ASTROSAT CZTI

Data Quality Report

Orbit 58655

Creation date: 2026-07-31T19:53:28.331049
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/AS1A14_004T06_9000006594_58655cztM0_level2.fits modeM0/AS1A14_004T06_9000006594_58655cztM0_level2_quad_clean.evt
Size (bytes)510,480,00099,688,320
Size486.8 MB 95.1 MB
Events in quadrant A3,415,199669,738
Events in quadrant B4,171,242688,919
Events in quadrant C3,923,532630,986
Events in quadrant D6,852,751550,547

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0149512
B0170512
C0163832
D0251262

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01380
B01380
C01380
D01380

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0140
B0140
C0140
D0151

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A68661572.286630%
B68664276.219050%
C68662894.209147%
D686693613.632391%

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 7831 6866 50 50 0.64% 0.73%
B 7831 6866 150 150 1.92% 2.18%
C 7831 6866 148 148 1.89% 2.16%
D 7831 6866 798 798 10.19% 11.62%

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 10 17 156698 809.36 781 761 192.7
A 10 251 110151 567.77 781 761 192.7
A 4 249 79279 407.53 781 761 192.7
B 5 185 808549 4970.01 754 726 162.5
B 0 186 79891 487.05 754 726 162.5
B 2 249 61289 372.6 754 726 162.5
C 12 249 366848 1794.3 747 741 204.0
C 13 3 246586 1204.89 747 741 204.0
C 15 217 240263 1173.9 747 741 204.0
D 11 129 2044601 10128.24 717 686 201.8
D 7 222 541314 2678.98 717 686 201.8
D 8 240 457286 2262.6 717 686 201.8

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