ASTROSAT CZTI

Data Quality Report

Orbit 26172

Creation date: 2024-06-27T19:25:39.151792
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/AS1A09_138T04_9000003776_26172cztM0_level2.evt modeM0/AS1A09_138T04_9000003776_26172cztM0_level2_quad_clean.evt
Size (bytes)846,846,720161,464,320
Size807.6 MB 154.0 MB
Events in quadrant A5,590,1901,034,979
Events in quadrant B5,651,7421,067,167
Events in quadrant C6,838,6711,014,821
Events in quadrant D6,826,0491,015,716

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0260
B0260
C0260
D0260

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0230130
B0232130
C0269730
D0271470

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A10941900.822594%
B109421391.270334%
C109424133.774447%
D109422081.900932%

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 13541 10942 0 0 0.00% 0.00%
B 13542 10943 1 1 0.01% 0.01%
C 13542 10944 156 156 1.15% 1.43%
D 13542 10944 120 120 0.89% 1.10%

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 13 254 16374 52.67 1443 1416 284.0
A 6 16 14251 45.2 1443 1416 284.0
A 3 137 12727 39.83 1443 1416 284.0
B 12 111 31701 112.05 1429 1393 270.5
B 0 230 30780 108.64 1429 1393 270.5
B 11 111 28934 101.82 1429 1393 270.5
C 2 16 1075394 3318.07 1388 1402 323.7
C 14 238 224322 688.7 1388 1402 323.7
C 3 233 120172 366.94 1388 1402 323.7
D 1 52 1346729 4024.84 1424 1392 334.3
D 12 233 65126 190.67 1424 1392 334.3
D 2 234 43080 124.72 1424 1392 334.3

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