ASTROSAT CZTI

Data Quality Report

Orbit 26987

Creation date: 2024-06-27T19:35:18.164419
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/AS1A09_145T01_9000003900_26987cztM0_level2.evt modeM0/AS1A09_145T01_9000003900_26987cztM0_level2_quad_clean.evt
Size (bytes)685,391,04090,596,160
Size653.6 MB 86.4 MB
Events in quadrant A8,684,991515,509
Events in quadrant B3,430,366606,655
Events in quadrant C3,515,982579,315
Events in quadrant D4,651,415553,548

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0305360
B0143500
C0145860
D0183340

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A040
B040
C040
D040

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7006225432.172424%
B7007811.155987%
C7006981.398801%
D70062693.839566%

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 7371 7006 1531 1531 20.77% 21.85%
B 7372 7007 0 0 0.00% 0.00%
C 7371 7006 6 6 0.08% 0.09%
D 7371 7006 189 189 2.56% 2.70%

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 14 235 5622606 36126.59 761 746 155.6
A 6 16 81894 521.46 761 746 155.6
A 5 168 27099 169.35 761 746 155.6
B 0 219 25586 147.8 869 848 167.4
B 12 111 20488 117.34 869 848 167.4
B 11 111 18486 105.38 869 848 167.4
C 14 238 133568 667.02 838 848 199.0
C 15 208 59353 294.03 838 848 199.0
C 2 16 28778 140.37 838 848 199.0
D 1 52 1103149 5499.19 835 814 200.5
D 2 250 211205 1049.57 835 814 200.5
D 12 233 119849 593.82 835 814 200.5

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