ASTROSAT CZTI

Data Quality Report

Orbit 20170112_T01_151T01_9000000960_level2

Creation date: 2017-09-22T20:27:36.024412
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/AS1T01_151T01_9000000960cztM0_level2.evt modeM0/AS1T01_151T01_9000000960cztM0_level2_quad_clean.evt
Size (bytes)8,274,824,6401,624,268,160
Size7.7 GB 1.5 GB
Events in quadrant A58,759,78810,343,081
Events in quadrant B62,814,01310,376,228
Events in quadrant C56,521,59010,154,212
Events in quadrant D64,127,3079,816,574

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A025320
B025320
C025320
D025320

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02586350
B02681880
C02548920
D02716380

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02170
B02170
C02170
D02170

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A12419118181.463874%
B12419121591.738451%
C1241919470.762535%
D12419120101.618475%

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 145216 124216 251 251 0.17% 0.20%
B 145216 124216 485 485 0.33% 0.39%
C 145216 124216 8 8 0.01% 0.01%
D 145216 124216 936 936 0.64% 0.75%

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 14 239 761086 250.14 14864 14543 2984.4
A 15 234 388617 125.34 14864 14543 2984.4
A 13 248 232761 73.12 14864 14543 2984.4
B 4 239 1489486 525.7 14920 14576 2805.6
B 0 214 1216164 428.28 14920 14576 2805.6
B 0 228 828399 290.07 14920 14576 2805.6
C 10 22 230382 65.1 14391 14443 3317.2
C 13 61 113106 29.74 14391 14443 3317.2
C 1 16 89259 22.55 14391 14443 3317.2
D 8 195 4111000 1173.33 14431 13988 3491.8
D 1 239 1355567 384.21 14431 13988 3491.8
D 14 34 1101680 311.5 14431 13988 3491.8

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