ASTROSAT CZTI

Data Quality Report

Orbit 21170

Creation date: 2024-06-27T18:24:25.156574
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/AS1C04_001T01_9000003126_21170cztM0_level2.evt modeM0/AS1C04_001T01_9000003126_21170cztM0_level2_quad_clean.evt
Size (bytes)857,678,400165,795,840
Size817.9 MB 158.1 MB
Events in quadrant A4,318,7571,129,285
Events in quadrant B4,684,7061,147,181
Events in quadrant C4,183,0821,102,820
Events in quadrant D12,158,255994,736

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A040
B040
C040
D040

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0193501
B0199021
C0188311
D0427241

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01880
B01880
C01880
D01880

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A9333840.900032%
B9334750.803514%
C9334780.835655%
D9334159217.055925%

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 9763 9334 17 17 0.17% 0.18%
B 9764 9335 7 7 0.07% 0.07%
C 9764 9335 0 0 0.00% 0.00%
D 9764 9335 1414 1414 14.48% 15.15%

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 5 16 196373 901.95 1067 1044 216.6
A 13 254 13123 55.78 1067 1044 216.6
A 0 226 9188 37.61 1067 1044 216.6
B 0 189 192273 951.31 1064 1036 201.0
B 0 230 56359 275.2 1064 1036 201.0
B 0 190 53745 262.2 1064 1036 201.0
C 14 238 160205 668.3 1022 1028 238.2
C 3 233 18942 75.21 1022 1028 238.2
C 10 91 8477 31.27 1022 1028 238.2
D 1 20 4912751 20527.43 990 959 239.3
D 7 238 2695346 11260.42 990 959 239.3
D 1 52 353798 1474.59 990 959 239.3

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