ASTROSAT CZTI

Data Quality Report

Orbit 35494

Creation date: 2022-04-22T09:24:29.095181
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/AS1A11_097T22_9000005082_35494cztM0_level2.evt modeM0/AS1A11_097T22_9000005082_35494cztM0_level2_quad_clean.evt
Size (bytes)427,213,44071,732,160
Size407.4 MB 68.4 MB
Events in quadrant A2,659,848444,209
Events in quadrant B3,228,217476,486
Events in quadrant C3,581,932463,283
Events in quadrant D3,137,005445,927

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0370
B0370
C0370
D0380

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0107933
B0127312
C0137142
D0127622

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0980
B0980
C0980
D0980

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A4881781.598033%
B48812535.183364%
C48812635.388240%
D48811964.015571%

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 7033 4882 18 18 0.26% 0.37%
B 7033 4882 131 131 1.86% 2.68%
C 7033 4882 195 195 2.77% 3.99%
D 7033 4882 169 169 2.40% 3.46%

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 15 169 298646 2613.51 576 567 114.1
A 10 83 126110 1100.74 576 567 114.1
A 13 254 7499 60.78 576 567 114.1
B 5 172 654773 6078.44 577 565 107.6
B 5 236 147533 1365.52 577 565 107.6
B 5 200 118706 1097.68 577 565 107.6
C 0 10 567101 4420.29 562 568 128.2
C 0 207 295146 2298.4 562 568 128.2
C 1 23 293978 2289.29 562 568 128.2
D 7 80 793589 6019.53 555 541 131.7
D 13 249 77427 583.59 555 541 131.7
D 10 199 33300 248.65 555 541 131.7

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