ASTROSAT CZTI

Data Quality Report

Orbit 50177

Creation date: 2025-01-10T16:25:30.330603
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_003T01_9000006442_50177cztM0_level2.fits modeM0/AS1C09_003T01_9000006442_50177cztM0_level2_quad_clean.evt
Size (bytes)1,164,110,40071,887,680
Size1.1 GB 68.6 MB
Events in quadrant A7,945,991562,579
Events in quadrant B4,313,559692,776
Events in quadrant C15,676,617142,479
Events in quadrant D14,601,791278,128

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A030
B030
C030
D030

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0286921
B0178411
C0514085
D0482811

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01460
B01460
C01460
D01460

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7180137919.206128%
B71803074.275766%
C7180575480.139276%
D7180419858.467967%

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 7520 7181 1226 1226 16.30% 17.07%
B 7520 7181 217 217 2.89% 3.02%
C 7520 7181 5152 5152 68.51% 71.74%
D 7520 7181 4305 4305 57.25% 59.95%

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 0 98 2911021 16605.06 705 688 175.3
A 8 8 738952 4212.21 705 688 175.3
A 4 156 423028 2409.68 705 688 175.3
B 5 172 579831 3696.33 735 713 156.7
B 8 128 159386 1012.76 735 713 156.7
B 4 216 98790 625.99 735 713 156.7
C 15 213 8308061 77349.55 372 367 107.4
C 4 111 1562552 14544.86 372 367 107.4
C 15 230 1052842 9799.16 372 367 107.4
D 15 185 2664378 16625.38 541 520 160.2
D 15 168 1745695 10891.8 541 520 160.2
D 15 106 1542784 9625.41 541 520 160.2

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