ASTROSAT CZTI

Data Quality Report

Orbit 20201121_A10_002T05_9000004024_level2

Creation date: 2021-01-07T09:01:57.472652
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/AS1A10_002T05_9000004024cztM0_level2_bc.evt modeM0/AS1A10_002T05_9000004024cztM0_level2_quad_clean.evt
Size (bytes)4,860,630,7201,671,379,200
Size4.5 GB 1.6 GB
Events in quadrant A26,457,42011,076,850
Events in quadrant B31,481,14910,838,739
Events in quadrant C29,491,68510,409,502
Events in quadrant D51,492,5969,962,439

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A024740
B024740
C024740
D024740

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02545030
B02735510
C02703440
D03587770

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01750
B01750
C01750
D01750

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A12168711370.934364%
B12168720181.658353%
C12168725572.101293%
D12168794007.724736%

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 138857 121680 8 8 0.01% 0.01%
B 138857 121671 55 55 0.04% 0.05%
C 138857 121673 49 49 0.04% 0.04%
D 138857 121674 732 732 0.53% 0.60%

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 6 16 297399 197.07 6725 6607 1475.6
A 13 254 202294 132.62 6725 6607 1475.6
A 0 13 98149 62.04 6725 6607 1475.6
B 10 245 3290530 2634.63 6607 6450 1246.5
B 0 190 657234 522.09 6607 6450 1246.5
B 0 230 538854 427.12 6607 6450 1246.5
C 3 233 4563493 3021.95 6323 6276 1508.0
C 15 208 309611 201.15 6323 6276 1508.0
C 2 16 198543 127.49 6323 6276 1508.0
D 1 52 14981049 10246.86 6373 6200 1461.4
D 13 104 6788356 4640.84 6373 6200 1461.4
D 2 250 4160206 2842.47 6373 6200 1461.4

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