ASTROSAT CZTI

Data Quality Report

Orbit 50974

Creation date: 2025-03-01T19:50:08.603900
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/AS1C07_001T02_9000006452_50974cztM0_level2.fits modeM0/AS1C07_001T02_9000006452_50974cztM0_level2_quad_clean.evt
Size (bytes)789,356,16084,133,440
Size752.8 MB 80.2 MB
Events in quadrant A12,800,396297,970
Events in quadrant B4,082,300688,016
Events in quadrant C4,494,268593,899
Events in quadrant D7,315,952493,732

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01380
B01380
C01380
D01380

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A090
B090
C090
D090

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0426371
B0170051
C0180371
D0264181

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6793405359.664360%
B67942713.988814%
C67943845.652046%
D6794121717.912864%

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 7717 6792 3531 3531 45.76% 51.99%
B 7719 6794 86 86 1.11% 1.27%
C 7719 6794 253 253 3.28% 3.72%
D 7719 6794 1015 1015 13.15% 14.94%

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 14 254 8585361 68916.2 489 475 124.6
A 8 43 1168807 9378.92 489 475 124.6
A 12 80 505440 4053.67 489 475 124.6
B 4 81 833011 5521.71 711 685 150.7
B 7 252 64118 420.82 711 685 150.7
B 8 128 57956 379.94 711 685 150.7
C 15 147 486557 2523.64 691 684 192.5
C 13 3 355444 1842.63 691 684 192.5
C 14 245 167465 866.26 691 684 192.5
D 8 176 3072774 16664.34 657 634 184.4
D 8 208 389248 2107.98 657 634 184.4
D 10 181 319353 1728.84 657 634 184.4

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