ASTROSAT CZTI

Data Quality Report

Orbit 18926

Creation date: 2024-06-27T17:56:38.626979
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/AS1A05_163T01_9000002820_18926cztM0_level2.evt modeM0/AS1A05_163T01_9000002820_18926cztM0_level2_quad_clean.evt
Size (bytes)1,207,860,480154,926,720
Size1.1 GB 147.7 MB
Events in quadrant A5,917,271984,826
Events in quadrant B9,320,772963,463
Events in quadrant C6,705,882975,738
Events in quadrant D13,782,777893,195

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0259083
B0362223
C0278553
D0495413

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02560
B02560
C02560
D02560

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0140
B0150
C0150
D0150

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A12654760.600601%
B126549347.381065%
C126532251.778234%
D12653268021.180748%

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 14004 12656 3 3 0.02% 0.02%
B 14004 12656 506 506 3.61% 4.00%
C 14003 12655 2 2 0.01% 0.02%
D 14003 12655 1861 1861 13.29% 14.71%

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 14 235 41020 127.96 1523 1488 308.9
A 13 254 19141 57.14 1523 1488 308.9
A 0 226 13280 38.17 1523 1488 308.9
B 3 112 2869772 10174.11 1480 1444 281.9
B 7 220 179591 631.89 1480 1444 281.9
B 10 247 176606 621.31 1480 1444 281.9
C 3 233 716150 2088.42 1463 1472 342.2
C 14 238 228325 662.91 1463 1472 342.2
C 9 221 22866 62.52 1463 1472 342.2
D 7 238 7457213 22743.6 1345 1307 327.8
D 1 52 839511 2556.87 1345 1307 327.8
D 12 218 192065 581.89 1345 1307 327.8

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