ASTROSAT CZTI

Data Quality Report

Orbit 54221

Creation date: 2025-10-06T12:13:48.089475
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/AS1C09_004T08_9000006514_54221cztM0_level2.fits modeM0/AS1C09_004T08_9000006514_54221cztM0_level2_quad_clean.evt
Size (bytes)619,122,24075,306,240
Size590.4 MB 71.8 MB
Events in quadrant A3,776,248543,186
Events in quadrant B3,140,899610,250
Events in quadrant C2,742,340543,230
Events in quadrant D12,780,082154,721

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0156301
B0137521
C0129201
D0421841

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A090
B090
C090
D090

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01240
B01240
C01240
D01240

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A61413615.878521%
B61411252.035499%
C6141320.521088%
D6142448773.054380%

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 7041 6142 309 309 4.39% 5.03%
B 7041 6142 67 67 0.95% 1.09%
C 7041 6142 14 14 0.20% 0.23%
D 7042 6143 3747 3747 53.21% 61.00%

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 12 17 964628 6278.22 623 608 153.5
A 12 194 128645 833.84 623 608 153.5
A 4 78 79193 511.78 623 608 153.5
B 4 171 258398 1863.58 632 610 138.3
B 5 236 130940 942.17 632 610 138.3
B 5 185 95672 687.22 632 610 138.3
C 15 198 112773 660.3 616 610 169.9
C 14 254 55635 323.93 616 610 169.9
C 12 252 43428 252.07 616 610 169.9
D 8 176 11306595 136949.19 284 270 82.6
D 13 84 58479 705.06 284 270 82.6
D 2 62 55356 667.23 284 270 82.6

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