ASTROSAT CZTI

Data Quality Report

Orbit 20201112_T03_263T01_9000003990_level2

Creation date: 2021-01-05T10:56:35.881944
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/AS1T03_263T01_9000003990cztM0_level2_bc.evt modeM0/AS1T03_263T01_9000003990cztM0_level2_quad_clean.evt
Size (bytes)4,123,301,7601,657,200,960
Size3.8 GB 1.5 GB
Events in quadrant A30,603,60111,205,445
Events in quadrant B27,618,39111,278,788
Events in quadrant C27,445,69910,907,057
Events in quadrant D32,742,99910,294,941

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A019380
B019380
C019380
D019380

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02293000
B02243230
C02261070
D02388520

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01650
B01650
C01650
D01650

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A9504415031.581373%
B9504433393.513110%
C9504424332.559867%
D9504430263.183789%

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 111570 95033 107 107 0.10% 0.11%
B 111570 95029 50 50 0.04% 0.05%
C 111570 95030 8 8 0.01% 0.01%
D 111570 95032 257 257 0.23% 0.27%

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 6181244 3839.59 6072 5787 1608.4
A 0 13 899447 555.63 6072 5787 1608.4
A 13 254 145188 86.67 6072 5787 1608.4
B 3 64 3320549 2311.02 6118 5923 1434.3
B 5 255 221448 150.27 6118 5923 1434.3
B 0 230 160800 107.98 6118 5923 1434.3
C 3 233 4434473 2706.69 5884 5825 1636.2
C 0 207 277742 166.19 5884 5825 1636.2
C 10 22 72883 40.98 5884 5825 1636.2
D 1 52 6411682 4013.51 5827 5496 1596.2
D 11 176 2490102 1556.62 5827 5496 1596.2
D 2 250 927295 577.51 5827 5496 1596.2

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