ASTROSAT CZTI

Data Quality Report

Orbit 20210826_A10_053T11_9000004668_level2

Creation date: 2025-12-28T10:05:18.242427
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_053T11_9000004668cztM0_level2.fits modeM0/AS1A10_053T11_9000004668cztM0_level2_quad_clean.evt
Size (bytes)352,788,480161,156,160
Size336.4 MB 153.7 MB
Events in quadrant A2,192,020610,324
Events in quadrant B2,048,446601,810
Events in quadrant C2,076,156582,994
Events in quadrant D1,822,068538,345

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0400
B0400
C0400
D0400

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0764940
B01136250
C0947800
D01092920

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A07580
B07580
C07580
D07580

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A370274101.107300%
B3702910392.805909%
C3702816724.515502%
D3702826577.175651%

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 41163 37023 0 0 0.00% 0.00%
B 41164 37022 0 0 0.00% 0.00%
C 41164 37022 0 0 0.00% 0.00%
D 41164 36997 0 0 0.00% 0.00%

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 0 29 2115 11.07 571 537 142.5
A 7 110 1720 8.3 571 537 142.5
A 0 30 1690 8.09 571 537 142.5
B 2 9 1660 10.59 540 515 108.2
B 2 8 1390 8.09 540 515 108.2
B 3 17 1376 7.96 540 515 108.2
C 3 126 1484 6.94 549 513 139.9
C 12 241 1445 6.66 549 513 139.9
C 9 242 1415 6.45 549 513 139.9
D 3 14 1415 6.64 521 475 141.5
D 10 189 1367 6.3 521 475 141.5
D 15 47 1272 5.63 521 475 141.5

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