ASTROSAT CZTI

Data Quality Report

Orbit 20201110_A09_038T41_9000003986_level2

Creation date: 2021-01-07T14:20:15.031177
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/AS1A09_038T41_9000003986cztM0_level2_bc.evt modeM0/AS1A09_038T41_9000003986cztM0_level2_quad_clean.evt
Size (bytes)176,938,56081,495,360
Size168.7 MB 77.7 MB
Events in quadrant A893,182572,341
Events in quadrant B1,137,698576,595
Events in quadrant C1,024,565536,171
Events in quadrant D2,030,639508,395

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A086720
B096560
C092110
D0121020

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A020
B030
C030
D030

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A08241
B08241
C08241
D08241

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A4160100.240385%
B4160741.778846%
C4160491.177885%
D41603327.980769%

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 4159 4159 0 0 0.00% 0.00%
B 4159 4159 4 4 0.10% 0.10%
C 4159 4159 1 1 0.02% 0.02%
D 4159 4159 181 181 4.35% 4.35%

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 13 254 6993 130.14 228 224 52.0
A 8 192 6167 114.26 228 224 52.0
A 13 248 2851 50.51 228 224 52.0
B 5 172 187442 4068.02 230 226 46.0
B 3 64 23555 506.92 230 226 46.0
B 0 230 21490 462.05 230 226 46.0
C 8 208 191464 3657.44 213 212 52.3
C 3 233 5066 92.83 213 212 52.3
C 15 208 3893 70.39 213 212 52.3
D 6 112 524510 10172.58 212 205 51.5
D 1 52 454054 8805.59 212 205 51.5
D 2 250 69808 1350.44 212 205 51.5

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