_9000003460cztM0_level2_quad_clean.evt
Size (bytes)5,470,551,3601,769,555,520
Size5.1 GB 1.6 GB
Events in quadrant A31,743,76111,623,150
Events in quadrant B29,964,38411,748,252
Events in quadrant C29,809,67211,062,380
Events in quadrant D65,312,22810,259,765

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02010
B02010
C02010
D02010

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02842310
B02801940
C02805410
D04028600

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A026440
B026440
C026460
D026440

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A12994617531.349022%
B12994817801.369779%
C12994624971.921567%
D1299431671712.864872%

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 155493 129943 245 245 0.16% 0.19%
B 155493 129942 25 25 0.02% 0.02%
C 155493 129944 285 285 0.18% 0.22%
D 155493 129941 8391 8391 5.40% 6.46%

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 6 16 3959244 2567.29 7170 7047 1539.4
A 13 254 191922 120.09 7170 7047 1539.4
A 15 174 93091 55.89 7170 7047 1539.4
B 0 189 1081334 801.42 7208 7046 1340.5
B 0 190 577232 425.36 7208 7046 1340.5
B 0 229 211150 152.26 7208 7046 1340.5
C 10 9 3253939 2044.23 6801 6785 1588.4
C 2 16 110734 65.44 6801 6785 1588.4
C 7 247 102358 60.17 6801 6785 1588.4
D 1 52 36566655 23863.95 6602 6371 1532.0
D 7 238 2119318 1379.18 6602 6371 1532.0
D 2 234 515993 332.64 6602 6371 1532.0

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