ASTROSAT CZTI

Data Quality Report

Orbit 20201031_A09_038T26_9000003948_level2

Creation date: 2021-01-07T16:22:44.735054
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/AS1A09_038T26_9000003948cztM0_level2_bc.evt modeM0/AS1A09_038T26_9000003948cztM0_level2_quad_clean.evt
Size (bytes)126,912,96046,172,160
Size121.0 MB 44.0 MB
Events in quadrant A634,734303,512
Events in quadrant B714,699309,476
Events in quadrant C926,921292,199
Events in quadrant D1,351,653275,668

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A063000
B065980
C074640
D091920

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0600
B0600
C0600
D0600

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0100
B0100
C0100
D0100

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A3056200.654450%
B3056391.276178%
C3056933.043194%
D30562387.787958%

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 3981 3055 0 0 0.00% 0.00%
B 3981 3055 1 1 0.03% 0.03%
C 3981 3055 1 1 0.03% 0.03%
D 3981 3056 33 33 0.83% 1.08%

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 13 254 5223 133.3 163 159 38.0
A 15 174 2102 51.15 163 159 38.0
A 13 170 1449 33.96 163 159 38.0
B 10 245 32914 955.63 165 160 34.3
B 0 230 23053 667.92 165 160 34.3
B 0 244 10321 296.45 165 160 34.3
C 7 221 281265 7114.96 156 154 39.5
C 2 16 42048 1060.34 156 154 39.5
C 13 61 882 18.43 156 154 39.5
D 1 52 677253 17949.51 154 148 37.7
D 2 250 52128 1377.95 154 148 37.7
D 7 80 16913 444.43 154 148 37.7

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