ASTROSAT CZTI

Data Quality Report

Orbit 51277

Creation date: 2025-03-22T16:14:55.547283
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_001T01_9000006454_51277cztM0_level2.fits modeM0/AS1C07_001T01_9000006454_51277cztM0_level2_quad_clean.evt
Size (bytes)665,389,44094,176,000
Size634.6 MB 89.8 MB
Events in quadrant A6,492,001635,046
Events in quadrant B3,693,225722,101
Events in quadrant C9,935,350431,627
Events in quadrant D3,992,617597,053

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0240152
B0156242
C0341423
D0166092

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01380
B01380
C01380
D01380

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0230
B0230
C0230
D0230

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A66783565.330937%
B66791712.560264%
C6678255938.319856%
D66782033.039832%

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 9008 6678 110 110 1.22% 1.65%
B 9009 6680 41 41 0.46% 0.61%
C 9008 6678 2456 2456 27.26% 36.78%
D 9008 6679 138 138 1.53% 2.07%

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 3 2224989 12647.58 709 690 175.9
A 8 10 396956 2253.21 709 690 175.9
A 9 160 343635 1950.02 709 690 175.9
B 5 185 166545 1097.35 721 695 151.1
B 8 128 147760 973.06 721 695 151.1
B 10 247 131304 864.18 721 695 151.1
C 4 12 6678514 43461.85 555 549 153.7
C 10 171 539186 3505.58 555 549 153.7
C 1 45 154807 1003.95 555 549 153.7
D 8 176 401714 2094.29 692 670 191.5
D 3 12 206217 1073.38 692 670 191.5
D 6 42 190859 993.18 692 670 191.5

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