ASTROSAT CZTI

Data Quality Report

Orbit 20170407_C02_028T01_9000001146_level2

Creation date: 2017-09-23T15:44:41.666433
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/AS1C02_028T01_9000001146cztM0_level2.evt modeM0/AS1C02_028T01_9000001146cztM0_level2_quad_clean.evt
Size (bytes)2,387,989,440200,096,640
Size2.2 GB 190.8 MB
Events in quadrant A43,080,874685,771
Events in quadrant B9,087,6271,364,326
Events in quadrant C8,688,7261,346,858
Events in quadrant D10,131,6931,298,391

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04040
B04040
C04040
D04040

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0170
B0170
C0170
D0170

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01412160
B0406130
C0399880
D0442000

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A197551494775.661858%
B19755730.369527%
C19755290.146798%
D197552311.169324%

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 21600 19757 14114 14114 65.34% 71.44%
B 21600 19758 13 13 0.06% 0.07%
C 21600 19758 1 1 0.00% 0.01%
D 21600 19758 188 188 0.87% 0.95%

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 39001106 182065.05 1058 1035 214.2
A 8 15 9955 41.64 1058 1035 214.2
A 12 194 9264 38.41 1058 1035 214.2
B 0 214 118276 265.97 2282 2228 436.3
B 11 51 60683 133.97 2282 2228 436.3
B 12 111 49417 108.15 2282 2228 436.3
C 9 54 19967 34.6 2218 2225 512.7
C 13 61 16757 28.34 2218 2225 512.7
C 8 128 10017 15.2 2218 2225 512.7
D 1 52 1291831 2419.84 2194 2135 533.0
D 1 159 173589 321.7 2194 2135 533.0
D 13 105 139644 258.01 2194 2135 533.0

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