ASTROSAT CZTI

Data Quality Report

Orbit 20211015_A10_123T04_9000004726_level2

Creation date: 2021-10-21T12:31:43.821874
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/AS1A10_123T04_9000004726cztM0_level2_bc.evt modeM0/AS1A10_123T04_9000004726cztM0_level2_quad_clean.evt
Size (bytes)6,113,485,4401,446,284,160
Size5.7 GB 1.3 GB
Events in quadrant A43,696,8549,075,523
Events in quadrant B40,616,2809,246,532
Events in quadrant C28,236,8629,311,003
Events in quadrant D65,033,9108,537,753

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03107080
B03007470
C02403320
D03763410

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04360
B04360
C04360
D04360

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A022860
B022860
C022840
D022760

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A11130271146.391619%
B11134672796.537280%
C1113759140.820651%
D11141190398.113202%

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 176409 111379 478 478 0.27% 0.43%
B 176409 111450 612 612 0.35% 0.55%
C 176409 111513 231 231 0.13% 0.21%
D 176409 111537 1727 1727 0.98% 1.55%

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 15 249 19041393 15317.12 5699 5628 1242.8
A 15 237 1520124 1218.64 5699 5628 1242.8
A 10 228 274784 216.58 5699 5628 1242.8
B 12 1 8432326 7626.55 5685 5575 1104.9
B 3 26 2379372 2148.38 5685 5575 1104.9
B 4 251 2263479 2043.49 5685 5575 1104.9
C 0 10 2036021 1551.88 5703 5653 1308.3
C 3 233 1113314 846.62 5703 5653 1308.3
C 9 236 752119 570.55 5703 5653 1308.3
D 8 195 8236290 6252.21 5513 5391 1316.5
D 2 250 7868148 5972.57 5513 5391 1316.5
D 7 80 6560158 4979.01 5513 5391 1316.5

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