ASTROSAT CZTI

Data Quality Report

Orbit 20170314_A02_029T01_9000001082_level2

Creation date: 2017-09-23T09:45:56.047769
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/AS1A02_029T01_9000001082cztM0_level2.evt modeM0/AS1A02_029T01_9000001082cztM0_level2_quad_clean.evt
Size (bytes)1,169,804,160244,696,320
Size1.1 GB 233.4 MB
Events in quadrant A7,907,9521,566,640
Events in quadrant B8,187,0511,628,890
Events in quadrant C10,068,7781,576,872
Events in quadrant D8,145,5401,498,525

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0420
B0420
C0420
D0420

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0344940
B0352800
C0406890
D0356050

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03380
B03380
C03380
D03380

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A16542780.471527%
B165421260.761697%
C165422211.335993%
D165421000.604522%

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 20357 16545 9 9 0.04% 0.05%
B 20357 16545 18 18 0.09% 0.11%
C 20357 16545 76 76 0.37% 0.46%
D 20357 16545 59 59 0.29% 0.36%

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 0 128 69335 168.17 1994 1956 400.7
A 15 239 41229 98.02 1994 1956 400.7
A 8 15 31057 72.63 1994 1956 400.7
B 4 173 82111 211.8 2032 1984 378.3
B 10 16 67559 173.34 2032 1984 378.3
B 4 239 53585 136.4 2032 1984 378.3
C 1 16 2327224 5136.04 1976 1988 452.7
C 12 4 38368 80.36 1976 1988 452.7
C 13 61 15183 29.15 1976 1988 452.7
D 1 52 348236 735.35 1954 1901 471.0
D 4 95 149747 313.91 1954 1901 471.0
D 2 234 50128 102.4 1954 1901 471.0

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