ASTROSAT CZTI

Data Quality Report

Orbit 20171021_A04_049T01_9000001632_level2

Creation date: 2021-08-27T22:29:36.820240
Switch to: Orbit-wise | Merged OBSID-wise
web.py, SVN revision $Rev$

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_049T01_9000001632cztM0_level2_bc.evt modeM0/AS1A04_049T01_9000001632cztM0_level2_quad_clean.evt
Size (bytes)424,837,44093,481,920
Size405.2 MB 89.2 MB
Events in quadrant A2,582,700565,423
Events in quadrant B3,153,111571,697
Events in quadrant C1,538,847590,959
Events in quadrant D5,030,587536,750

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A060
B060
C060
D070

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01640
B01640
C01640
D01640

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0200300
B0230100
C0166190
D0285850

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A81423213.942520%
B81426047.418325%
C8143790.970158%
D814388810.905072%

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 8693 8143 17 17 0.20% 0.21%
B 8693 8143 10 10 0.12% 0.12%
C 8693 8144 1 1 0.01% 0.01%
D 8694 8144 202 202 2.32% 2.48%

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 14 238 518728 6027.94 381 373 86.0
A 8 5 379561 4409.57 381 373 86.0
A 8 15 154489 1792.21 381 373 86.0
B 4 239 1095436 14403.41 385 374 76.0
B 10 16 160278 2103.23 385 374 76.0
B 15 204 120540 1580.55 385 374 76.0
C 14 234 7855 82.54 390 382 90.5
C 12 4 3857 38.38 390 382 90.5
C 13 61 2342 21.65 390 382 90.5
D 13 152 1307908 14907.36 366 351 87.7
D 10 253 847150 9654.29 366 351 87.7
D 1 52 598023 6814.01 366 351 87.7

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