ASTROSAT CZTI

Data Quality Report

Orbit 20171020_A04_058T02_9000001626_level2

Creation date: 2017-10-22T13:46:33.191886
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_058T02_9000001626cztM0_level2.evt modeM0/AS1A04_058T02_9000001626cztM0_level2_quad_clean.evt
Size (bytes)1,350,685,440225,702,720
Size1.3 GB 215.2 MB
Events in quadrant A12,928,1311,394,954
Events in quadrant B10,412,9651,467,695
Events in quadrant C6,812,3291,525,848
Events in quadrant D9,748,8141,419,804

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0488050
B0409160
C0308030
D0394020

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0180
B0180
C0180
D0180

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03000
B02980
C02980
D03000

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A14884177611.932276%
B1488310607.122220%
C148911260.846149%
D148855213.500168%

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 19775 14969 1210 1210 6.12% 8.08%
B 19775 14960 601 601 3.04% 4.02%
C 19775 14960 36 36 0.18% 0.24%
D 19775 14957 339 339 1.71% 2.27%

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 5 2501233 7604.94 1627 1593 328.7
A 0 23 1949652 5926.8 1627 1593 328.7
A 8 15 1301885 3956.02 1627 1593 328.7
B 4 239 2914870 9159.53 1684 1641 318.1
B 15 204 388131 1215.17 1684 1641 318.1
B 0 219 182045 567.21 1684 1641 318.1
C 9 204 143005 361.56 1686 1691 390.8
C 0 207 72400 180.91 1686 1691 390.8
C 13 61 12541 27.76 1686 1691 390.8
D 1 52 748189 1876.49 1658 1608 397.9
D 13 104 452883 1134.25 1658 1608 397.9
D 7 71 296295 740.68 1658 1608 397.9

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