ASTROSAT CZTI

Data Quality Report

Orbit 20180911_T02_100T01_9000002354_level2

Creation date: 2025-11-24T15:00:36.427012
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/AS1T02_100T01_9000002354cztM0_level2.fits modeM0/AS1T02_100T01_9000002354cztM0_level2_quad_clean.evt
Size (bytes)193,464,000122,788,800
Size184.5 MB 117.1 MB
Events in quadrant A1,207,264622,614
Events in quadrant B1,147,848614,526
Events in quadrant C1,154,446592,593
Events in quadrant D1,011,998549,365

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0409170
B0443690
C0408860
D0425270

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03960
B03960
C03960
D03960

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0480
B0480
C0480
D0480

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A194221900.978272%
B194222431.251158%
C194222541.307795%
D194222511.292349%

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 24222 19419 0 0 0.00% 0.00%
B 24222 19420 0 0 0.00% 0.00%
C 24222 19421 0 0 0.00% 0.00%
D 24222 19419 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 1179 11.22 314 296 78.7
A 7 110 937 8.15 314 296 78.7
A 0 30 931 8.07 314 296 78.7
B 2 9 925 10.31 304 291 61.5
B 14 254 777 7.9 304 291 61.5
B 5 128 772 7.82 304 291 61.5
C 1 80 875 7.36 304 286 80.0
C 1 81 870 7.3 304 286 80.0
C 2 191 807 6.51 304 286 80.0
D 6 38 768 6.49 288 263 77.8
D 6 67 741 6.15 288 263 77.8
D 10 189 737 6.1 288 263 77.8

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