ASTROSAT CZTI

Data Quality Report

Orbit 15235

Creation date: 2024-06-27T17:05:39.736425
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/AS1A04_105T01_9000002248_15235cztM0_level2.evt modeM0/AS1A04_105T01_9000002248_15235cztM0_level2_quad_clean.evt
Size (bytes)1,487,620,800230,849,280
Size1.4 GB 220.2 MB
Events in quadrant A13,210,5201,416,288
Events in quadrant B9,606,6721,466,105
Events in quadrant C10,809,3521,449,412
Events in quadrant D10,171,7711,378,447

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0170
B0170
C0170
D0170

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03780
B03780
C03780
D03780

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0515534
B0400383
C0429753
D0432343

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A185965352.876963%
B185963691.984298%
C185964662.505915%
D185965783.108195%

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 20307 18597 169 169 0.83% 0.91%
B 20307 18597 93 93 0.46% 0.50%
C 20307 18597 220 220 1.08% 1.18%
D 20307 18597 345 345 1.70% 1.86%

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 0 253 4221092 9439.17 2210 2166 447.0
A 12 189 426705 949.84 2210 2166 447.0
A 9 143 30479 63.35 2210 2166 447.0
B 10 16 309107 726.37 2221 2163 422.6
B 0 229 152650 356.12 2221 2163 422.6
B 3 64 120881 280.94 2221 2163 422.6
C 4 254 1278784 2565.0 2145 2160 497.7
C 3 233 1080698 2167.01 2145 2160 497.7
C 10 22 40441 76.91 2145 2160 497.7
D 5 222 790317 1515.3 2138 2073 520.2
D 1 255 566410 1084.86 2138 2073 520.2
D 7 38 427768 818.34 2138 2073 520.2

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