ASTROSAT CZTI

Data Quality Report

Orbit 20171230_A04_066T01_9000001802_level2

Creation date: 2018-08-01T22:12:21.702262
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/AS1A04_066T01_9000001802cztM0_level2_bc.evt modeM0/AS1A04_066T01_9000001802cztM0_level2_quad_clean.evt
Size (bytes)3,846,844,8001,509,364,800
Size3.6 GB 1.4 GB
Events in quadrant A29,716,89710,293,862
Events in quadrant B37,268,3169,711,836
Events in quadrant C18,048,91210,321,140
Events in quadrant D25,948,7899,830,443

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02301170
B02644750
C01717400
D02008540

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A016510
B016520
C016500
D016460

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01290
B01290
C01290
D01290

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A8107232834.049487%
B810141087713.426075%
C811427960.980996%
D8114927053.333374%

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 102419 81246 50 50 0.05% 0.06%
B 102419 81105 449 449 0.44% 0.55%
C 102420 81312 87 87 0.08% 0.11%
D 102419 81308 365 365 0.36% 0.45%

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 13 251 9765999 10843.51 4168 4108 900.3
A 8 15 1716297 1901.9 4168 4108 900.3
A 1 162 1144369 1266.6 4168 4108 900.3
B 4 239 11372895 15168.98 3945 3853 749.5
B 15 204 2928849 3902.63 3945 3853 749.5
B 4 206 2130649 2837.65 3945 3853 749.5
C 15 208 1150854 1275.66 4087 4051 899.0
C 5 112 478853 528.15 4087 4051 899.0
C 4 175 184578 200.81 4087 4051 899.0
D 1 52 2746115 2875.11 4099 3964 953.8
D 13 104 1512035 1581.19 4099 3964 953.8
D 2 33 1193520 1247.23 4099 3964 953.8

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